EN
for SKF MultiFlex oil and grease multiline centralized lubrication systems
Multiline pumps of series RA
Version 02
Assembly instructions acc. to EC Dir. 2006/42/EC for
partly completed machinery, with associated operating instructions
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EC Declaration of Incorporation acc. to Machinery Directive 2006/42/EC, Appendix II Part 1 BT h e m a n u f a c t u r e r , S K F L u b r ic a t io n S y s t e m s G m b H , H o c k e n h e im P la n t , 2 . In d u s t r ie s t r a s s e 4 , D E - 6 8 7 6 6 H o c k e n h e im , h e r e b y d e c la r e s t h e c o n f o r m it y o f t h e p a r t ly c o m p le t e d m a c h in e r y
D e s ig n a t io n : M u lt ilin e p u m p sT y p e : R AIt e m n u m b e r : 7 5 0 - X X X - X X X XY e a r o f m a n u f a c t u r e : S e e r a t in g p la t ew it h t h e e s s e n t ia l p r o t e c t io n r e q u ir e m e n t s o f M a c h in e r y D ir e c t iv e 2 0 0 6 / 4 2 / E C a t t h e t im e o f p la c in g o n t h e m a r k e t .
1 .1 .2 · 1 .1 .3 · 1 .3 .2 · 1 .3 .4 · 1 .5 .1 · 1 .5 .6 · 1 .5 .8 · 1 .5 .9 · 1 .6 .1 · 1 .7 .1 · 1 .7 .3 · 1 .7 .4
T h e t e c h n ic a l d o c u m e n t a t io n d e s c r ib e d in A n n e x V II, p a r t B o f t h is D ir e c t iv e h a s b e e n p r e p a r e d . W e u n d e r t a k e t o t r a n s m it , in r e s p o n s e t o a r e a s o n e d r e q u e s t b y t h e n a t io n a l a u t h o r it ie s , t h e s p e c ia l d o c u m e n t s fo r t h is p a r t ly c o m p le t e d m a c h in e . T h e H e a d o f T e c h n ic a l S t a n d a r d s is t h e a u t h o r iz e d r e p r e s e n t a t iv e fo r t h e t e c h n ic a l d o c u m e n t a t io n . S e e t h e m a n u f a c t u r e r in fo r m a t io n fo r t h e a d d r e s s .
F u r t h e r m o r e , t h e fo llo w in g D ir e c t iv e s a n d (h a r m o n iz e d ) s t a n d a r d s w e r e a p p lie d in t h e a p p lic a b le a r e a s :2 0 1 1 / 6 5 / E U R o H S II 2 0 1 4 / 3 0 / E U E le c t r o m a g n e t ic C o m p a t ib ilit y | In d u s t r y
S t a n d a r d E d it io n S t a n d a r d E d it io n S t a n d a r d E d it io n S t a n d a r d E d it io n
D IN E N IS O 1 2 1 0 0 2 0 1 1 D IN E N 6 0 9 4 7 - 5 - 1 2 0 1 0 D IN E N 6 1 0 0 0 - 6 - 2 2 0 0 6 D IN E N 6 1 0 0 0 - 6 - 4 2 0 1 1
D IN E N 8 0 9 2 0 1 2 D IN E N 6 1 1 3 1 - 2 2 0 0 8 C o r r e c t io n 2 0 1 1 D IN E N 6 0 9 4 7 - 5 - 1 2 0 1 0
D IN E N 6 0 2 0 4 - 1 2 0 0 7 C o r r e c t io n 2 0 0 9 D IN E N 6 1 0 0 0 - 6 - 3 2 0 1 1
C o r r e c t io n 2 0 1 0 D IN E N 6 0 0 3 4 - 1 2 0 1 5 C o r r e c t io n 2 0 1 2
D IN E N 5 0 5 8 1 2 0 1 3 D IN E N 6 1 0 0 0 - 6 - 1 2 0 0 7
T h e p a r t ia lly c o m p le t e d m a c h in e r y m u s t n o t b e p u t in t o s e r v ic e u n t il t h e m a c h in e r y in t o w h ic h it is t o b e in c o r p o r a t e d h a s b e e n d e c la r e d in c o n f o r m it y w it h t h e p r o v is io n s o f M a c h in e r y D ir e c t iv e 2 0 0 6 / 4 2 / E C a n d a ll o t h e r a p p lic a b le D ir e c t iv e s .
H o c k e n h e im , 2 0 1 6 ,0 4 ,2 5
J ü r g e n K r e u t z k ä m p e r M a n a g e r R & D G e r m a n yS K F L u b r ic a t io n B u s in e s s U n it
S t e fa n S c h ü r m a n n M a n a g e r R & D H o c k e n h e im / W a lld o r f S K F L u b r ic a t io n B u s in e s s U n it
EN E C D e c la r a t io n o f In c o r p o r a t io n
3
Masthead
Masthead
These assembly instructions pursuant to EC
Machinery Directive 2006/42/EC are an
integral part of the product described here
and must be kept for future use.
Warranty
The instructions do not contain any infor-
mation on the warranty. This can be found
in the General Conditions of Sales, which
are available at:
www.skf.com/lubrication.
Copyright / Integration of instructions
© SKF Lubrication Systems Germany
GmbH
All rights reserved.
These instructions are protected by copy-
right.
The use of the contents for the purpose of
integration into the documentation of the
machine manufacturer in whose product it
will be integrated is expressly allowed. This
also includes the preparation of training
documents for internal, non-commercial
purposes. Any other usage of any kind wi-
thout written permission of the rights hol-
der is prohibited and constitutes a violation
of copyright.
EN
Manufacturer and service address
If you have technical questions, please
contact:
SKF Lubrication Systems Germany GmbH
Berlin Plant
Motzener Strasse 35/37
12277 Berlin
Germany
Tel. +49 (0)30 72002-0
Fax +49 (0)30 72002-111
www.skf.com/lubrication
Hockenheim Plant
2. Industriestrasse 4
68766 Hockenheim
Germany
Tel. +49 (0)62 05 27-0
Fax +49 (0)62 05 27-101
www.skf.com/lubrication
4
EN
Table of contents
Table of contents
Multiline pumps of series RA 1
EC Declaration 2 Explanation of symbols and signs 6
1. Safety instructions 8
1.1 General safety instructions 8
1.2 General behavior when handling the product 8
1.3 Qualiied technical personnel 9
1.4 Electric shock hazard 9
1.5 System pressure or hydraulic pressure hazard 10
1.6 Operation 10
1.7 Assembly/maintenance/malfunction/ decommissioning/disposal 10
1.8 Intended use 11
1.9 Foreseeable misuse 11
1.10 Disclaimer of liability 12
1.11 Explosion protection in ATEX 12
1.12 Referenced documents 12
1.13 Warning labels on the product 13
1.14 Residual risks 14
2. Lubricants 16
2.1 General information 16
2.2 Selection of lubricants 16
2.3 Approved lubricants 17
2.4 Lubricants and the environment 18
2.5 Lubricant hazards 18
3. Overview/functional description 19
4. Assembly 22
4.1 General information 22
4.2 Setup and attachment 22
4.3 Oil lubrication pumps/oil lubrication pump units - Port dimensions, assembly holes and minimum mounting dimensions 24
4.3.1 Rotary drive, coaxial 24
RA 1UA 00 / 44 21 R 0001 25
4.3.2 Rotary drive with coaxial gear 26
RA 2UB 15 / 442 D R 0001 27
4.3.3 Rotary drive with bevel gear 28
RA 3UA 01 A 42441 R 0001 29
4.3.4 Electric motor drive, coaxial 30
RA 1M 00 / 44421 0001 AF 07 31
4.3.5 Electric motor drive, with coaxial gear 32
RA 2M 15/ 421 DR 0001 AF 07 33
4.3.6 Electric motor drive with bevel gear 34
RA 3M 01 / 44421 / 0001 AF 07 35
4.4 RA multiline pump units for oil with 3-, 7-, or 15-liter reservoir 36
4.4.1 RA multiline pump units with 3-liter reservoir 36
4.4.2 RA multiline pump units with 7-liter reservoir 37
4.4.3 RA multiline pump units with 15-literreservoir 38
4.5 Grease lubrication pump port dimensions, assembly holes and minimum mounting dimensions 42
4.5.1 Rotary drive, with bevel gear and grease reservoir 42
RA 20 F 3UA 01 B 442 / 0001 43
4.5.2 Electric motor drive, with coaxial gear and grease reservoir 44
4.5.3 Electric motor drive, with bevel gear and grease reservoir 47
4.6 Assembly of the RA multiline pump 50
4.6.1 Rotary multiline pump 50
Assembly instructions
5
ENTable of contents
4.6.2 Multiline pump unit in foot design, type IM B34 51
4.6.3 Multiline pump units with 3- and 7-liter reservoir 52
4.7 Electrical motor connection 53
4.8 Assembly of electric ill level switches 54
4.8.1 Fill level switch for oil (V) 55
4.8.2 Fill level switch for grease (E) 55
4.8.3 Fill level switch for grease (F) 55
4.9 Lubrication line arrangement 56
4.10 Venting the RA multiline pump and lubricant lines 57
4.10.1 Venting the RA grease
multiline pump 57
4.10.2 Venting the RA oil multiline pump 58
4.11 Adjusting the displacement using displacement chart and continuous operating pressure 59
4.12 Note on the rating plate 62
4.13 Information on CE marking 62
Operating instructions associated with assembly instructions 65
1. Safety instructions 66
1.1 General information 66
1.2 Disclaimer of liability 66
2. Lubricants 66
3. Delivery, returns, and storage 67
3.1. Checking the delivery 67
3.2. Return shipments 67
3.3. Storage 67
3.3.1 Lubrication units 67
3.3.2 Electronic and electrical devices 67
3.3.3 General notes 67
4. Assembly 68
4.1 Information on assembly 68
5. Commissioning 68
5.1 Commissioning 68
6. Shutdown and disposal 69
6.1 Temporary shutdown 69
6.2 Shutdown 69
7. Maintenance 70
7.1 General information 70
8. Malfunctions, causes, and remedies 72
8.1 Prior to beginning troubleshooting 72
8.2 Commissioning, product, and system malfunctions 73
9. Accessories 74
10. Spare parts 75
Operating instructions
6
EN
Possible symbols
Meaning
Note
Electrical component hazard, electric shock hazard
Slipping hazard
Hazard from hot componentsHazard from hot surface
Risk of being drawn into machinery
Crushing hazard
Danger from suspended load
Pressure injection hazard
Explosion-proof component
Electrostatic sensitive components
Wear personal safety equipment (goggles)
Secure (lock) the closing device against accidental starting of the machine
Environmentally sound disposal
Explanation of symbols and signs
Explanation of symbols and signs
You will find these symbols, which warn of
specific dangers to persons, material assets,
or the environment, next to all safety inst-
ructions in these operating instructions.
Read the instructions completely and follow
all operating instructions and the warning
and safety instructions.
Information symbols within the text
Symbol Meaning
Prompts an action
Used for itemizing
Refers to other facts, causes, or consequences
Provides additional information within procedures
Warning level Consequence Probability
DANGER Death / serious injury Immediate
WARNING Serious injury Possible
CAUTION Minor injury Possible
IMPORTANT NOTE Property damage Possible
Symbol
7
EN
Instructions placed on a unit, machine, or
equipment, such as:
o Rotation arrow
o Fluid connection labels must be followed
and kept in fully legible condition.
o Warnings
Explanation of symbols and signs
Abbreviations and conversion factors
Abbreviationsre regarding oz. ounceapprox. approximately psi pounds per square inch°C degrees Celsius hp horsepowers seconds lb. pounddB (A) sound pressure level sq.in. square inchi.e. that is kp kilopondetc. et cetera cu.in. cubic inchposs. possibly mph miles per hour< less than fpsec feet per second± plus or minus °F degrees Fahrenheit> greater than fl.oz. fluid ouncee.g. for example in. inchetc. et cetera gal. gallonØ diameterincl. including Conversion factors K Kelvin Length 1 mm = 0.03937 in.kg kilogram Area 1 cm² = 0.155 sq.in.RH relative humidity Volume 1 ml = 0.0352 fl.oz.kW kilowatt 1 l = 2.11416 pints (US)l liter Mass 1 kg = 2.205 lbsmin. minute 1 g = 0.03527 oz.max. maximum Density 1 kg/cm³ = 8.3454 lb./gal.
