TIRES AND WHEELS - ertyu.org · † Operating vehicle with over or under inflated ... STEEL WHEEL 8 – TIRE 22 - 2 TIRES AND WHEELS PL DESCRIPTION AND ... line in the drop well on

T

D

D

S

D

T

vmcWt

acls

PL TIRES AND WHEELS 22 - 1

TIRES AND WHEELS

TABLE OF CONTENTS

page page

IRES . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1

page

PRESSURE GAUGES . . . . . . . . . . . . . . . . . . . . . . 6

C

S

WHEELS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10

TIRES

TABLE OF CONTENTS

page

ESCRIPTION AND OPERATIONTIRE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1RADIAL-PLY TIRES . . . . . . . . . . . . . . . . . . . . . . . . 2SPARE TIRE–TEMPORARY . . . . . . . . . . . . . . . . . . 3REPLACEMENT TIRES . . . . . . . . . . . . . . . . . . . . . 3IAGNOSIS AND TESTINGTREAD WEAR INDICATORS . . . . . . . . . . . . . . . . . 3TIRE WEAR PATTERNS. . . . . . . . . . . . . . . . . . . . . 4TIRE NOISE OR VIBRATION . . . . . . . . . . . . . . . . . 4VEHICLE LEAD DIAGNOSIS AND

CORRECTION . . . . . . . . . . . . . . . . . . . . . . . . . . 4ERVICE PROCEDURES

TIRE INFLATION PRESSURES . . . . . . . . . . . . . . . 6TIRE PRESSURE FOR HIGH SPEED

OPERATION . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6TIRE AND WHEEL ROTATION . . . . . . . . . . . . . . . . 6REPAIRING TIRE LEAKS . . . . . . . . . . . . . . . . . . . . 7TIRE AND WHEEL MATCH MOUNTING . . . . . . . . . 7LEANING AND INSPECTIONCLEANING TIRES . . . . . . . . . . . . . . . . . . . . . . . . . 9PECIFICATIONSTIRE SPECIFICATIONS . . . . . . . . . . . . . . . . . . . . . 9

ESCRIPTION AND OPERATION

IRETires are designed and engineered for each specific

ehicle (Fig. 1). They provide the best overall perfor-ance for normal operation. The ride and handling

haracteristics match the vehicle’s requirements.ith proper care they will give excellent reliability,

raction, skid resistance, and tread life.Driving habits have more effect on tire life than

ny other factor. Careful drivers will obtain, in mostases, much greater mileage than severe use or care-ess drivers. A few of the driving habits which willhorten the life of any tire are:

• Rapid acceleration• Severe application of brakes• High-speed driving• Taking turns at excessive speeds• Striking curbs and other obstacles• Operating vehicle with over or under inflated

tire pressuresRadial ply tires are more prone to irregular tread

wear. It is important to follow the tire rotation inter-val shown in the section on Tire Rotation. This willhelp to achieve a greater tread-life potential.

T

est

a“mp

t

&i

22 - 2 TIRES AND WHEELS PL

DESCRIPTION AND OPERATION (Continued)

IRE IDENTIFICATIONTire type, size, aspect ratio and speed rating are

ncoded in the letters and numbers imprinted on theide wall of the tire. Refer to the chart to decipherhe tire identification code (Fig. 2).

Performance tires will have a speed rating letterfter the aspect ratio number. For example, the letterS” indicates that the tire is speed rated up to 112ph (180 km/h). The speed rating is not always

rinted on the tire sidewall.• Q -up to 100 mph (160 km/h)• T -up to 118 mph (190 km/h)• U -up to 124 mph (200 km/h)• H -up to 130 mph (210 km/h)• V -up to 149 mph (240 km/h)• Z -more than 149 mph (240 km/h) (consult the

ire manufacturer for the specific speed rating)An All Season type tire will have either M + S, MS or M-S (indicating mud and snow traction)

mprinted on the side wall.

Fig. 1 Tir1 – CAST ALUMINUM WHEEL2 – WEIGHTS3 – CENTER CAP4 – WHEEL COVER

TIRE CHAINSRefer to the owners manual supplied with the vehi-

cle to determine whether the use of tire chains is per-mitted on this vehicle.

RADIAL-PLY TIRESRadial-ply tires improve handling, tread life and

ride quality, and decrease rolling resistance.Radial-ply tires must always be used in sets of

four. Under no circumstances should they be used onthe front only. They may be mixed with temporaryspare tires when necessary. A maximum speed of 50MPH is recommended while a temporary spare is inuse.

Radial-ply tires have the same load-carrying capac-ity as other types of tires of the same size. They alsouse the same recommended inflation pressures.

The use of oversized tires, either in the front orrear of the vehicle, can cause vehicle drive train fail-ure. This could also cause inaccurate wheel speed

ypical)5 – MOUNTING NUTS6 – VALVE STEM7 – STEEL WHEEL8 – TIRE

e (T

sB

sp

S

goDtc

R

a



ignals when the vehicle is equipped with Anti-Lockrakes.The use of tires from different manufactures on the

ame vehicle is NOT recommended. The proper tireressure should be maintained on all four tires.

PARE TIRE–TEMPORARYThe temporary spare tire is designed for emer-

ency use only. The original tire should be repairedr replaced at the first opportunity, then reinstalled.o not exceed speeds of 50 M. P. H. when using the

emporary spare tire. Refer to Owner’s Manual foromplete details.

