Power Steering System Components

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Orders: 1-888-STEER-US Tech support: 1-307-472-0550 Fax: 1-307-235-1551 e-mail: [email protected]

Power Steering System Components

Power Steering Servo ValvesFor all applications

Made for installation at any convenient point in the steering column OR directly onto the rack and pinion, the Woodward servo is the only

type where the amount of power assist (light, medium, heavy, etc.) can be tuned to suit the drivers preference by means of a system of inter-

changeable torsion bars. The bars control the sensitivity of the power steering response and can be switched in the field without disassembly of the

servo. A second revolutionary feature allows external adjustment of the left-to-right balance of the power steering. This is not possible with any

other race car steering system. The Woodward servo allows it to be done right in the car, using nothing but a 5/32 or 4 mm Allen wrench in the

two adjusting screws. Absolutely no OEM or salvage parts of any kind are used to make these servos; all components are made in our own plant.

STANDARD SERVO is a light, compact valve for systems where theworking pressure will not exceed 1200 PSI (85 bars).Track provensince 1996. The world standard for high ow in a small space. Availablein two valve proles and all T-bar sizes.VA850-1 .............. ............... ................ ............... ................ .........475.00VA850-2 .............. ............... ................ ............... ................ .........475.00

HIGH LOAD SERVO has a thicker case and revised porting for severe

conditions in oval track and off-road racing. Designed for workingpressures up to 2350 PSI (160 bars). Available in two valve prolesand all T-bar sizes.VA950-1 .............. ............... ................ ............... ................ .........475.00VA955 ........................................................................................475.00

VALVE TORSION BARS can be changed out to adjust theresponse curve of your servo. Smaller bars increase theresponse; larger bars decrease it. Made of spring temperedalloy steel, the bar is anchored at one end and adjusted forcentering or directional bias at the other end using the setscrews. O-rings are included.

TB180 ............... ............... ................ ............... ..............32.45TB185 ............... ............... ................ ............... ..............32.45TB190 ............... ............... ................ ............... ..............32.45TB195 ............... ............... ................ ............... ..............32.45TB200 ............... ............... ................ ............... ..............32.45TB205 ............... ............... ................ ............... ..............32.45TB210 ............... ............... ................ ............... ..............32.45TB215 ............... ............... ................ ............... ..............32.45TB220 ............... ............... ................ ............... ..............32.45TB225 ............... ............... ................ ............... ..............32.45TB230 ............... ............... ................ ............... ..............32.45TB235 ............... ............... ................ ............... ..............32.45TB240 ............... ............... ................ ............... ..............32.45

VA950-1 VA850-1


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The cutaway view below shows the four large ball bearings that support the valve and isolate it from mechanical steering loads. Large ducts

within the Woodward distribution spool replace the series of small holes used in the stock spools used by all other manufacturers. The Woodwar

design produces quicker response with lower restriction and lower operating temperature.

Competitors spool Woodward spool

Ball bearings

Recent DevelopmentsThe VA900 series servo incorporates several changes from the VA800.

Most obvious are the large tapered ports which increase its flow capacity by

reducing turbulence. At right is shown the top half of a VA900 servo case with

a valve spool actually in place, in its normal installed position relative to the

port openings. You can see that the fluid path is unobstructed all the way into

the channels of the spool. A 900 servo is capable of filling a large diameter

cylinder at velocities well beyond the quickest race car steering and in most

applications will allow 5W-40 engine oil to be used as the hydraulic medium.

The exhaust port of the 900 servo is enlarged to -8 hose size. This ef-

fectively relieves back pressure from the return side of the circuit, further

improving the sensitivity of the steering while reducing the buildup of waste

heat. All existing Woodward reservoirs have removable hose adapters which can

easily be swapped out to accommodate the large return hose from a 900 servo.

Originally developed to meet military requirements, the 900 series

will handle the severe hydraulic shocks of off-road applications involving air

time, collisions with boulders, etc., that would occasionally burst the case of

an 800 servo. This makes it especially suitable for the high working pressures

demanded by current popular oval track setups which gain positive caster in

a roll attitude.