(US)min. minimum 1 kg/cm³ = 0.03613 lb./cu.in.mm millimeter Force 1 N = 0.10197 kpml milliliter Speed 1 m/s = 3.28084 fpsecN Newton 1 m/s = 2.23694 mphNm Newton meter Acceleration 1 m/s² = 3.28084 ft./s²
Pressure 1 bar = 14.5 psiTemperature °C = (°F-32) x 5/9Power 1 kW = 1.34109 hp
8
ENEN
1. Safety instructions
1.1 General safety instructions
The operator must ensure that the assembly
instructions/operating instructions are read
by all persons tasked with working on the
product or who supervise or instruct such
persons. The operator must also ensure that
the staff fully understands the content of the
instructions.
The assembly instructions/operating in-
structions must be kept readily available
together with the product.
Note that the assembly instructions/opera-
ting instructions form part of the product
and must accompany the product if sold to a
new owner.
The product described here was manu-
factured according to the state of the art.
Risks may, however, arise from its usage
and may result in personal injury or damage
to material assets.
Any malfunctions which may affect safety
must be remedied immediately. In addition
to the assembly instructions/operating in-
structions, statutory regulations and other
regulations for accident prevention and
environmental protection must be observed
and applied.
1.2 General behavior when handling the
product
o The product may only be used in aware-
ness of the potential dangers, in proper
technical condition, and according to the
information in this manual.
o Personnel must familiarize themselves
with the functions and operation of the
product. The specified assembly and ope-
rating steps and their sequences must be
observed.
o Any unclear points regarding proper con-
dition or correct assembly/operation must
be clarified. Operation is prohibited until
issues have been clarified.
o Unauthorized persons must be kept away
from the product.
o All safety instructions and in-house inst-
ructions relevant to the particular activity
must be observed.
o Responsibilities for different activities
must be clearly defined and observed.
Uncertainty seriously endangers safety.
o Protective and safety mechanisms must
not be removed, modified, or disabled
during operation and must be checked
for proper function and completeness at
regular intervals.
If protective and safety mechanisms
must be removed, they must be installed
immediately following conclusion of work
and checked for proper function.
1. Safety instructions
9
1
ENEN
o Any malfunctions that occur must be
resolved according to responsibility. The
supervisor must be notified immediately
in case of malfunctions outside one's
individual scope of responsibility.
o Wear personal protective equipment.
o Observe the relevant safety data sheets
when handling lubricants/equipment.
1.3 Qualified technical personnel
Only qualified technical personnel may
install, operate, maintain, and repair the
products described here.
Such persons are familiar with the relevant
standards, rules, accident prevention regu-
lations, and assembly conditions as a result
of their training, experience, and instruction.
They are qualified to carry out the required
activities and in doing so recognize and
avoid any potential hazards. The definition
of qualified personnel and the prohibition
against employing non-qualified personnel
are laid down in DIN VDE 0105 and IEC
364. Relevant country-specific definitions of
qualified technical personnel apply for coun-
tries outside the scope of DIN VDE 0105 or
IEC 364.
The operator is responsible for assigning
tasks and the area of responsibility.
The personnel must be trained and instructed
prior to beginning work if they do not pos-
sess the requisite knowledge.
Product training can also be performed by
SKF in exchange for costs incurred.
1.4 Electric shock hazard
WARNING
Electric shock
Assembly, maintenance, and re-
pair work may only be performed
by qualified technical personnel.
De-energize the product prior to
beginning work.
Local conditions for connections
and local regulations (e.g., DIN,
VDE) must be observed.
1. Safety instructions
10
ENEN
1.5 System pressure or hydraulic
pressure hazard
All relevant persons (e.g., operating personnel,
supervisors) must be informed of
the activity prior to the start of work.
Precautionary operational measures / work
instructions must be observed.
o Take appropriate measures to ensure
that moving/detached parts are immo-
bilized during the work and that no body
parts can be pinched by unintended
movements.
o Assemble the product only outside the
operating range of moving parts, at an
adequate distance from sources of heat
or cold.
o Prior to performing work, the product
and the machine/system in which the
product is integrated must be de-ener-
gized and depressurized and secured
against unauthorized activation.
o All work on electrical components may be
performed only with voltage-insulated
tools.
1.7 Assembly/maintenance/malfunction/
decommissioning/disposal
WARNING
System pressure
Hydraulic pressure
Lubrication systems are pressurized
during operation. Centralized lu-
brication systems must therefore
be depressurized before starting
assembly, maintenance, or repair
work, or any system modifications
or system repairs.
1.6 Operation
The following must be observed while wor-
king on the product.
o All information within this manual and
the information within the referenced
documents
o All laws and regulations that the operator
must observe
o The information on explosion protection
according to Directive 1999/92/EC
(ATEX 137), if necessary
1. Safety instructions
11
1
ENEN
o Fuses must not be bridged. Always replace
fuses with fuses of the same type.
o Ensure proper grounding of the product.
o Drill required holes only on non-critical,
non-load-bearing parts.
o Other units of the machine/the vehicle
must not be damaged or impaired in their
function by the installation of the centra-
lized lubrication system.
o No parts of the centralized lubrication
device may be subjected to torsion, shear,
or bending.
o Use suitable lifting gear when working
with heavy parts.
o Avoid mixing up/incorrectly assembling
disassembled parts. Label parts.
1. Safety instructions
1.8 Intended use
Intended use is the use of the RA multiline
pump for the purpose of providing centralized
lubrication.
The RA multiline pump is constructed as a
radial piston pump in a modular design. Up
to five pump elements each with one, two,
or four outlets can be “stacked” together.
The displacement of the outlets is conti-
nuously variable (stepless adjustment) from
outside.
The pump is suitable for use as a feed
pump for total loss lubrication systems or
for circulating lubrication systems with low
circulation rates (up to 30 cm3/min per
outlet) or as a multicircuit pump to supply
multiple independent lubrication zones.
Its operating pressure is max. 63 bar, with
up to 100 bar for short periods. The design
of the RA multiline pump permits it to pump
both mineral-based and synthetic-based
oils and greases.
Any other usage is deemed non-compliant
with the intended use.
1.9 Foreseeable misuse
Any usage of the product differing from
the aforementioned conditions and stated
purpose is strictly prohibited. Particularly
prohibited are:
o To supply, transport, or store hazardous
substances and mixtures in accordance
with annex I part 2-5 of the CLP regu-la-
tion (EC 1272/2008), which have been
marked with hazard pictograms GHS01-
GHS 09
o Use to feed / forward / store gases, lique-
fied gases, dissolved gases, vapors, or
fluids whose vapor pressure exceeds normal
atmospheric pressure (1013 mbar) by
more than 0.5 bar at their maximum per-
missible operating temperature
12
ENEN 1. Safety instructions
1.10 Disclaimer of liability
The manufacturer shall not be held liable
for damage resulting from:
o Failure to comply with these instructions
o The use of lubricants/media not approved
for the unit type
o Contaminated or unsuitable lubricants
o Installation of non-original SKF compo-
nents
o Inappropriate usage
o Improper assembly, coniguration, or
illing
o Improper response to malfunctions
o Non-observance of maintenance
intervals
o Independent modiication of system
components
The multiline pumps of series RA described in
these assembly instructions are not approved
for ATEX applications.
Only products tested and approved by SKF
in accordance with ATEX Directive 94/9/EC
are permitted to be used in potentially ex-
plosive atmospheres. The relevant class of
explosion protection is indicated on the
products’ rating plates.
The associated ATEX operating instructions
apply to these ATEX products.
1.12 Referenced documents
In addition to this manual, the following
documents must be observed by the res-
pective target group:
o Operational instructions/approval rules
o Instructions from suppliers of purchased
parts
o Manual for the insulation resistance
tester
o Safety data sheet of the lubricant lubricant/
equipment used
o Project planning documents and other
relevant documents
The operator must supplement these docu-
ments with applicable regulations for the
country of use. The documentation must be
included if the product is transferred to a
new operator.
1.11 Explosion protection in ATEX
13
1
ENEN1. Safety instructions
1.13 Warning labels on the product
The following warning labels are affixed
to the motor-driven RA multiline pumps.
Before commissioning, check that the labels
are present and intact. Immediately replace
warning labels if damaged or missing. The
product must not be operated until then.
See the positioning diagram for the order
number and position on the product.
Warning label, item 2Warning label, item 1
CAUTION
The direction of rotation must
match the arrow on the
multiline pump.
Order No. : 44-1826-2144
Order No. : 44-1826-2850
Positioning of warning labels, Fig. 1
Rotation arrowItem 1
Item 2
WARNING
Electric shock
Assembly, maintenance, and re-
pair work may only be performed
by qualified technical personnel.
De-energize the product prior to
beginning work.
Local conditions for connections
and local regulations (e.g., DIN,
VDE) must be observed.
0 0
10
10
1 1
Electrical component hazard, electric shock hazard
14
ENEN 1. Safety instructions
1.14 Residual risks
Residual risk Remedy
Life cycle: Assembly
Electric shock due to defective power lead/mains plug
• Inspect the power lead/mains plug for damage before starting the product.
People slipping due to floor contaminati-on with spilled/leaked lubricant
• Exercise caution when connecting the product’s hydraulic connections• Promptly apply suitable binding agents and remove the leaked/spilled lubricant.• Follow operational instructions for handling lubricants and contaminated parts.
Tearing/damage to lines when installed on moving machine components
• If possible, do not install on moving parts; If this cannot be avoided, use flexible hose lines.
Life cycle: Commissioning / operation
Electric shock due to defective power lead/mains plug
• Inspect the power lead/mains plug for damage before starting the product.
Lubricating oil spraying out due to faulty component fitting / faulty line connection
• Tighten all components securely or using the specified torques. Use hydraulic screw unions and lines suitable for the indicated pressures. These must be checked for proper connection and for damage prior to commissioning.
Life cycle: Setup, retrofit
People slipping due to floor contaminati-on with spilled/leaked lubricant
• Exercise caution when undoing or connecting the product’s hydraulic connections.• Promptly apply suitable binding agents and remove the leaked/spilled lubricant.• Follow operational instructions for handling lubricants and contaminated parts.
15
1
ENEN1. Safety instructions
Residual risk Remedy
Life cycle: Malfunction, troubleshooting, maintenance, repair
Electric shock due to defective power lead/mains plug
• Inspect the power lead/mains plug for damage before starting the product.
Electric shock from open electric motor or active energized components
Disconnect the mains plug (cut power) before performing any work on electrical components.• Exercise caution when winding and unwinding the power lead and when operating the product.
Strong heating of the electric motor due to a motor jam or continuous duty
Turn off the pump motor and let it cool down. Remedy the cause
People slipping due to floor contamination with spilled/leaked lubricant
• Exercise caution when undoing or connecting the product’s hydraulic connections.• Promptly apply suitable binding agents and remove the leaked/spilled lubricant.• Follow operational instructions for handling lubricants and contaminated parts.
Life cycle: Decommissioning, disposal
People slipping due to floor contamination with spilled/leaked lubricant
• Exercise caution when disconnecting the product’s hydraulic connections• Promptly apply suitable binding agents and remove the leaked/spilled lubricant.• Follow operational instructions for handling lubricants and contaminated parts.
Environmental contamination by lubricants and wetted parts
• Dispose of contaminated parts according to the applicable legal/company rules
16
EN 2. Lubricants
2. Lubricants
2.1 General information
Intended use is the use of the products for
the purpose of providing centralized lubri-
cation/lubrication of bearings and friction
points using lubricants within the physical
usage limits which can be found in the do-
cumentation for the devices, e.g., operating
instructions and the product descriptions,
e.g., technical drawings and catalogs.
Hazardous materials of any kind, especially
the materials classified as hazardous by CLP
Regulation EC 1272/2008 may only be used
to fill SKF centralized lubrication systems
and components and deliv-ered and/or dis-
tributed with the same after consulting with
and receiving written approval from SKF.
Selection of a lubricant suitable for the
lubrication task is made by the machine/
system manufacturer and/or the operator of
the machine/system in cooperation with the
lubricant supplier.
When selecting a lubricant, the type of bea-
rings/friction points, their expected load du-
ring operation, and the anticipated ambient
conditions must be taken into account. All
economic and environmental aspects must
also be considered.
IMPORTANT NOTE
Observe the instructions from the machine
manufacturer regarding the lubricants that
are to be used.
The amount of lubricant required at a lu-
brication point is specified by the bearing
or machine manufacturer. It must be ensu-
red that the required quantity of lubricant
is provided to the lubrication point. The
lubrication point may otherwise not receive
adequate lubrication, which can lead to
damage and failure of the bearing.
2.2 Selection of lubricants
No products manufactured by SKF Lubrication
Systems are approved for use in conjunction
with gases, liquefied gases, pressurized gases
in solution, vapors, or such fluids whose
vapor pressure exceeds normal atmospheric
pressure (1013 mbar) by more than 0.5 bar
at their maximum permissible temperature.