As described in the Rack and Pinion section, the servo does not need to

be attached to the rack itself in order to function; it can be located anywhere

along the steering column, provided its connecting path to the pinion is free of

mechanical play. Moreover, it is not even necessary to bolt it down, provided

either its input or output end is rigidly coupled into the steering shaft so as

to form an extension of it. The valve operates internally and does not depend

on external restraint.

Because its four ball bearings isolate the valve from outside mechanical

loads, the servo can reliably be used as a support point for the steering shaft bybolting it to the chassis and connecting it to the shaft with u-joints.

Repair parts and seal kits are shown at the end of this section. A more

detailed discussion of power steering, including performance data and service

instructions, appears in the Power Steering System Tech section.

SERVO BRACKET holds the servo by its thick billet end caps, preventing outsideloads from distorting the case. Gold zinc plated. Includes six 10-24 x 1/2 sockethead cap screws with lock washers.

FB25 ............... ................ ............... ................ ............... ............... ................ ..... 31.75


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Power Steering ReservoirsHigh ow, de-aerating design

With a quick-steering rack, the performance of the reservoir is critically

important in preventing fluid starvation and loss of power steering. In a typi-

cal aftermarket reservoir, returning fluid creates turbulence, which pulls air

bubbles below the surface, which are then drawn into the pump intake. Air

in the fluid makes it compressible, which causes hard steering and hydraulic

jitter, and promotes overheating.


MachinedBilletFillerNeck

WrenchFlats

-10 or -12Outlet Fittings

InternalFlowStraightener

SuperLight.035Wall

-6 or -8ReturnFittings

In this dual-chamber design, the

return stream is tangent to the tank wall,

creating a centrifuge effect to remove

air bubbles. The freed air escapes at the

top of the outer chamber through bleed

holes leading to the inner chamber. The

bleed holes point downward to prevent

hot oil spray when the lid is removed. A

-6 fitting is used with the 800 servo, and

a -8 with the 900 servo.

Farther down in the tank, the spin

of the oil is arrested as it is drawn through

a flow-straightening baffle by the pumpsuction. The pump draws from the inner

chamber which is free of turbulence. In

fact, the flow is so clean that the surface

of the liquid cannot be seen to move with

the engine running.

The outlet fitting is available for

either -10 and -12 hose, and both are

contoured for minimum flow restriction.

Free-ow outlet

Air bleed holes

BRACKETfor 1.75 inch TUBE

FB37 ........... 35.00

BRACKETfor 1.5 inch TUBE

FB35 ............35.00

BRACKETfor FIREWALL

FB36 ............35.00

RESERVOIR with -6 return, -10 outlet and FB35 bracket V100B ............ 105.00RESERVOIR with -6 return, -10 outlet and FB36 bracket V100C ............ 105.00

RESERVOIR with -6 return, -10 outlet and FB37 bracket V100W ........... 105.00RESERVOIR with -6 return, -10 outlet and FB38 bracket V100J ............. 105.00

RESERVOIR with -8 return, -10 outlet and FB35 bracket V101B ............ 105.00RESERVOIR with -8 return, -10 outlet and FB36 bracket V101C ............ 105.00RESERVOIR with -8 return, -10 outlet and FB37 bracket V101W ........... 105.00RESERVOIR with -8 return, -10 outlet and FB38 bracket V101J ............. 105.00

RESERVOIR with -8 return, -12 outlet and FB35 bracket V102B ............ 105.00RESERVOIR with -8 return, -12 outlet and FB36 bracket V102C ............ 105.00RESERVOIR with -8 return, -12 outlet and FB37 bracket V102W ........... 105.00RESERVOIR with -8 return, -12 outlet and FB38 bracket V102J ............. 105.00

RESERVOIR ONLY, no bracket V100X(specify fittings).............. ............... 87.50

Shown withFB38 OFFSET bracketfor 1.5 inch TUBE


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Power Steering PumpsBelt or direct drive

The KRC power steering pumps in this catalog use inter-

changeable output fittings. This feature allows the mechanic to

fine-tune the pump volume to match the quickness of the steering.