Other media which are neither lubricant nor
hazardous substance may only be fed after
consultation with and written approval from
SKF Lubrication Systems.
SKF Lubrication Systems considers lubricants
to be an element of system design that
must always be factored into the selection
of components and the design of centralized
lubrication systems. The lubricating proper-
ties of the lubricants are critically important
in making these selections.
IMPORTANT NOTE
All products from SKF Lubrication
Systems may be used only for their inten-
ded purpose and in accordance with the
information in the product's operating
instructions.
17
2
EN2. Lubricants
Please contact SKF Lubrication Systems
if you have further questions regarding
lubricants. It is possible for lubricants to be
tested in the company's laboratory for their
suitability for pumping in centralized lubri-
cation systems (e.g., "bleeding").
You can request an overview of the lubricant
tests offered by SKF Lubrication Systems
from the company's Service department.
The product described here can be operated
using lubricants that meet the specifications
in the technical data. Depending on the
product design, these lubricants may be oils,
fluid greases, or greases.
Mineral, synthetic, and/or and rapidly bio-
degradable oils and base oils can be used.
Consistency agents and additives may be
added depending on the operating condi-
tions.
Note that in rare cases, there may be
lubricants whose properties are within
permissible
limit values but whose other characteristics
render them unsuitable for use in centralized
lubrication systems. For example, syn-
thetic lubricants may be incompatible with
elastomers.
IMPORTANT NOTE
Only lubricants approved for the product
may be used. Unsuitable lubricants can
lead to failure of the product and to
property damage.
2.3 Approved lubricants
IMPORTANT NOTE
Different lubricants must not be mixed
together. Doing so can cause damage and
require costly and complicated cleaning
of the product/lubrication system. It is
recommended that an indication of the lu-
bricant in use be attached to the lubricant
reservoir in order to prevent accidental
mixing of lubricants.
IMPORTANT NOTE
If necessary, SKF Lubrication Systems can
help customers to select suitable compo-
nents for feeding the selected lubricant
and to plan and design their centralized
lubrication system.
18
EN 2. Lubricants
2.5 Lubricant hazards
WARNING
Lubricants
Products must always be free of
leaks. Leaking lubricant is hazar-
dous due to the risk of slipping
and injury. Beware of any lubricant
leaking out during assembly, ope-
ration, maintenance, or repair of
centralized lubrication systems.
Leaks must be sealed off without
delay.
IMPORTANT NOTE
Follow the safety instructions on the lubri-
cant's safety data sheet.
2.4 Lubricants and the environment
IMPORTANT NOTE
Lubricants can contaminate soil and wa-
terways. Lubricants must be used and
disposed of properly. Observe the local re-
gulations and laws regarding the disposal
of lubricants.
It is important to note that lubricants are
environmentally hazardous, flammable
substances which require special precauti-
onary measures during transport, storage,
and processing. Consult the safety data
sheet from the lubricant manufacturer
for information regarding transport, stora-
ge, processing, and environmental hazards
of the lubricant that will be used.
The safety data sheet for a lubricant can be
requested from the lubricant manufacturer.
Leaking lubricant is a serious hazard. Lea-
king lubricant can create risks that may re-
sult in physical harm to persons or damage
to other material assets.
19
3
2
EN3. Overview/functional description
3. Overview/functional description
Rotary drive, coaxial
1.1 1.2 1.41.3
Item Description
1 Radial piston pump
1.1 Initial section
1.2 Pump element
1.3 Sealing cap
1.4 Tie-rod with cap nut
2 Terminal box
3 Electric motor
4 Fill level switch
5 Grease reservoir
6 Bevel gear
7 Oil reservoir
Radial piston pumps
Rotary drive -Chapters 4.3.1 to 4.3.3
Electric motor drive,
coaxial -Chapters 4.4 to 4.6
Rotary drive with bevel gear
and reservoir (grease)
-Chapters 4.7 to 4.9
Electric motor drive with
oil reservoir unit -Chapter 4.10
Electric motor drive, coaxial
Rotary with bevel gear, with grease reservoir Electric motor drive, with oil reservoir
01
01
01
01
01
0 01
0 01
0
1 1 1
0 0
10
10
1 1
2 3
1
1
1
00 1
00 1
00 1
0 0
10
10
1 1
4
5
6
7
1
1
1
132
3.1 Assemblies
20
EN 3. Overview/functional description
In its basic design, the RA multiline pump is
comprised of a drive, spacer ring with the
lubricant inlet, at least one pump element,
and a cap.
The pump element shown in Figure 2 in its
pressure phase is comprised of the pump
ring (1), the pump shaft (2) with the two
radial pump pistons (3) and the track ring
with elliptical inner contour (4), which is
permanently joined to the adjusting plate
(5). The pump ring (1) houses the suction
grooves and the pressure bores. The pump
shaft, which also acts as the drive shaft for
the next pump element via the embedded
coupling, is designed as a rotary valve.
The two pump pistons are pressed against
the inner side of the track ring by the spring
(6).
As the pump shaft turns, the two pump pis-
tons move apart due to the spring loading,
until the outer dead center is reached.
3.2 Functional description 3.3 Mode of operation
The RA multiline pump is constructed as a
radial piston pump in a modular design. Up
to five pump elements each with
one, two, or four outlets can be stacked to-
gether so that the number of outlets can be
adapted to current requirements in the best
possible way.
The simple stacking design also enables
subsequent expansion or reduction of the
number of pump outlets.
The displacement of a pump element's
outlets is continuously variable (stepless
adjustment) from outside. Continuous vari-
ability and a wide speed range guarantee an
extremely broad range of delivery rates.
This also makes the pump highly attractive
as a feed pump for total loss lubrication sys-
tems or for circulating lubrication systems
with low circulation rates (up to 30 cm3/min
per outlet) or as a multicircuit pump to sup-
ply multiple independent lubrication zones.
The pump can, following changeover of the
adjusting plate, be driven in either direction
of rotation as desired.
Its operating pressure is max. 63 bar, with
up to 100 bar for short periods.
The design of the RA multiline pump per-
mits it to pump both mineral-based and
synthetic-based oils and greases.
)See Figure 2
21
3
EN3. Overview/functional description
Until the outer dead center is reached, the
control bore in the pump shaft connects the
space between the two pump pistons with a
lubricant inlet in the spacer ring. This is the
suction phase. Due to the elliptically shaped
track ring, the pump pistons move together
against the spring force as the pump shaft
continues to turn, until the inner dead center
is reached. Until the inner dead center is
reached, the control bore in the pump shaft
connects the space between the two pump
pistons with a lubricant outlet in the pump
ring. This is the pressure phase.
The displacement can be varied continuously
(steplessly) with the adjusting plate using
the phase control method, meaning that the
track ring position is changed relative to the
position of the control
bore in the pump shaft. The stroke of the
two pistons remains the same in every phase
variation; it is fully effective or only partially
effective, depending on the setting.
Pump element in the pressure phase, Fig. 2
3
4 / 5
2
6
1
Spacer ring
Drive
Cap
Pump element
Tie-rods with cap
nut
Outlet
Pump ring
Pump shaft
Spring
Track ring/
adjusting plate
Pump pistons
Inlet
22
4. Assembly
IMPORTANT NOTE
Observe the technical data (Chapter 9).
Only qualified technical personnel may
install, operate, maintain, and repair the
multiline pump units of series RA described
in the assembly instructions. Qualified
technical personnel are persons who have
been trained, assigned, and instructed by
the operator of the final product into which
the multiline pump units described here are
incorporated.
Such persons are familiar with the relevant
standards, rules, accident prevention regu-
lations, and operating conditions as a result
of their training, experience, and instruction.
They are qualified to carry out the required
activities and in doing so recognize and
avoid potential hazards.
The definition of qualified personnel and the
prohibition against employing non-qualified
personnel are laid down in DIN VDE 0105
and IEC 364.
Before assembling/setting up the product,
remove the packaging material and any
shipping braces (e.g., plugs).
The packaging material must be preserved
until any discrepancies are resolved.
4.1 General information
CAUTION
Personal injury/property damage
Do not tilt or drop the product.
The product should be protected from
humidity and vibration, and should be
mounted so that it is easily accessible,
allowing all further installation work to be
done without difficulty. Make sure there is
adequate air circulation to prevent the com-
ponent from overheating. For the maximum
permissible ambient temperature, see
"Technical data."
The mounting position of the product is as
shown in the assembly drawing.
4.2 Setup and attachment
EN
CAUTION
Personal injury/property damage
Drill assembly holes in such a way
that no lines, units, or moving
parts are damaged or their func-
tion impaired. Maintain safety
clearances and comply with regu-
lations for assembly and accident
prevention.
4. Assembly
23
4
During assembly and especially when drilling,
always pay attention to the following:
o Existing lines must not be damaged.
o Other units must not be damaged.
o The product must not be installed within
range of moving parts.
o The product must be installed at an ade-
quate distance from sources of heat or
cold.
o Maintain safety clearances and comply
with regulations for assembly and accident
prevention.
Install the pump on a flat surface or flange.
The pump must not be under stress.
RA multiline pumps are designed to deliver
low to minimal volumetric flows. They the-
refore have very limited suction performance
compared with pumps with larger volumetric
flows. When designing the system/machine,
the RA multiline pump should be installed
below the oil level or oil feed line. This sup-
ports the pump’s self-venting properties
and prevents dry running as well as prema-
ture wear.
At the same time, ensure that the suction
lines do not extend to the lowest point of the
oil reservoir. Under no circumstances may
any existing oil sump be drawn in.
To prevent the RA multiline pump from run-
ning dry, SKF recommends a fill level control
with a minimum switching point.
This fill level switch can optionally be sup-
plemented with a customer-provided timer
that shuts down the system if the fill level
drops too low.
Installation examples, Fig. 3
EN4. Assembly
0 0
10
10
1 1
0 0
10
10
1 1
0 0
10
10
1 1
RA, self-priming
Attachment scale
optimal
good
acceptable
poor
Min. ill level
Vent
Filler socket with microilter strainer
24
RA multiline pump, rotary drive, coaxial, Fig. 4
4.3 Oil lubrication pumps/oil lubrication pump units - Port dimensions, assembly holes, and minimum mounting dimensions
Minimum mounting dimensions
A =Ultimate length: X + 20 mmB = Installation clearance Ø 100 mm
4.3.1 Rotary drive, coaxial
31
21
A
B
B
Ø11 f7
Ø30 h9
IIIV
Ø54
I III
42
M6
Ø15,2
9
01
01
8
01
01
01
01
00
1
00
1
53 27 27 27 27 28,5
32,5
12,5
4h9
Inlet G 1/8" Outlet G 1/8"
Section B-B View A
Positioning of outlets I to IV
01
01
01
Ø B
A
Drawing of a pump element with 4 outlets, with the outlets arranged at angles of 45° to each other
X = 112.5 (1 element) to 220.5 (5 elements)
EN 4. Assembly
25
4
Technical data for Fig. 4
General Mounting position Any Ambient temperature - 15 °C to +80 °C
Pump Type Radial piston pump Operating pressure 63 bar 1) Short-term pressure 100 bar Number of stackable pump elements Max. 5 Outlet ports per pump element 1, 2, or 4 Displacement adjustment per pump element Continuously variable Displacement per outlet and revolution of the pump shaft Max. 0.02 cm3 Drive speed 10 to 1500 rpm Direction of rotation Clockwise or coun-terclockwise 2) Lubricant Mineral oils 3) Lubricant temperature range -15°C to +80°C Operating viscosity 25 to 2500 mm2/s Suction head 500 mm Intake pipe inside diameter ≥ 4 mmWeight of pump elements Element 1: 2.74 kg, 2: 1.59 kg, 3: 1.97 kg, 4: 2.36 kg, 5: 2.74 kg
1) For max. operating pressure, see displacement chart, Fig. 20, page 602) Standard: clockwise
Explanation of order codes for Fig. 4
RA 1UA 00 / 44 21 R 0001
Type Radial piston pump RA
Drive 1UA = Rotary, coaxial
Step-down ratio 00 = 1:1
Number of outlet ports per pump element 1 = 1 outlet 2 = 2 outlets 4 = 4 outlets 1 to 5 pump elements (counted from drive)
Direction of rotation R = Standard: clockwise L = counterclockwise
Design key 0001
Pump element 1
Pump element 5
EN4. Assembly
26
12,5
4h9
Ø54
Ø70
I
IV
III
II
60
ba
A
31 x
Ø38 h9
217
31
Ø15,2
1 1
0,3
10,3
1
0,3
0,3
1 1
27 27 55,828,5
0,3
0,3
B
B
RA multiline pump, rotary drive with coaxial gear, Fig. 5
Minimum mounting dimensions
A = Ultimate length: 31 mm+X+55.8+50 mmB = Installation clearance 100 mmC = Installation clearance with cap prelubrication 250 mm
4.3.2 Rotary drive with coaxial gear
Inlet G 1/8" Outlet G 1/8"
View B-B
M6/15 deep
View A
Positioning of outlets I to IV
Inlet
Drawing of a pump element with 4 outlets, with the outlets arranged at angles of 45° to each othera b
Step-down ratio
52.5 21 5:1
62.5 21 15:1
63.5 20.5 25:1
73.5 20.5 75:1
73.0 21 125:1
Ø B
A
Ø C
C
1 1
0,3
10,3
1
0,3
0,3
1 10,3
0,3
View C
Risk of injury! Remove hand crank after
prelubrication.