KRC race car pumps are made to precision tolerances and will pro-

duce a remarkably constant volume over the entire RPM range of

the engine. This constant volume can be over 3 GPM for dirt and

off-road racing, down to less than 1.5 GPM for pavement and road

racing, depending on the fitting installed. These pumps are available

in two specific displacements, 7.2 cc and 9.6 cc per revolution. In

general, the 7.2 cc pump is used for pavement racing and the 9.6

cc for dirt. More specifically, we recommend the 9.6 pump for racks

3.14 and quicker. Graphs of pump output vs. RPM using different

flow fittings are shown in the Power Steering System Tech section.

To cope with the increased loads that current chassis setups

place on the steering system, all KRC pumps are now factory-

equipped with a 1450 PSI relief valve setting, with 1600 PSI avail-

able as an option. This provides extra power on demand without

altering the baseline system pressure or preventing useful feedback

to the driver.

There are several choices for drive systems. The more posi-

tive the better, since even 5% slippage will mean lost power steer-

ing. Also, the drive ratio should keep the pump itself above 800

RPM. Although pumps mounted on the back of the dry-sump pump

are positively driven, such systems run at only 55% engine speed,

which means they can slow to the point of losing suction during

corner entry on dirt and momentarily stalling the power assist.

In these installations it is critical to use a high-displacement pump,

with an efficient supply hose routed so as to prevent air traps. An

extra-capacity intake fitting is available to convert the supply hose

to -12 size. For a more detailed discussion of pump issues, refer to

Power Steering System Tech.

BELT DRIVE PUMPS preset to 1450 PSI relief:Standard (7.2 cc/rev) with V pulley HP277V ...... ...........332.50Standard (7.2 cc/rev) no pulley HP277X ............ ...........264.05High output (9.6 cc/rev) with V pulley HP279V..............332.50High output (9.6 cc/rev) no pulley HP279X ........ ...........264.05

Relief Valve preset to 1600 PSI HP400 .............. .............29.60V-belt pulley ONLY HP110 ............... ................ ............... .72.75

Pump RPM using 6 inch pulley (% engine RPM):Driven by 3.5 dia. ...........................................................58%Driven by 4 dia. ..............................................................67%Driven by 4.5 dia. ...........................................................75%Driven by 5 dia. ..............................................................83%

POLY-V PULLEY,hardcoatedaluminum, 4.25 inch diameter.HP112 ............... .............63.25

Suggested for crate motorsor other applications whereidlers will ensure adequatewraparound of the belt. Will notreplace a V-belt in a conven-tional 3-cornered layout!

HTD PULLEY for positivedrive. Hardcoated aluminum,40 teeth. HP111 ............ 88.75

Pump RPM with this pulley:Driven by 24 teeth........ 60%Driven by 28 teeth ........ 70%Driven by 30 teeth ........ 75%Driven by 32 teeth ........ 80%

OVERSIZE PUMP INTAKE ADAPTER converts KRC pump for -12 supply hose; its bore istapered to exactly match the port in the pump body. Opens up the critical suction side of ahigh-volume pump. Note: requires a -12 outlet tting on the reservoir and a vacuum-ratedhose; see the Power Steering System Techsection of this catalog.

Adapter for KRC pumps V112 ............. ................ ............... ................ ............... .......... 22.25Adapter for Woodward reservoir V114 ........................................................................ 22.25

shown: HP279V


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Pump mounting bracketsAlthough it may seem relatively low-tech, many racers are discovering tha

the most cost-effective and trouble-free setup is a block-mounted pump with a singl

V-belt driving it independently of the water pump and fan so as to avoid slippage from

conflicting loads. Turning the pump at 70-80% engine speed gives reliable performanc

even at a low idle. The FB15 mounting bracket developed by Brian Birkhofer utilize

the two front engine-mount bolts on a small-block Chevy and aligns the pulley perfectlfor an independent drive belt. This bracket lets you position the pump with the intak

underneath so theres no high spot to form an air lock. The hole and slot are machine

to accept Delphi pumps as well as KRC pumps, and bolts are supplied for both types

PUMP BRACKET KITS:Birky Bracket Chevy SB left block mount incl. hardware FB15 ............... ..... 50.65Chevy SB left head mount incl. hardware HP260 .............. ............... ........... 44.00Ford 289-302 left head mount incl. hardware HP262 ............. ................ ..... 71.50Ford 351-400 left head mount incl. hardware HP263 ............. ................ ..... 71.50Blank (bolt pattern and adjustment slot on 6 x 6 plate) HP265 .................... 33.80

shown: HP291

MOUNTING ADAPTERS forpopular dry sump pumpsinclude all bolts.

PETERSONHP550 ......60.25SCP HP555 ..................90.25BARNES HP560 ........... 78.30

DRIVE SPUDS screw into any drysump mainshaft with 3/8-24 hole.SPLINE HP20 .............. ......... 39.90HEX HP21 ........ ................ .... 29.00FLOW CONTROL FITTINGS

keep pump output at the vol-ume shown regardless ofRPM.

Pavement use:1.05 gpm 4 HP04.......19.001.32 gpm 5HP05 ......19.001.58 gpm 6 HP06 ....... 19.001.84 gpm 7 HP07 ....... 19.00General (comes w/pump):2.11 gpm blue HP08...19.00Dirt use:2.37 gpm B HP09 ....... 19.002.64 gpm C HP10.......19.002.90 gpm D HP11 ....... 19.003.17 gpm E HP12 ....... 19.00


rear takeoff

DIRECT DRIVE PUMPS are available in either theKRC-originated 19-spline drive or the universallypopular 3/8 hex drive. Direct drive pumps are suppliedin the 9.6 cc/rev. higher displacement type becausethey typically run at low speeds and are equipped withthe HP12 output and 1600 PSI relief valve.SPLINE drive HP280 ... ............... ................ .... 346.80HEX drive HP290 ................ ............... ............ 351.95

STACKABLE pumps have a 3/8 hex takeoff andprovision for attaching a 3-bolt fuel pump.SPLINEdrive w/ rear takeoff HP281 .............. 485.40HEXdrive w/ rear takeoff HP291.................... 490.55

Relief valve preset to 1600 PSI HP400 ............ .29.60-12 adapter for KRC pumps V112 .....................22.25-12 adapter for Woodward reservoir V114 ... ......22.25


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Hydraulic Assist CylindersFor GE/HE and GL/HL racks

Track proven since 1989 and continually improved since, these lightweight double-acting cylinders bolt rigidly to the rack housing with four

symmetrically located socket head cap screws. The thrust is absorbed independently of the bolts by a 9/16 dowel. A thick nonmetallic piston prevents

metal-to-metal contact in the bore and contributes to the very long useful life of these parts. These cylinders are tested to 1800 PSI in both directions.

DOUBLE ACTING CYLINDER ASSEMBLY complete with boot,bolts, and steel hose ttings. All internal parts are easily replaceable.

1.13 bore GE150B.................................................................150.871.38 bore GE150C* ...............................................................160.25

*NOTE: The C cylinder is standard equipment on GE/HE419 and445 racks. Installation on GE/HE209 thru 392 racks requires one ofthe retroft kitsshown on the next page.

ROD BOOT, computer-designed for an extreme ratio of extension to compression, protects thepiston rod from rock hits and keeps dried mud from damaging the seals. GE361 .............14.95

CYLINDER TUBE is 6063-T8 aluminum witha polished ID; part includes plug and o-ring.

for GE150B (1.13 bore) cylinder:GE160B with GE161B ........................ 45.25

for GE150C (1.38 bore) cylinder:GE160C wi th GE161C ........................ 47.95

PISTON ROD is a good spare part to carry.The outer end can bend in a crash, savingthe rest of the cylinder. Includes lock nutsand washers.

for GE150B (1.13 bore) cylinder:Rod with piston and seal installedGEA170B ............................................ 35.31

for GE150C (1.38 bore) cylinder:Rod with piston and seal installedGEA170C ............................................ 38.25


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GE264GE265


Cylinder HardwareFor GE/HE and GL/HL racks

The B cylinder is supplied as standard on racks from 2.09 through 3.92. The C cylinder is supplied as standard on 4.19 and 4.45 racks

Both these standard combinations use the GE264 (or GEM264) rod bracket.

The C cylinder can be substituted on racks from 2.09 through 3.92 as part of the High Load Option but requires a retrofit kit in order t

avoid physical interference with the housing. The kit consists of a shim, a longer housing dowel, a GE265 (or GEM265) rod bracket, and two low-hea

screws for the upper two holes in the pinion bearing cap.