EN 4. Assembly
27
4
Technical data for Fig. 5
For general technical data, see page 25,“Technical data for Fig. 4.”
Pump Drive speed Up to 3600 rpmStep-down ratio of coaxial gear 5:1, 15:1, 25:1, 75:1, 125:1
Weight of pump elements: 1) Element 1: 2.24 kg Element 2: 2.63 kg Element 3: 3.01 kg Element 4: 3.40 kg Element 5: 3.78 kg
1) The total weight of the pump is increased by 0.1 kg with cap prelubrication. For the design with cap prelubrication, the hand crank is included in the scope of delivery with the pump.
Explanation of order codes for Fig. 5
RA 2UB 15 / 442 D R 0001
Type Radial piston pump RA
Drive 2UB = Rotary with coaxial gear
Step-down ratio 05 = 5:1 15 = 15:1 25 = 25:1 75 = 75:1 13 = 125:1
Number of outlet ports per pump element 1 = 1 outlet 2 = 2 outlets 4 = 4 outlets 1 to 5 pump elements (counted from drive)
Cap prelubrication
D = With cap prelubrication (direction of rotation can only be set to clockwise)
/ = Without cap prelubrication
Direction of rotation R = Standard: clockwise L = counterclockwise
Design key 0001
Pump element 1
Pump element 5
EN4. Assembly
28
RA multiline pump, rotary drive with bevel gear, Fig. 6
4.3.3 Rotary drive with bevel gear
Inlet G 1/8" Outlet G 1/8"
Drive position B
Drive position A
Section A-AMinimum mounting dimensions
A =Ultimate length: 100 mmB = Installation clearance x + 30 mmC = Width 130 mm
A
BB
IVII
III I
C
0,31
0,31
0,31
0,31
0,31
0,31
0,31
0,31
0,31
0,31
0,31
0,31
22
IV
II
III
Ø11
16
f7
I
20
8
60
105
9057,8
Ø54
2727 28,58,5
13,5
22,8
78,3
A A
12,5
4h9
45 45
X (106.8 (1 element) to 241.8 (5 elements))
EN 4. Assembly
29
4
Technical data for Fig. 6
For general technical data, see page 25,“Technical data for Fig. 4.”
Pump Weight of pump elements: 1) Element 1: 1.69 kg Element 2: 2.07 kg Element 3: 2.46 kg Element 4: 2.84 kg Element 5: 3.23 kg
GearboxDrive position A or BStep-down ratio 10.5:1
Explanation of order codes for Fig. 6
RA 3UA 01 A 42441 R 0001
Type Radial piston pump RA
Drive 3UA = Rotary with bevel gear
Step-down ratio 01 = 10.5:1
Drive position A or B
Number of outlet ports per pump element 1 = 1 outlet 2 = 2 outlets 4 = 4 outlets 1 to 5 pump elements (counted from drive)
Direction of rotation R = Standard: clockwise L = counterclockwise
Design key 0001
Pump element 1
Pump element 5
EN4. Assembly
30
RA multiline pump, electric motor drive, coaxial, Fig. 7
4.3.4 Electric motor drive, coaxial
20,5 28,580
96
120
100
100
Ø 54
125
63
8Ø7 40
27
15
163,5
127,5
0,3
10,3
1
0,3
10,3
1
II
IV
III
I
Inlet G 1/8" Outlet G 1/8"
View A
Terminal box
View A Positioning of
outlets I to IV
A
BC
D
0,3
10
,31
0,3
10
,31
Minimum mounting dimensions
A = Ultimate length: x+ 20 mmB = Installation clearance: 135mmC = Width: 200 mm D = Fan clearance: 15 mm
X (316 (1 element) to 424 (5 elements))
EN
IMPORTANT NOTE! To prevent air from accumulating at the fan, a clearance “D” of 15 mm must be provided.
4. Assembly
31
4
Technical data for Fig. 7
For general technical data, see page 25,“Technical data for Fig. 4.”
Pump Displacement per outlet and motor speed of 1360 rpm approx. 27.2 cm3/min Direction of rotation -see direction arrow
Weight of pump elements: Element 1: 7.05 kg, 2: 7.44 kg, 3: 7.82 kg, 4: 8.21 kg, 5: 8.59 kgMotorType/size IM B34/63 C90Type of voltage 3-phase AC voltageWeight 5.2 kg
Motor characteristics
Speed Frequency Rated
output
Rated
voltage
Rated
current
Order
code
[rpm] [Hz] [kW] [V] [A]
1500 50 0.18 230/400 1.13/0.65 AF1500 50 0.18 290/500 0.90/0.52 AK1500 50 0.18 400/690 0.65/0.38 AO
NoteThe motor specifications refer to three-phase motors from VEM. There may be differences with motors from other manufacturers.
Explanation of order codes for Fig. 7
RA 1M 00 / 44421 0001 AF 07
Type Radial piston pump RA
Drive 1M = Electric motor, coaxial
Step-down ratio 00 = 1:1
Number of outlet ports per pump element 1 = 1 outlet 2 = 2 outlets 4 = 4 outlets 1 to 5 pump elements (counted from drive)
Design key 0001
Motor order code AF, AK, AO (motor ratings)
Motor protection class 07 = Protection class IP55 (EEx design on request)
Pump element 1
Pump element 5
EN4. Assembly
32
RA multiline pump, electric motor drive with coaxial gear, Fig. 8
4.3.5 Electric motor drive, with coaxial gear
Minimum mounting dimensions
A = Ultimate length: x +30 mmB = Installation clearance: 150 mmC = Width: 200 mmD = Fan clearance: 15 mm
IMPORTANT NOTE! To prevent air from accumu-lating at the fan, a clearance “D” of 15 mm must be provided.
II
��
���
I
125
Ø54
80Ø7
8
63
Ø15,2
A
B160
0,31
0,31
96
120
100
100
0,31
0,31
0,31
0,31
27 27 28,5
x
Outlet G 1/8"
A
View A
Positioning of outlets I to IV
Inlet G 1/8"
AB
CD
0,31
0,31
The total weight of the pump is increased by 0.1 kg with cap prelubrication. For the design with cap prelubrication, the hand crank is included in the scope of delivery with the pump.
Risk of injury! Remove hand crank after prelubrication.
EN 4. Assembly
33
4
Technical data for Fig. 8
For general technical data, see page 25,“Technical data for Fig. 4.” PumpWeight of pump elements: Element 1: 7.05 kg, 2: 7.44 kg, 3: 7.82 kg, 4: 8.21 kg, 5: 8.59 kg
Displacement per outlet and motor speed of 1360 rpm
Step- down ratio
Length
A
Length
B
Displacement Operating pressure,
max.
[mm] [mm] [cm³/min] [bar]
5:1 110.5 131.5 Approx. 1.8 to approx. 5.44 63
15:1 120.5 141.5 Approx. 0.6 to approx. 1.81 63
25:1 120.5 141.5 Approx. 0.36 to approx. 1.09 50
75:1 131 152 Approx. 0.12 to approx. 0.36 20
125:1 131 152 Approx. 0.07 to approx. 0.21 10
Speed Frequency Rated
output
Rated
voltage
Rated
current
Order
code
[rpm] [Hz] [kW] [V] [A]
1500 50 0.18 230/400 1.13/0.65 AF1500 50 0.18 290/500 0.90/0.52 AK1500 50 0.18 400/690 0.65/0.38 AO
NoteThe motor specifications refer to three-phase motors from VEM. There may be differences with motors from other manufacturers.
Explanation of order codes for Fig. 8
RA 2M 15 / 421 D R 0001 AF 07
Type Radial piston pump RA
Drive 2M = Electric motor with coaxial gear
Step-down ratio 05 = 5:1, 15 = 15:1, 25 = 25:1, 75 = 75:1, 13 = 125:1
Number of outlet ports per pump element 1 = 1 outlet 2 = 2 outlets 4 = 4 outlets 1 to 5 pump elements (counted from drive)
Cap prelubrication D = With cap prelubrication (direction of rotation can only be set to clockwise)
/ = Without cap prelubrication
Direction of rotation R = Standard: clockwise
Design key 0001
Motor order code AF, AK, AO (motor ratings)
Motor protection class 07 = Protection class IP55
Pump element 1
Pump element 5
EN4. Assembly
34
RA multiline pump, electric motor drive with bevel gear, Fig. 9
4.3.6 Electric motor drive with bevel gear
Terminal box
Minimum mounting dimensions
A = Ultimate length: 300 mmB = Installation clearance: 200 mmC = Width: 150 mmD = Fan clearance: 15 mm
IMPORTANT NOTE! To prevent air from accumulating at the fan, a clearance “D” of 15 mm must be provided.
30120
120
100
100
96270
4080
22,8
IV
II
I
III
125
63
8
Ø7
15
100,5
20,5
27
0,3 10,31
0,3 10,31
Inlet G 1/8"
Outlet G 1/8"
Positioning of outlets I to IV
0,3 10,31
0,3 10,31
A
BC
D
EN 4. Assembly
35
4
Technical data for Fig. 9
For general technical data, see page 25,“Technical data for Fig. 4.”
Pump Displacement per outlet and motor speed of 1360 rpm approx. 2.59 cm3/min
Direction of rotation -see direction arrowWeight of pump elements: Element 1: 6.90 kg, 2: 7.28 kg, 3: 7.67 kg, 4: 8.05 kg, 5: 8.44 kg
MotorType/size IM B34/63 C 90Type of voltage 3-phase AC voltage
Motor characteristics
Speed Frequency Rated
output
Rated
voltage
Rated
current
Order
code
[rpm] [Hz] [kW] [V] [A]
1500 50 0.18 230/400 1.13/0.65 AF1500 50 0.18 290/500 0.90/0.52 AK1500 50 0.18 400/690 0.65/0.38 AO
NoteThe motor specifications refer to three-phase motors from VEM. There may be differences with motors from other manufacturers.
Explanation of order codes for Fig. 9
RA 3M 01 / 44421 / 0001 AF 07
Type Radial piston pump RA
Drive 3M = Electric motor with bevel gear
Step-down ratio 01 = 10.5:1
Number of outlet ports per pump element 1 = 1 outlet 2 = 2 outlets 4 = 4 outlets 1 to 5 pump elements (counted from drive)
Design key 0001
Motor order code AF, AK, AO (motor ratings)
Motor protection class 07 = Protection class IP55 (EEx design on request)
Pump element 1
Pump element 5
EN4. Assembly
36
RA multiline pump unit with 3-liter lubricant reservoir, Fig. 10
4.4 RA multiline pump units for oil with 3-, 7-, or 15-liter reservoir
80
20,5
17,5
22,8
22
37,5
Ø54
27
27
27
27
28,5
Ø54
L 55,8
87,5
AØ54
2720,5 27 2727 28,5
II
IV
III
I
63
110140
315
Ø6,4
100
110
26,5
13,5250178
~333
220
63
205
1M
2M
3M
B
C
A
X
X
X
4.4.1 RA multiline pump units with 3-liter reservoir
Terminal box
Inlet G 1/8"
Positioning of outlets I to IV
Outlet G 1/8"
Risk of injury! Remove hand crank after prelubrication.