GEM264 GEM265

INSTALLATION HARDWARE and KITS

for GE/HE209-392 racks with B cylinder and GE/HE419-445 racks with C cylinder:STANDARD ROD BRACKET includes bolt and washers GE264 ............... ............... ........... 28.35MONOBALL ROD BRACKET includes bolt and washers GEM264 .............. ................ ........ 34.78THRUST DOWEL (1/2 inch long, includes bolt) GE107 .............. ................ ............... ............. 5.00

for GE/HE209-392 racks with C cylinder:STANDARD ROD BRACKET includes bolt and washers GE265 ............... ............... ........... 28.35MONOBALL ROD BRACKET includes bolt and washers GEM265 .............. ................ ........ 34.78CYLINDER SHIM GE151S ............. ................ ............... ................ ............... ............... .......... 10.00THRUST DOWEL (5/8 inch long, includes bolt) GE108 .............. ................ ............... ............. 5.00LOW HEAD 10-24 SCREWS (pair) GE153 ............... ............... ............... ................ ............... . 3.00

to install a C cylinder on a GE/HE209-392 standard rackoriginally equipped with a B cylinder:RETROFIT KIT (includes GE150C, GE265, GE151S and GE108) GE150CK ................... 188.75MOUNTING HARDWARE ONLY, NO CYLINDERGE150K ............. ................ ............... ...... 45.00

to install a C cylinder on a GE/HE209-392 monoball rackoriginally equipped with a B cylinder:RETROFIT KIT (includes GE150C, GEM265, GE151S and GE108) GEM150CK ............. 195.18MOUNTING HARDWARE ONLY, NO CYLINDERGEM150K ................ ............... ............... . 51.43

GE108

GE151S

CYLINDER RESEAL KIT includes the piston with seal installed, both head

and plug o-rings, rod bushing, rod seal and rod wiper.

Kit for GE150B cylinder (1.13 bore) R150B ............... ................ .......... 24.08Kit for GE150C cylinder (1.38 bore) R150C ............... ................ .......... 27.15

When disassembling a cylinder, always remove the piston from the rodrst and pull the rod OUTWARD. That way only the smooth, undamagedsection of the rod will pass through the bushing and seals. Never remove aused rod by pulling its damaged end back through the seals; any protrudingscars, rust or wrench burrs will damage the seal grooves and destroy theeffectiveness of the new seals.For complete instructions on cylinder repair, refer to the Power SteeringSystem Techsection.

Shim GE151S shown in place


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Custom Dual CylindersRally and Off-road

Built to individual requirements of length and

stroke, these have 1.38 pistons and heavy-duty .875

diameter hard chromed piston rods drilled full length

for weight reduction. They are intended for installa-

tion directly from fixed hardpoints on the chassis out

to the movable arms on the spindles or hub carriers.

Their large effective piston area when used in cross-

connected pairs makes them an excellent packaging

solution for heavy off-road vehicles with short pivot

centers. For use with the 900 series servo.

Power Steering FluidPetroleum Base, non-synthetic

The continuing introduction of aggressive chemicals into power steering (and au-

tomatic transmission) fluids in recent years has created compatibility issues with many

proven seal elastomers. For example, the nitrile compound Buna N, the most resilient and

extrusion-resistant seal material ever developed (for example, after 75 years its still used

for the o-rings in AN fittings) is subject to shrinkage and embrittlement from contact with

most synthetic fluids. Contrary to their advertising, performance aftermarket syntheticsand semi-synthetics are NOT universally suitable for all power steering systems, and in many

cases will prove actively destructive. So-called anti-foaming agents (usually just a thick-

ener whose supposed foam-suppressing action consists of keeping the air bubbles suspended

in the oilexactly where you dont want them) are another ingredient best avoided. Some

other additives, such as those sold to restore power steering, will cause Buna N seals to

lose their durometer hardness and swell beyond their dimensional tolerances. While that may

help a 72 Buick, it is guaranteed to cause rough steering in a race car with a four-inch rack.

The only medium recommended for use in our systems is petroleum (OIL). Within this

category there are numerous options, but for specific service in Woodward power steering

this fluid is compatible with all elastomers and nonmetallic materials used in our systems,

and with all hydraulic hoses. It contains no silicones, no phosphate esters...and no purple

dye. It does have a good combination of lubricity, chemical stability, thermal diffusion, and

de-aerating properties which make it unsurpassed for use in Woodward-equipped race cars.