Filler socket
Fill level switch
With oil return
G 3/8" on request
Outlet G 1/8"
View A
Minimum mounting dimensions
A = Ultimate length: M1 270 + X +50 mm M2 270 + L + X + 100 mm M3 270 + 107 + 50 mmB = Installation clearance: M1 350 mm M2 350 mm M3 178 + 63 + 37.5 + X + 50 mmC = Width: 160 mm
Suction port
EN 4. Assembly
37
4
RA multiline pump unit with 7-liter lubricant reservoir, Fig. 11
80
20,5
17,5
22,8
22
37,5
Ø54
27
27
27
27
28,5
Ø54
L 55,8
87,5
AØ54
2720,5 27 2727 28,5
II
IV
III
I
1M
2M
3M
B
C
A
Ø10
245
~420
83
53
151
3
286
100
300
320
8
65
X
X
X
4.4.2 RA multiline pump units with 7-liter reservoir
Terminal box
Inlet G 1/8"
Positioning of outlets I to IV
Outlet G 1/8"
Risk of injury! Remove hand crank after prelubrication.
Filler socket
Fill level switch
With oil return
G 3/8" on request
Outlet G 1/8"
View A
Minimum mounting dimensions
A = Ultimate length: M1 286 + 87.5 + X + 50 mm M2 286 + L + X + 100 mm M3 286 + 107 mmB = Installation clearance: M1 450 mm M2 450 mm M3 245 + 83 + 37.5 + X + 50 mmC = Width: 170 mm
Suction port
EN4. Assembly
38
RA multiline pump unit with 15-liter lubricant reservoir, Fig. 10
80
20,5
17,5
22,8
22
37,5
Ø54
27
27
27
27
28,5
Ø54
L 55,8
87,5
AØ54
2720,5 27 2727 28,5
II
IV
III
I
1M
2M
3M
B
C
A
411
256
270
63
288
80192
48
366
145
X
X
X
4.4.3 RA multiline pump units with 15-liter reservoir
Terminal box
Inlet G 1/8"
Positioning of outlets I to IV
Outlet G 1/8"
Risk of injury! Remove hand crank after prelubrication.
Filler socket
Fill level switchWith oil return
G 3/8" on request
Outlet G 1/8"
View A
Minimum mounting dimensions
A = Ultimate length: M1 373.5 + X +50 mm M2 286 + L + X + 100 mm M3 393 +50 mmB = Installation clearance: M1 450 mm M2 450 mm M3 340 + X +50 mmC = Width: 300 mm
Suction port
EN 4. Assembly
39
4
Technical data for Figs. 10 to 12
General Mounting position HorizontalAmbient temperature –15 to +60°CFilling Via filler capFill level control With or without fill level switch
Pump Type Radial piston pumpOperating pressure See Fig. 21, page 61
Short-term pressure 100 barNumber of combinable pump elements Max. 5Outlets per pump element 1, 2, or 4Displacement adjustment per pump element Continuously variableDisplacement per outlet and motor speed of 1360 rpm † see table of step-down ratios
Lubricant Lubricant Mineral oil/ synthetic lubricants Temperature range –15 to +80°COperating viscosity 25 to 2500 mm2/s
MotorType/size IM B34/63 C 90Type of voltage 3-phase AC voltage
Technical data for Figs. 10 to 12
Gearbox Step-down ratio 1:1; 5:1; 10.5:1; 15:1; 25:1; 75:1; 125:1Reservoir Capacity 3, 7, or 15 litersDesign for 3 and 7 liters Polyamide, transparentDesign for 15 liters Aluminum
1) For synthetic lubricants on request.
EN4. Assembly
40
Motor ratings for Figs. 10 to 12
Speed Frequency Rated
output
Rated
voltage
Rated
current
Order
code
[rpm] [Hz] [kW] [V] [A]
1500 50 0.18 230/400 1.13/0.65 AF
1500 50 0.18 290/500 0.90/0.52 AK
1500 50 0.18 400/690 0.65/0.38 AO
NoteThe motor specifications refer to three-phase motors from VEM. There may be differences with motors from other manufacturers.
Step-down ratios for Figs. 10 to 12
Step-down ratio Length L Displacement Operating pressure per outlet, max. max. 1) [mm] [cm3/min] [bar]
1:1 87.5 approx. 27.2 635:1 110.5 approx. 5.44 6310.5:1 – approx. 2.59 6315:1 120.5 approx. 1.81 6325:1 120.5 approx. 1.09 5075:1 131 approx. 0.36 20125:1 131 approx. 0.22 10
1) See Fig. 21, page 61
Weights for Figs. 10 to 12
Description Weight [kg]
Motor 5.203 liter reservoir 1.70 7 liter reservoir 2.76 15 liter reservoir 8.00
Pump design Drive type 1M 1.48 Drive type 2M 2.76 Drive type 3M 1.33
per pump element 0.385
Cap prelubrication 0.10
Fill level switch 0.135
EN 4. Assembly
41
4
Explanation of order codes for Figs. 10 to 12
RAB 07 V 1M 00 / 2 1 4 2 4 / 0001 AF 07Type
Radial piston pump RA installed on reservoir
Reservoir capacity 03 = 3 liters; 07 = 7 liters; 15 = 15 liters
Fill level switch X = None;
V = With fill level switch for min. (reed contact)
Drive type 1M= Electric motor, coaxial; 2M= Electric motor, with coaxial gear;
3M = Electric motor, with bevel gear
Step-down ratio 00 = 1:1 (1M); 01 = 10.5:1 (3M); 05 = 5:1 (2M); 15 = 15:1 (2M); 25 = 25:1 (2M); 75 = 75:1 (2M); 13 = 125:1 (2M)
Attachment location A = On right side of reservoir (3M pump pointing upwards), / = On right side of reservoir (1M, 2M, 3M)
Number of outlet ports per pump element 1 = 1 outlet; 2 = 2 outlets; 4 = 4 outlets 1 to 5 pump elements (counted from drive)
Cap prelubrication D = With cap prelubrication, direction of rotation can only be set to clockwise (2M);
/ = None (1M, 2M, 3M)
Design key 0001
Motor order code AF, AK, AO(motor ratings table)
Motor protection class 07 = Protection class IP55 (EEx design on request)
Pump element 5
Pump element 1
EN4. Assembly
42
RA multiline grease lubrication pump, rotary drive, with bevel gear and grease reservoir, Fig. 13
4.5.1 Rotary drive, with bevel gear and grease reservoir
Outlet G 1/8"
Positioning of outlets I to IV
4.5 Grease lubrication pump port dimensions, assembly holes, and minimum mounting dimensions
II
IVf7
20
Ø11
22
7,5
8,5
III
I
105
90
0,1
25
+
47,8
-
78,5
Ø 60
8
B
Ø 54
27
27
53
15
13
Ø 160
12,5
4h9
A
A
0,3 10,31
0,3 10,31
0,3 10,31
D
Aca. 432
B
Shown transposed by 90°
Filler socket 3/8”
PG 11 Drive position A Drive position B
Appro
x. 3
97 (2 k
g re
serv
oir)
Appro
x. 1
83.5
(2 k
g re
serv
oir)
Appro
x. 4
32 (4.5
kg
rese
rvoi
r)
Appro
x. 2
58.5
(4.5
kg
rese
rvoi
r)
Section A-A
View B
Minimum mounting dimensions
A = Ultimate length: 150 mmD = Installation clearance: Ø 200 mm
EN 4. Assembly
43
4
Technical data for Fig. 13
For general technical data, see page 25,“Technical data for Fig. 4.”ReservoirReservoir capacity 2 or 4.5 kgFilling From above (through reservoir cap) or via filler socket Fill level control With or without fill level switch
Pump Number of stackable pump elements Max. 3 Drive speed 100 to 1800 rpmDirection of rotation Drive position A, counterclockwise Drive position B, clockwiseLubricant oil Greases based on mineral Synthetic greasesPenetration as per NLGI ≤2
GearboxStep-down ratio 10.5:1Drive position A or B
Weight for 4.5 kg reservoir with pump element 1) 1: 6.11 kg 2: 6.50 kg 3: 6.88 kg
1) Weight is reduced by 300 g with a 2 kg reservoir.
Explanation of order codes for Fig. 13
RA 20 F 3UA 01 B 442 / 0001
Type Radial piston pump RA
Reservoir capacity 20 = 2 kg; 45 = 4.5 kg
Fill level switch X = None; E = With 1 switching point; F = With 2 switching points (see page 55)
Drive 3UA = Rotary with bevel gear
Step-down ratio 01 = 10.5:1
Drive position A or B
Number of outlet ports per pump element 1 = 1 outlet 2 = 2 outlets 4 = 4 outlets 1 to 3 pump elements (counted from drive)
Design key 0001
Pump element 1
Pump element 3
EN4. Assembly
44
D
A
B
120
100
96
100
863
125
Ø7
80
53
15
13
Ø 160
0,310,31
Electric motor drive, with coaxial gear and grease reservoir, Fig. 14
4.5.2 Electric motor drive, with coaxial gear and grease reservoir
Minimum mounting dimensions
A = Ultimate length: 150 mmD = Clearance 200 mm
Outlet G 1/8"
Shown transposed by 90°
Filler socket 3/8”
PG 11
View B
L2 (2 k
g re
serv
oir)
L3 (4.5
kg
rese
rvoi
r)
183.5
(2 k
g re
serv
oir)
258.5
(4.5
kg
rese
rvoi
r)
View A
A
B
Displacement
Step-downratio Length L1 Length L2 Length L3 Displacement [mm] [mm] [mm] [cm³/min]
5:1 171.5 444 519 approx. 1.63 to 4.89
15:1 181.5 454 529 approx. 0.54 to 1.62
25:1 181.5 454 529 approx. 0.32 to 0.97
75:1 192 464.5 539.5 approx. 0.10 to 0.32
125:1 192 464.5 539.5 approx. 0.06 to 0.19
L1
EN 4. Assembly
45
4
Technical data for Fig. 14
For general technical data, see page 25,“Technical data for Fig. 4.”General Reservoir capacity 2 or 4.5 kg 1)Mounting position verticalAmbient temperature –15 to +60°CFilling From above (through reservoir cap) or via filler socket
Fill level control With or without fill level switch
Pump Type Radial piston pumpOperating pressure 63 barShort-term pressure 100 barNumber of combinable Pump elements Max. 3Outlets per pump element 1, 2, or 4Displacement adjustment pump element Continuously variableDisplacement per outlet and motor speed of 1360 rpm see displacement table, page 44
Lubricant Greases based on mineral oilTemperature range –15 to +80°CPenetration as per NLGI ≤2 2
1) Weight is reduced by 300 g with a 2 kg reservoir.
Technical data for Fig. 14
Motor Type/size IM B34/63 C 90Type of voltage 3-phase AC voltageGearbox Step-down ratio 5:1; 15:1; 25:1; 75:1; 125:1
Weight for 4.5 kg reservoir with pump element 2) 1: 2.77 kg; 2: 13.15 kg; 3: 13.54 kg
Motor ratings for Fig. 14
Speed Frequency Rated
output
Rated
voltage
Rated
current
Order
code
[rpm] [Hz] [kW] [V] [A]
1500 50 0.18 230/400 1.13/0.65 AF
1500 50 0.18 290/500 0.90/0.52 AK
1500 50 0.18 400/690 0.65/0.38 AO
NoteThe motor specifications refer to three-phase motors from VEM. There may be differences with motors from other manufacturers.
EN4. Assembly
46
Explanation of order codes for Fig. 14
RA 20 F 2M 05 / 442 / 0001 AF 07
Type Radial piston pump RA
Reservoir capacity 20 = 2 kg; 45 = 4.5 kg
Fill level switch X = None; E = With 1 switching point; F = With 2 switching points (see page 55)
Pump element 1
Drive 2M =Electric motor with coaxial gear
Step-down ratio 05 = 1:115 = 15:1; 25 = 25:1; 75 = 75:1; 13 = 125:1
Number of outlet ports per pump element 1 = 1 outlet; 2 = 2 outlets; 4 = 4 outlets; 1 to 3 pump elements (counted from drive)
Design key 0001
Motor order code AF, AK, AO (for motor ratings, see motor ratings table)
Motor protection class 07 = Protection class IP55 (EEx design on request)
Pump element 1
EN 4. Assembly
47
4
C
B
10
0
325270
12
0
10
0
8096
40
8
Ø7 120
63
12
5
IIIII
IVI
22
,8
12
12
72
7
Ø 160
0,3 10,31
0,3 10,31
0,3 10,31
AD
53
15
15
Electric motor drive, with bevel gear and grease reservoir, Fig. 15
4.5.3 Electric motor drive, with bevel gear and grease reservoir
Minimum mounting dimensions
A = Clearance: 400 mmB = Ultimate length: 4.5 kg reservoir 700 mm 2 kg reservoir 500 mmC = Clearance: 200 mmD = Clearance: ≥15 mm
Outlet G 1/8"
Shown transposed
by 90°
Filler socket 3/8”
PG 11
441.5
(2
kg
rese
rvoi
r)
516.5
(4.5
kg
rese
rvoi
r)
183.5
(2 k
g re
serv
oir)
258.5
(4.5
kg
rese
rvoi
r)
View A
IMPORTANT NOTE! To prevent air from accumulating at the fan, a clearance “D” of 15 mm must be provided.
EN4. Assembly
48
Technical data for Fig. 15
For general technical data, see page 25,“Technical data for Fig. 4.”General Reservoir capacity 2 or 4.5 kg 1)Mounting position verticalAmbient temperature –15 to +60°CFilling From above (through reservoir cap) or via filler socket
Fill level control With or without fill level switch
Pump Type Radial piston pumpOperating pressure 63 barShort-term pressure 100 barNumber of combinable Pump elements Max. 3Outlets per pump element 1, 2, or 4Displacement adjustment pump element Continuously variableDisplacement per outlet and motor speed of 1360 rpm approx. 2.33 cm3/min
Lubricant Greases based on mineral oil Synthetic greasesTemperature range –15 to +80°CPenetration as per NLGI ≤2 2
1) Weight is reduced by 300 g with a 2 kg reservoir.
Technical data for Fig. 15
Motor Type/size IM B34/63 C 90Type of voltage 3-phase AC voltage
Gearbox Step-down ratio 10.5:1
Weight for 4.5 kg reservoir with pump element 2) 1: 11.37 kg 2: 11.76 kg 3: 12.14 kg
Motor ratings for Fig. 15
Speed Frequency Rated
output
Rated
voltage
Rated
current
Order
code
[rpm] [Hz] [kW] [V] [A]
1500 50 0.18 230/400 1.13/0.65 AF
1500 50 0.18 290/500 0.90/0.52 AK
1500 50 0.18 400/690 0.65/0.38 AO
NoteThe motor specifications refer to three-phase motors from VEM. There may be differences with motors from other manufacturers.
EN 4. Assembly
49
4
Explanation of order codes for Fig. 15
RA 20 F 3M 05 / 442 / 0001 AF 07
Type Radial piston pump RA
Reservoir capacity 20 = 2 kg; 45 = 4.5 kg
Fill level switch X = None; E = With 1 switching point; F = With 2 switching points (see page 55)
Pump element 1
Drive 3M = Electric motor with bevel gear
Step-down ratio 01 = 10.5:1
Number of outlet ports per pump element 1 = 1 outlet; 2 = 2 outlets; 4 = 4 outlets; 1 to 3 pump elements (counted from drive)
Design key 0001
Motor order code AF, AK, AO (for motor ratings, see motor ratings table)
Motor protection class 07 = Protection class IP55 (EEx design on request)
Pump element 1
EN4. Assembly
50
IMPORTANT NOTE
Personal injury/property damage
Drill assembly holes in such a way
that no lines, units, or moving
parts are damaged or their function
impaired. Maintain safety clea-
rances and comply with regula-
tions for assembly and accident
prevention.
4.6 Assembly of the RA multiline pump 4.6.1 Rotary multiline pump
• Carefully prepare the flanging surface
and assembly holes (2x Ø 6.5 mm) for the
respective RA pump.
• Set up the customer-provided adapter
(coupling) according to the shaft extensi-
ons of the RA pump.
• Clean the flanging surface.
)During subsequent assembly, it must be
possible to fit the shaft extension of the
RA pump into the coupling part (provided
by customer) without difficulty.
The mounting surface for the multiline
pump must be free of dust particles, machi-
ning chips, rust, and paint residue. If neces-
sary, clean this surface prior
to flanging.
) See Chapters 4.3.1 to 4.3.3
See Chapter 4.5.1
IMPORTANT NOTE
No radial or axial active forces may occur
at the shaft extension of the RA multiline
pump. The pump may only be commissi-
oned and operated with an oil/grease
supply; the pump must not run dry.
IMPORTANT NOTE
Personal injury/property damage
The grease pump must never be
put into operation without the re-
servoir cap fitted properly in place.
IMPORTANT NOTE
Never seal off outlets on the RA multiline
pump that are not required.
EN 4. Assembly
51
4
• If necessary, rotate the shaft extension of
the RA pump again according to the position
of the drive slot.
• Carefully place and align the RA pump on
the flanging surface.
• Insert cheese-head screws (2x, M6, re-
commended engagement depth 12 mm)
with lock washers into the installation
surface, apply to the RA pump and tighten
gently.
• Align the RA pump and tighten the chee-
se-head screws crosswise with the follo-
wing tightening torque.
Torque M6 = 10 ±2 Nm
)Tightening torque table from the fitting
manufacturer (suction and delivery screw
union)
• Apply the suction and delivery screw uni-
on to the RA multiline pump and tighten
with the specified torques.
• Check to make sure that the RA pump
runs smoothly by rotating the drive shaft
several times (turn the drive train by
hand).
4.6.2 Multiline pump unit in
foot design, type IM B34
) See Chapters 4.3.4 to 4.3.6
See Chapters 4.5.2 to 4.5.3
The mounting surface for the multiline
pump must be free of dust particles, machi-
ning chips, rust, and paint residue. If neces-
sary, clean this surface prior
to flanging.
• Set up the flanging surface and assembly
threads (M6) according to the respective
RA pump.
• Clean the flanging surface.
• Fastening material provided by customer
in corrosion-protected design:
o Hexagon head screws, 4x acc. to DIN EN
ISO 4017, M6, strength class 8.8
o Washers,4x acc. to ISO 7090, ID 6 mm,
strength class 200-HV
EN4. Assembly
52
4.6.3 Multiline pump units
with 3- and 7-liter reservoir
) See Chapters 4.4.1 to 4.4.2
The mounting surface for the multiline
pump must be free of dust particles, machi-
ning chips, rust, and paint residue. If neces-
sary, clean this surface prior
to flanging.
• Set up the flanging surface and assembly
threads (3-liter unit = M6, 7-liter unit =
M8) according to the respective RA pump.
• Clean the flanging surface.
• Fastening material provided by customer
in corrosion-protected design: 3-liter
unit
o Hexagon head screws (2x) acc. to DIN EN
ISO 401, M6, strength class 8.8
o Washers,2x acc. to DIN ISO 7090, ID
6 mm, strength class 200-HV
7-liter unit
o Hexagon head screws (2x) acc. to DIN EN
ISO 401, M8, strength class 8.8
o Washers,2x acc. to ISO 7090, ID 8 mm,
strength class 200-HV
• Carefully place and align the RA pump
unit on the flanging surface.
• Insert hexagon head screws into the
pump feet, apply the feet to thread of the
installation surface and tighten gently.
• Align the RA multiline pump unit, tighten
hexagon head screws with the following
tightening torque.
Torque M6 = 10 ±2 Nm
M8 = 18 ±2 Nm
• Apply the suction and delivery screw
union to the RA multiline pump unit and
tighten with the specified torques.
• Check to make sure that the RA multiline
pump unit runs smoothly.
• Carefully place and align the RA multiline
pump on the flanging surface.
• Insert hexagon head screws into the
pump feet, apply the feet to thread of the
installation surface and tighten gently.
• Align the RA multiline pump, tighten
hexagon head screws with the following
tightening torque.
Torque M6 = 10 ±2 Nm
• Apply the suction and delivery screw uni-
on to the RA multiline pump and tighten
with the specified torques.
• Check to make sure that the RA multiline
pump runs smoothly.
EN 4. Assembly
53
4
4.7 Electrical motor connection
Consult the motor's rating plate for the elec-
trical characteristics of the motor.
Observe the guidelines in EN 60034-1
(VDE 0530-1) for operation at the limits of
the ranges A (combination of ±5% voltage
deviation and ±2% frequency deviation) and
B (combination of ±10% voltage deviation
and +3/-5% frequency deviation). This ap-
plies especially with regard to deviations in
operating parameters from the ratings on
the motor's rating plate. The limits must
never be exceeded.
WARNING
Electric shock/damage to pump
motor
The available mains voltage
(supply voltage) must match the
speciications on the rating plate of
the motor or of the electrical com-
ponents. Check the fuse protection
of the electrical circuit.
Use only fuses with the prescribed
amperage,
Be sure to connect the motor so as to guaran-
tee a continuously safe electrical connection
(no protruding wire ends); use the assigned
cable end fittings (e.g. cable lugs, wire end
ferrules). Select connecting cables conforming
to DIN VDE 0100 taking into account the ra-
ted current and the conditions of the specific
system (e.g. ambient temperature, type of rou-
ting etc. in accordance with DIN VDE 0298 or
EC / EN 60204-1).
Details regarding electrical connection of the
Motor to the power supply, especially termi-
nal and connector pin assignment, can be
taken from the following motor data table
or customer drawing (if available).
WARNING
Electric shock
Electrical connections for the
product may only be established
by qualified and personnel autho-
rized to do so by the operator. The
electrical operating conditions and
local regulations (e.g., DIN, VDE)
must be observed.
EN4. Assembly
• Connect the pump unit motor according
to the specifications on the motor rating
plate and the motor characteristics.
54
WARNING
Damage to pump motor/pump
When establishing the electrical
connection of the pump motor, be
mindful of the correct direction of
rotation. The direction of rotation
must match the arrow on the
motor.
4.8 Assembly of electric fill level switches
• Connect the pump unit motor according
to the specifications on the motor rating
plate and the motor characteristics.
• Connect a suitable motor circuit breaker
(provided by customer).
• Check the direction of motor rotation ba-
sed on the rotation arrow and the directi-
on of motor fan impeller rotation.
IMPORTANT NOTE
To prevent the pump from running dry
and avoid a difficult restart (complete
venting of the system), the fill level switch
should be coupled to the machine control
unit.
IMPORTANT NOTE
Provide spark quenching if there is inductive
load.
EN 4. Assembly
55
4
4.8.1 Fill level switch for oil (V)
Fill level switch V
Design Min. monitoringContact voltage 10 – 42V AC/DCRated contact current 1 ALoad contact Change-over (reed contact)Connector plug DIN EN 175301-803-AProtection class of plug/socket IP65
4.8.2 Fill level switch for grease (E)
Fill level switch E
Design Reed contactSwitch design 1 switching point min. (changeover)Switching capacity, max. 60 W / VASwitching voltage, max. 230 V AC/DCConnector plug DIN EN 175301-803-AProtection class of plug/socket IP65
4.8.3 Fill level switch for grease (F)
Fill level switch F
Design Reed contactSwitch design 2 switching points (min. – max.)Switching current, max. 1 A with AC/DC1)Switching voltage, max. 42 V AC/DCConnector plug DIN EN 175301-803-AProtection class of plug/socket IP65
Wiring diagram for fill level switch V, Fig. 16
3
2
1
3
2
1
Switch position
at
minimum
Switch position
above
minimum
Wiring diagram for fill level switch E, Fig. 17
3
2
1
3
2
1
Switch position
at
minimum
Switch position
above
minimum
Wiring diagram for fill level switch F, Fig. 18
3
2
1
3
2
1
3
2
1
Switch position at
minimum
Switch position between
minimum and maximum
Switch position at
maximum
EN4. Assembly
56
4.9 Lubrication line arrangement
To ensure that the entire centralized lubrica-
tion system functions smoothly, observe the
following instructions when arranging the
suction line and the lubrication lines:
o To prevent cavitation and thus early failure
of the multiline pump, ensure that the
suction line is sufficiently large.
o The suction line and thus the suction per-
formance should be kept to a minimum
and the RA oil multiline pumps should be
under low admission pressure
(max. 1 bar).
o The lubricant lines must be dimensioned
in accordance with the maximum operating
pressure occurring in the RA multiline
pump used and the displacement of that
lubrication pump.
o If possible, the lubricant line should be
laid with a rising gradient from the RA
multiline pump and be ventable at the
highest point on the lubrication line
system.
o Lubricant feeders at the end of the main
lubricant line must be installed such that
the outlets of the lubricant feeders point
upwards. If the system configuration re-
quires that the lubricant distributors be
arranged below the main lubricant line,
they should not be placed at the end of
the main lubricant line.
o The pipes, hoses, shutoff valves, directional
control valves, fittings, etc. that will be
used must be designed for the maximum
operating pressure of the RA multiline
pump, the permissible temperatures, and
the lubricants that will be delivered. The
lubrication line system also needs to be
protected from excessive pressure by me-
ans of a pressure-limiting valve.
o All components of the lubrication line
system such as pipes, hoses, shutoff
valves, directional control valves, fittings,
etc. must be carefully cleaned before
assembly. No seals in the lubrication line
system should protrude inwards in a way
that disrupts the flow of the lubricant and
could allow contaminants to enter the
lubrication line system.
o Lubrication lines should always be
arranged so that air pockets cannot
form anywhere. Avoid changes in the
cross-section of the lubrication line from
small to large cross-sections in the di-
rection of flow of the lubricant. When the
cross-section does change, the transition
should be gentle.
o The flow of lubricant in the lubrication
lines should not be impeded by the incor-
poration of sharp bends, angle valves, or
flap valves. Unavoidable changes in the
cross-section in lubrication lines must
have smooth transitions. Sudden changes
of direction should be avoided if possible.