Note: THIS CANNOT BE SHIPPED BY AIR.

Power Steering CoolerClamp-on installation

Cars with streamlined bodywork which excludes air

circulation from under the hood often need help extracting heat

from the steering hydraulics. This heat exchanger is machined

with very thin cooling fins and is also black anodized to pro-

mote black-body radiation and prevent efficiency-destroying

corrosion. Its large internal cross-section enables it to be used

in a fairly long return line without adding restriction or back

pressure. It is supplied with both -6 and -8 hose adapters.

The assembly is a mechanically rigid unit and

does not require any mounting provision welded to

the chassis. The example shown can be easily clamped

to any 1-1/2 inch chassis tube, such as the down

tube ahead of the radiator, and rotated for best ex-

posure to clean air. For maximum efficiency the unit

should be placed square to the airstream so that air

will flow past both finned elements simultaneously.


QuartPSF-1 ....................... 15.00Case of 6PSF-6 ................. 78.00

POWER STEERING COOLER for the return line:

Clamp mount for 1.5 tube V200A .................. 229.00Clamp mount for 1.75 tube V200B ................ 229.00Bolt-on surface mount V200C ....................... 229.00


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SERVO SPOOL SEAL KIT includes the four glass-reinforced Teon spool rings with Vitonpreload o-rings. Note: Use an installation mandrel to put the seals on the spool (refer to thePower Steering System Techsection). R800 ............. ................ ............... ................ ....... 24.00

Suction Hose KitA vacuum-rated hose on the supply side of the

pump is absolutely necessary to prevent inevitable

collapse and loss of power steering. It is rarely if everpublished in the catalog descriptions, but the fact is,

neither push-lock hose nor black neoprene hose cov-

ered with stainless braid (the kind with the red and

blue ends) contains any reinforcement against collapse

from suction. While this type of hose may work on the

scavenge side of a dry sump, it will NOT stand up to

quick power steering in a race car. A typical supply

hose failure occurs as follows:

As fluid heats up it softens the rubber and the

hose begins to close down from pump suction. At

this point the pump begins to starve and the power

steering starts to feel heavy. Soon the pump begins

to cavitate, which creates yet more heat, until the

now-limp hose is sucked completely shut and the

power steering disappears or locks up. The heat-

ing and collapsing process takes about 7 laps. Two or

three cycles of this will destroy the internal sealing

sufaces of the pump.

Sometimes the hose will suck shut and lock

up the steering only during quick steering move-

ments. Troubleshooting this can be difficult because

a newer hose will often spring back to shape after

cooling off. This not only conceals the fault from a vi-

sual inspection, but after the system has cooled down

the power steering will be restored. This is a dead

giveaway that the problem lies with the fluid supply,

because its the only problem that appears to fix

itself. This all-too-common form of power steering

failure can be avoided by using a vacuum-rated hose.

SERVO SHAFT SEAL KIT includes two Viton loadedlip seals and two Viton outer o-rings.R581V.....................................................................18.75

SERVO SHAFT SEAL KIT includes two Hallite loadedlip seals and two Viton outer o-rings. NEW ITEMR581H ....................................................................15.75

TORSION BAR SCREW KIT includes the two directionaladjusting screws, the anchor set screw, the two plugscrews and six o-rings.R010 .......................................................................10.25

Service K itsHigh quality components made by the USAs leading producers of elastomeric seals. Refer to the

Power Steering System Tech section for seal replacement instuctions.

SUCTION HOSE per foot HS10 ............................................................7.27

HOSE KITfor plumbing either belt- or dry-sump-driven pump has ve feet of-10 hose and three reusable hose ends: 90o, 45oand straight.HK10 ...................................................................................................85.00

HOSE KITfor dry-sump-driven pump has three feet of -10 hose and tworeusable hose ends: one 90oand one 45oend.HK9 .....................................................................................................62.85

HOSE ENDS (Note: These ends are intended specically for this hose. Donot install these ends on other hose OR install other ends on this hose.)Straight end HS180 .............................................................................12.5090oend HS190 ....................................................................................21.9545oend HS145 ....................................................................................23.70

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Power Steering System Components