EN 4. Assembly
57
4
CAUTION
Slipping hazard
Centralized lubrication systems
must always be free of leaks. Lea-
king lubricant is hazardous due to
the risk of slipping and injury.
Beware of any lubricant leaking
out during assembly, operation,
maintenance, or repair of cent-
ralized lubrication systems. Leaks
must be sealed off without delay.
The venting procedure requires that the RA
multiline pump (Chapter 4.6) and the lubri-
cation feed line and lubrication lines
(Chapter 4.9) already be installed.
4.10 Venting the RA multiline pump and lubricant lines
CAUTION
Follow the safety instructions!
During the following startup of
the RA pump and subsequent
adjustment of the displacement
(Chapter 4.11), observe the safety
instructions from the manufactu-
rer of the machine/system into
which the RA pump has been
installed. Work on the RA pump
must not be performed within the
range of moving parts.
CAUTION
Operate only with properly
installed reservoir cap
RA multiline pumps with reservoir
may only be put into service with
a properly installed reservoir cap.
4.10.1 Venting the RA grease multiline
pump
)See Chapter 4.5
• Position the grease receiver tank below
the RA multiline pump.
• Open the grease lubricant reservoir.
• Fill the grease lubricant reservoir with
oil (viscosity class ISO VG 150 to ISO VG
420) up to about 1 cm above the bottom
strainer.
• Fill the grease lubricant reservoir with
grease up to the permitted level.
• Close the grease lubricant reservoir.
• Switch on the customer-provided drive/
RA pump motor and check the direction
of rotation.
• Loosen the union nuts of the outlet
screw unions on the first pump
element (viewed from the inlet).
EN4. Assembly
58
RA oil lubrication pumps often have a high
step-down ratio, resulting in a longer
venting phase. To prevent the pump from
possibly running dry (cavitating), the venting
procedure must be performed quickly.
• Position the oil receiver tank below the RA
multiline pump.
• Fill the oil reservoir with oil.
)The following step is necessary only on
pump designs where the fill level switch is
positioned above the pump.
• Loosen the vent plug (4), hexagon socket,
WAF 5.
• Leave the vent plug (4) open until the
discharging oil is free of bubbles.
If necessary:
• Switch on the customer-provided drive/
RA pump motor.
• Once the discharging oil is free of bub-
bles, tighten the union nut.
• Perform the venting procedure sequentially
on the following pump elements.
• Repeat the venting procedure at the end
of the respective lubrication lines.
• Switch on the customer-provided drive or
RA pump motor.
• Let the RA multiline pump run until the
discharging oil is free of bubbles.
• Tighten the vent plug (4).
• Loosen the union nuts of the outlet
screw unions.
• Once the discharging oil is free of
bubbles, tighten the union nuts.
• Repeat the venting procedure at the end
of the respective lubrication lines.
• Turn off the customer-provided drive/
RA pump motor.
4.10.2 Venting the RA oil multiline pump
) see Figure 19
EN 4. Assembly
59
4
4.11 Adjusting the displacement using displacement chart and continuous operating pressure
RA multiline pumps are factory-set to full
stroke. For oils and greases with a kinematic
viscosity of 140 mm2/s, the displacement
can be adjusted using the displacement
chart below (Fig. 20) as well as the conti-
nuous operating pressure chart (Fig. 21).
For oils and greases outside this viscosity
range, measurements must be obtained and
the displacement adjusted on their basis.
For adjustments to the displacement of
multiple pump elements, start at the first
pump element (as viewed from the inlet).
The individual pump elements can be set
to no less than 1/3 capacity (setting 0 =
approx. 1/3 capacity).
The adjusting plate (1) is adjusted when the
pump is at a standstill and after loosening
the two cap nuts. A locking pin (2) fitted
between the two rotation direction scales
prevents any accidental changes of rotation
direction.
The displacement of the RA pumps for oils
and greases (reference viscosity 140 mm2/s)
as a function of drive speed and gear ratio is
shown in Figure 20.
Figure 21 illustrates the achievable conti-
nuous operating pressure as a function of
operating viscosity and piston stroke rate.
Piston stroke rate Z =
The maximum operating pressure varies
according to the operating viscosity of the
lubricating medium and the given piston
stroke rate.
Restrictions apply to the permitted ope-
rating viscosity at piston stroke rates >
50 rpm.
Drive speed [n]
Gear ratio [l]
) see Figure 19
• Turn off the pump.
• Slightly loosen the cap nuts (2x).
• Adjust the adjusting plate (1) using the
rotation direction scale (3) according to
the following description, the displace-
ment chart, and the continuous operating
pressure chart (pages 60/61).
• Evenly tighten the cap nuts (2x) with a
torque of 8 Nm.
EN4. Assembly
60
Displacement chart, Fig. 20Pump element, Fig. 19
Rotation direction scale (3) for pump element,
pump rotation counterclockwise, clockwise
Adjusting plate (1)
Bore for tie-rod
with cap nut
Pin (2)
0 101
001
001
Vent
plug(4)
First pump
element
10 20 50 100 200 500 1000 1500
2000
cm3
min
+ou
tlet
cm3
min
+ou
tlet
Drive speed n [rpm]
Dis
pla
cem
ent/
low
er lim
it
Dis
pla
cem
ent/
upper
lim
it
EN 4. Assembly
61
4
Continuous operating pressure chart, Fig. 21
Kinematic viscosity v [mm2/s]
Max
. co
ntinuou
s op
erat
ing
pre
ssure
[bar
]
Piston stroke rate z (rpm)
EN4. Assembly
62
4.12 Note on the rating plate
The rating plate provides important
data such as type designation, order num-
ber, barcode, and serial number.
To avoid loss of this data in case the rating
plate becomes illegible, these characteristics
should be entered in the following Figure.
• Enter characteristics from rating plate in
Figure 22 below.
Characteristics from rating plate, Fig. 22
4.13 Information on CE marking
The CE marking is based on the require-ments of the applied Directives:
○ 2014/30/EC Electromagnetic
Compatibility
○ 2011/65/EU (RoHS II) Directive on the
restriction of the use of certain hazar-
dous substances in electrical and electro-
nic equipment
Note on Low-Voltage Directive 2014/35/EU
The protection objectives of the Low-Volta-
ge Directive 2014/35/EU are met in accor-
dance with Annex 1, No. 1.5.1 of Machinery
Directive 2006/42/EC.
Note on Pressure Equipment Directive
2014/68/EU
Due to its performance characteristics, the
product does not reach the limit values
defined in Article 4, Paragraph 1, Subpara-
graph (a) item (i) and is, pursuant to Article
4, Paragraph 3, excluded from the scope of
Pressure Equipment Directive 2014/68/EC.
SKF Lubrication Systems Germany GmbH
Made in Germany
EN 4. Assembly
63
65
Operating instructions associated with assembly instructions
Multiline pumps of series RAfor SKF MultiFlex oil and grease multiline centralized lubrication systems
66
EN1. Safety instructions/ 2. Lubricants
1. Safety instructions
1.1 General information
2. Lubricants
IMPORTANT NOTE
The operator of the product described here
must ensure that the operating instructions
are read and understood by all persons
responsible for assembly, operation, main-
tenance, and repair of the product.
In addition to the operating instructions,
general statutory regulations and other
regulations for accident prevention and
environmental protection must be observed
and applied.
IMPORTANT NOTE
The lubricant notes listed in Chapter 2
"Lubricants" of the assembly instructions
also apply without restriction to these ope-
rating instructions.
1.2 Disclaimer of liability
SKF Lubrication Systems Germany GmbH
shall not be responsible for damages:
o Caused by contaminated or unsuitable
lubricants
o Caused by the installation of non-original
SKF components or SKF spare parts
o Caused by non-designated use
o Resulting from improper assembly, con-
figuration, filling, direction of rotation and
setting
o Resulting from inadequate venting
o Resulting from improper response to
malfunctions
o Resulting from independent modification
of system components
o Incurred when using non-approved me-
dia; only media approved for these RA
multiline pumps can be used.
EN
67
2
3
1
EN 3. Delivery, returns, and storage EN
Do not top load / This side up
Keep dry
Handle with care, Do not drop
3.3.2 Electronic and electrical devices
o Dry and dust-free surroundings, storage
in well ventilated dry area
o Storage time: max. 24 months.
o Relative humidity: < 65%.
o Storage temperature: + 10 - +40°C.
o No direct sun or UV exposure
o Protected against nearby sources or heat
or cold
3.3.3 General notes
o The product(s) can be enveloped in plastic
film to provide low-dust storage
o Protect against ground moisture by storing
on a shelf or wooden pallet.
o Bare metallic surfaces must be protected
using anti-corrosion agents Check cor-
rosion protection every 6 months and
reapply if necessary
o Motors must be protected from mechanical
damage Do not store motors on the fan
cowl
3. Delivery, returns, and storage
Immediately after receipt, the delivery must
be checked for completeness according
to the shipping documents. Any transport
damage must be reported to the transport
company immediately. The packaging ma-
terial should be preserved until any discre-
pancies are resolved.
o Dry and dust-free surroundings, storage
in well ventilated dry area
o Storage time: max. 24 months.
o Relative humidity: < 65%.
o Storage temperature: + 10 - +40°C.
o No direct sun or UV exposure
o Protected against nearby sources or heat
or cold
3.1. Checking the delivery
3.2. Return shipments
WARNING
Personal injury/property damage
Do not drop the product.
3.3. Storage
3.3.1 Lubrication units
The following conditions apply to storage:
Before return shipment, all parts must be cleaned and properly packed (i.e., according to the requirements of the recipient country).
There are no restrictions for land, air, or
sea transport.
The following must be marked on the packaging of return shipments:
68
5. Commissioning
IMPORTANT NOTE
Observe the instructions from the machi-
ne manufacturer regarding the lubricants
that are to be used.
IMPORTANT NOTE
Only fill using clean lubricant and an
appropriate device. Contaminated lubri-
cants lead to system malfunctions. The lu-
bricant reservoir must be filled without in-
troducing bubbles.
IMPORTANT NOTE
Different lubricants must not be mixed to-
gether. Doing so can cause damage and
require costly and complicated cleaning of
the product/lubrication system. It is re-
commended that an indication of the lu-
bricant in use be attached to the lubricant
reservoir in order to prevent accidental
mixing of lubricants.
5.1 Commissioning
When delivered, the adjusting plates are set
to mark "1” = maximum volume. Do not re-
duce the delivery rate of the pump until the
RA multiline pump/system (assembly inst-
ructions, Chapter 4.10) has been completely
vented and shown to function properly (as-
sembly instructions, Chapter 4.11).
The product described here functions auto-
matically. The lubricant transport in the lu-
brication lines should, however, be subjec-
ted to regular visual inspection.
The lubricant fill level in the lubricant re-
servoir should be subjected to regular vi-
sual inspection. If the lubricant fill level is
too low, lubricant needs to be topped up.
IMPORTANT NOTE
Never seal off outlets on the RA multiline
pump that are not required!
4.1 Information on assembly
The assembly procedure for the product
is described in detail in the assembly inst-
ructions (Chapter 4) associated with these
operating instructions.
4. Assembly
EN 4. Assembly/5. Commissioning
WARNING
Personal injury/property damage
In the case of pumps with prelubri-
cation (and hand crank), make sure
the direction of rotation is correct.
Once the hand crank is pushed in,
it is connected to the pump shaft
via the free-wheeling mechanism;
prelubrication should therefore only
be performed when the pump
shaft is at a standstill. Otherwise
the hand crank will begin to move
in sudden jerks.
69
6
6.1 Temporary shutdown
The described product can be temporarily
shut down by disconnecting the electrical,
pneumatic, and/or hydraulic supply
connections. The safety instructions in these
assembly instructions must be observed
when doing so.
If the product is to be shut down for an
extended period of time, follow the instruc-
tions in Chapter 3, “Transport, delivery, and
storage” in these operating instructions.
To recommission the product, follow the in-
structions in the Chapter "Assembly" in the
assembly instructions.
6. Shutdown and disposal
6.2 Shutdown
If the RA multiline pump units will be per-
manently shut down, the local regulations
and laws regarding the disposal of conta-
minated equipment must be observed.
Lubricants can contaminate soil and
waterways.
4
5
EN
Note
Environmental pollution
Lubricants can contaminate soil
and waterways. Lubricants must
be used and disposed of properly.
Observe the local regulations and
laws regarding the disposal of
lubricants.
The product can also be returned to SKF
Lubrication Systems Germany GmbH for
disposal, in which case the customer is res-
ponsible for reimbursing the costs incurred.
The parts are recyclable.
6. Shutdown and disposal
70
WARNING
System pressure
Lubrication systems are pres-
surized during operation. Lubri-
cation systems must therefore
be depressurized before starting
assembly, maintenance or repair
work, or any system modifications
or system repairs.
EN 7. Maintenance
7. Maintenance
WARNING
Electric shock
De-energize the product prior to
beginning work.
Electrical connections for the pro-
duct may only be established by
qualified personnel authorized to
do so by the operator. The electri-
cal operating conditions and local
regulations (e.g., DIN, VDE) must
be observed.
WARNING
Hot surface
The hot surface of a motor may
cause burns. Motor surfaces may
only be touched with appropriate
gloves or after the motor has been
shut off for an extended time.
SKF products are low-maintenance. All
connections and fittings must be regularly
inspected for proper seating to ensure proper
function. If necessary, the product can be
cleaned using mild cleaning agents that
are compatible with the product's materials
(non-alkaline, non-soap).
For safety reasons, the product must be
disconnected from the power supply. Do not
allow any cleaning agent to enter the interi-
or of the product during cleaning.
It is normally not necessary to clean the in-
terior of the product.
The interior of the product must be cleaned
if incorrect or contaminated lubricant is ac-
cidentally filled into the product.
Contact the SKF Service department if this
occurs.
7.1 General information
71
7
The RA radial piston pumps generally ope-
rate without maintenance.
o Upstream and downstream filters must
be cleaned in time or replaced on a regular
basis.
o Check the readings on visual and electrical
contamination indicators, if present.
o Dirt deposits on the surface of the motor
impair cooling and must be removed
regularly.
o Fill greases and oils only via the filler
socket.
o The RA pump operates without main-
tenance. However, increased wear can
occur if the two cap nuts are tightened
unevenly. This can be identified by re-
duced pump speed or sluggishness of the
pump shaft.
o When dismantling and assembling the
pump, especially the pump elements,
make sure all the components are positi-
oned and aligned correctly.
o Individual parts cannot be swapped out
from one pump element to another. It is
not possible to put them back in the right
positions afterward.
o If a synthetic oil is used as the pumped
fluid, consult the lubricant manufacturer
beforehand to find out whether it will cor-
rode the seals (Perbunan) and whether it
can be mixed with the previous lubricant.
o Following maintenance or repair work,
vent the RA multiline pump and the entire
lubrication system (see Chapter 4.10).
EN7. Maintenance
IMPORTANT NOTE
Only original SKF spare parts may be used.
Unauthorized alterations and the use of
non-original spare parts and accessories
are prohibited and nullify the statutory
warranty.
IMPORTANT NOTE
Only fill using clean lubricant. The purity of
the lubricants used is the decisive factor in
the service life of the pump and the lubri-
cated machinery elements.
Dismantling of the product or individual
parts thereof within the statutory warranty
period is prohibited and voids any claims.
72
8. Malfunctions, causes, and remedies
The following tables provide an overview
of possible malfunctions and their causes.
Contact the SKF Service department if you
cannot remedy the malfunction.
IMPORTANT NOTE
Only original SKF spare parts may be used.
Unauthorized alterations to products and
the use of non-original spare parts and
accessories are prohibited.
WARNING
System pressure
Lubrication systems are pres-
surized during operation. Lubri-
cation systems must therefore
be depressurized before starting
assembly, maintenance or repair
work, or any system modifications
or system repairs.
WARNING
Hot surface
The hot surface of a motor may
cause burns. Motor surfaces may
only be touched with appropriate
gloves or after the motor has been
shut off for an extended time.
8.1 Prior to beginning troubleshooting
In cases of functional failure, always make
sure that all technical specifications have
been complied with in the existing operating
conditions.
IMPORTANT NOTE
Dismantling of the product is prohibited
and voids any claims.
Defective products must be replaced. Only
SKF Service is capable of repairing them.
EN 8. Malfunctions, causes, and remedies
73
8
8.2 Commissioning, product, and system malfunctions
Malfunction Cause Remedy
No delivery and/or no pressure
o Pump not vented
o Motor stopped
o Pump elements set too low
o Viscosity too low/too high
o Speed too low
o Reservoir empty
• Loosen outlet screw unions on the pump body, set the adjusting
plate to "1", allow the pump to run until oil/grease without bub-
bles is discharged (assembly instructions, Chapter 4.10)
• Vent the pump (see Chapter 4.10 in the assembly instructions)
• Check the system voltage
• Pump shaft is stuck (distortion, wear)
• Set a higher delivery rate on the adjusting plate
• Use an approved oil viscosity
• Increase the speed
• Fill the reservoir, vent the RA multiline pump (Chapter 4.10)
Displacement and/or pressure too low
o Pump not vented
o The direction of rotation of the pump
shaft and the marking on the scale do
not match, or:
o Wrong direction of motor rotation
o Great difference in back pressures
o An unused outlet is sealed off
• See above
• Set the adjusting plate to another scale (Chapter 4.11)
(partial dismantling required)
• Check electrical connections and reverse if necessary
• Install screw unions with check valves
• Remove screw plug
• Increase intake pipe Ø or shorten suction line
• Fill with oil of permissible operating viscosity
Grease/oil level switch
o Please refer to separate instructions
EN8. Malfunctions, causes, and remedies
74
9. Accessories
Accessories (ordered separately)
Designation Dimensions Order No.
Union nut Ø 4-R 1/8" Ø 6-R 1/8"
44-0709-2040 44-0709-2041
Double tapered ring Ø 4 Ø 6
44-0405-2002 406-001
Straight male coupling
Ø 4-R 1/8" K Ø 6-R 1/8" K Ø 8-R 1/8" K
404-403W 406-423W 408-423W
Banjo fitting Ø 4-R 1/8" Ø 6-R 1/8" Ø 8-R 1/8"
96-7004-0058 96-7006-0058 96-7008-0058
GE screw union with check valve
Ø 4-R 1/8" K Ø 6-R 1/8" K
24-2103-2933 24-2103-2927
Banjo fitting with check valve
Ø 4-R 1/8" K Ø 6-R 1/8" K
24-2106-2016 24-2106-2017
Banjo fitting 1) Ø 6-R 1/8" 24-2106-2390
Pressure regulating valve 2) 1/8" 24-2103-3680
Pressure regulating valve 3) Ø 6-R 1/8" K 24-2103-3681
1) With additional connection thread for screwing pressure regulating valves in directly.
2) Up to 90 bar, without pipe connection for RA pumps operated for short periods.3) Up to 60 bar, with pipe connection for continuous duty.
SKF quick connectors
Adapter with cylindrical internal thread
Pipe Ø A Thread Order No.
4 G 1/8" 404-040-VS
6 G 1/8" 456-004-VS
Banjo fitting with cylindrical internal thread
Pipe Ø A Thread Order No.
4 G 1/8" 504-108-VS
6 G 1/8" 506-108-VS
Elbows with cylindrical internal thread
Pipe Ø A Thread Order No.
4 G 1/8 taper 514-018-VS
6 G 1/8 taper 506-511-VS
Note
For further detailed information about SKF quick connectors
and related tools, see our brochure on quick connector systems,
brochure No. 1-0103-1.
EN 9. Accessories
75
10
10. Spare parts
Pump element With 1 outlet With 2 outlets With 4 outlets
24-1557-3520 24-1557-3521 24-1557-3522
Stud bolt (tie-rod) for gear ratios 1:1 and 10.5:11)
For 1 pump element For 2 pump elements For 3 pump elements For 4 pump elements For 5 pump elements
44-0717-2060 44-0717-2061 44-0717-2062 44-0717-2063 44-0717-2064
Stud bolt (tie-rod) for gear ratios 5:1 and 125:11)
For 1 pump element For 2 pump elements For 3 pump elements For 4 pump elements For 5 pump elements
44-0717-2069 44-0717-2070 44-0717-2071 44-0717-2072 44-0717-2073
Washer 6.4 DIN 1251) DIN 125-B6.4-ST
Nut M 6 DIN 9341) DIN 934-M6-8
Cap, complete 24-0413-3490
vent plug 466-431-001
Cap nut M6-DIN 9171) 95-0006-0917
Designation Order No.
Rotary drive, coaxial 1:1 24-0701-3000
Coaxial 5:1 24-0701-3070
Coaxial 5:1 with prelubrication 24-0701-3080
Coaxial 15:1 24-0701-3071
Coaxial 15:1 with prelubrication 24-0701-3081
Coaxial 25:1 24-0701-3072
Coaxial 25:1 with prelubrication 24-0701-3082
Coaxial 75:1 24-0701-3073
Coaxial 75:1 with prelubrication 24-0701-3083
Coaxial 125:1 24-0701-3074
Coaxial 125:1 with prelubrication 24-0701-3084
Bevel gear Drive position A 10.5:1 Drive position B 10.5:1
24-0701-3001 24-0701-3002
Spacer ring (only with gear ratio 1:1)
24-1721-2000
Designation Order No.
1) Two required per pump
9
EN10. Spare parts
76
Designation Order No.
Electric motor, order code AF Electric motor, order code AK Electric motor, order code AO
On request
Cheese-head screw2) M5x16 DIN 912 DIN 912-M5x16-8.8
Grease reservoir ( 2kg) Without fill level switch With fill level switch E With fill level switch F
24-0254-2312 24-0254-2334 24-0254-2330
Grease reservoir ( 4.5kg) Without fill level switch With fill level switch E With fill level switch F
24-0254-2310 24-0254-2335 24-0254-2331
Spare parts (ordered separately)
Rotary drive, with bevel gear and grease reservoir
Designation Order No.
Bevel gear Drive position A 10.5:1 Drive position B 10.5:1
24-0701-3001 24-0701-3002
Spacer ring (only with gear ratio 1:1)
24-1721-2001
Pump element
With 1 outlet With 2 outlets With 4 outlets
24-1557-3520 24-1557-3521 24-1557-3522
Stud bolt1)
pump element For 2 pump elements For 3 pump elements
44-0717-2070 44-0717-2071 44-0717-2072
Washer 6.4 DIN 1251) DIN 125-B6.4-ST
Nut M 6 DIN 9341) DIN 934-M6-81) Two required per pump
EN 10.Spare parts
10
skf.com
SKF Lubrication Systems Germany GmbH
2. Industriestrasse 4 · 68766 Hockenheim · Germany
Tel. +49 (0)62 05 27-0
Fax +49 (0)62 05 27-101
www.skf.com/lubrication
SKF Lubrication Systems Germany GmbH
Motzener Strasse 35/37 · 12277 Berlin · Germany
PO Box 970444 · 12704 Berlin · Germany
Tel. +49 (0)30 72002-0
Fax +49 (0)30 72002-111
www.skf.com/lubrication
The Power of Knowledge EngineeringOver the course of more than a century, SKF has specialized in five fields of competence and acqui-red a wide range of application expertise. We utilize this experience to provide innovative solutions to OEMs and other manufacturers in practically all industrial sectors worldwide. Our five fields of com-petence are: bearings and bearing units, seals, mechatronics (combining mechanical and electronic components to improve the performance of classic systems), and extensive services from 3-D com-puter stimulations and modern condition monitoring systems for high reliability to system manage-ment. SKF is a leading global company and guarantees its customers uniform quality standards and global product availability.
Important information on product usage All products from SKF may be used only for their intended purpose as described in this bro-chure and the operating instructions. Should operating instructions be supplied together with the products, they must be read and followed.
Not all lubricants can be fed using centralized lubrication systems. SKF can, on request, inspect the suitability of the lubricant selected by the user for pumping in centralized lubrication systems. Lubrication systems and their components manufactured by SKF are not approved for use in con-junction with gases, liquefied gases, pressurized gases in solution, vapors, or such fluids whose vapor pressure exceeds normal atmospheric pressure (1 013 mbar) by more than 0.5 bar at their maxi-mum permissible temperature.Hazardous materials of any kind, especially the materials classified as hazardous by CLP Regulation EC 1272/2008 may only be used to fill SKF centralized lubrication systems and components and deliv-ered and/or distributed with the same after consulting with and receiving written approval from SKF.
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