EPLACEMENT TIRESThe original equipment tires provide a proper bal-

nce of many characteristics such as:• Ride• Noise• Handling• Durability• Tread life• Traction• Rolling resistance• Speed capability

Fig. 2 Tire Identification

It is recommend that tires equivalent to the origi-nal equipment tires be used when replacement isneeded.

Failure to use equivalent replacement tires mayadversely affect the safety and handling of the vehi-cle.

The use of oversize tires may cause interferencewith vehicle components. Under extremes of suspen-sion and steering travel, interference with vehiclecomponents may cause tire damage.

WARNING: FAILURE TO EQUIP THE VEHICLE WITHTIRES HAVING ADEQUATE SPEED CAPABILITYCAN RESULT IN SUDDEN TIRE FAILURE.

DIAGNOSIS AND TESTING

TREAD WEAR INDICATORSTread wear indicators are molded into the bottom

of the tread grooves. When tread depth is 1.6 mm(1/16 in.), the tread wear indicators will appear as a13 mm (1/2 in.) band (Fig. 3).

Tire replacement is necessary when indicatorsappear in two or more grooves or if localized baldingoccurs.

Fig. 3 Tread Wear Indicators1 – TREAD ACCEPTABLE2 – TREAD UNACCEPTABLE3 – WEAR INDICATOR

T

tt

am

t(

T

cd

ea


DIAGNOSIS AND TESTING (Continued)

IRE WEAR PATTERNSUnder inflation will cause wear on the shoulders of

ire. Over inflation will cause wear at the center ofire.

Excessive camber causes the tire to run at anngle to the road. One side of tread is then wornore than the other (Fig. 4).Excessive toe-in or toe-out causes wear on the

read edges and a feathered effect across the treadFig. 4).

IRE NOISE OR VIBRATIONRadial-ply tires are sensitive to force impulses

aused by improper mounting, vibration, wheelefects, or possibly tire imbalance.

Fig. 4 Tire W

To find out if tires are causing the noise or vibra-tion, drive the vehicle over a smooth road at varyingspeeds. Note the noise level during acceleration anddeceleration. The engine, differential and exhaustnoises will change as speed varies, while the tirenoise will usually remain constant.

VEHICLE LEAD DIAGNOSIS AND CORRECTIONUse the following chart to diagnose a vehicle that

has a complaint of a drift or lead condition. The useof this chart will help to determine if the lead condi-tion is the result of a bad tire or is caused by thewheel alignment.

r Patterns



S

P

cr

T

f

t


ERVICE PROCEDURES

RESSURE GAUGESA quality air pressure gauge is recommended to

heck tire pressure. After checking the air pressure,eplace valve cap finger tight.

IRE INFLATION PRESSURESUnder inflation causes rapid shoulder wear, tire

lexing, and can result in tire failure (Fig. 5).

Over inflation causes rapid center wear and loss ofhe tire’s ability to cushion shocks (Fig. 6).

Improper inflation can cause:• Uneven wear patterns• Reduced tread life• Reduced fuel economy• Unsatisfactory ride

Fig. 5 Under Inflation Wear1 – THIN TIRE TREAD AREAS

Fig. 6 Over Inflation Wear1 – THIN TIRE TREAD AREA

• The vehicle to drift.For proper tire pressure specification refer to the

Tire Inflation Pressure Chart Placard provided withthe vehicle.

Tire pressures have been chosen to provide safeoperation, vehicle stability, and a smooth ride. Tirepressure should be checked cold once per month.Check tire pressure more frequently when theweather temperature varies widely. Tire pressure willdecrease when the outdoor temperature drops.

Inflation pressures specified on the placard arealways the cold inflation pressure of the tire. Coldinflation pressure is obtained after the vehicle hasnot been operated for at least 3 hours, or the vehicleis driven less than one mile after being inoperativefor 3 hours. Tire inflation pressures may increasefrom 2 to 6 pounds per square inch (psi) during oper-ation. Do not reduce this normal pressure build-up.

WARNING: OVER OR UNDER INFLATED TIRESCAN AFFECT VEHICLE HANDLING. THE TIRE CANFAIL SUDDENLY, RESULTING IN LOSS OF VEHICLECONTROL.

TIRE PRESSURE FOR HIGH SPEEDOPERATION

DaimlerChrysler Corporation advocates driving atsafe speeds within posted speed limits. Where speedlimits allow the vehicle to be driven at high speeds,correct tire inflation pressure is very important. Forspeeds up to and including 120 km/h (75 mph), tiresmust be inflated to the pressures shown on the tireplacard. For continuous speeds in excess of 120 km/h(75 mph), tires must be inflated to the maximumpressure specified on the tire sidewall.

Vehicles loaded to the maximum capacity shouldnot be driven at continuous speeds above 75 mph(120 km/h).

For emergency vehicles that are driven at speedsover 90 mph (144 km/h), special high speed tiresmust be used. Consult tire manufacturer for correctinflation pressure recommendations.

TIRE AND WHEEL ROTATION

NON-DIRECTIONAL TREAD PATTERN TIRESTires on the front and rear axles operate at differ-

ent loads and perform different functions. For thesereasons, they wear at unequal rates, and tend todevelop irregular wear patterns. These effects can bereduced by timely rotation of tires. The benefits ofrotation are especially worthwhile. Rotation willincrease tread life, help to maintain mud, snow, andwet traction levels, and contribute to a smooth, quietride.

taame

Nip

D

mtmtrs

ct

R

fdtt


SERVICE PROCEDURES (Continued)

The suggested rotation method is the forward-crossire rotation method (Fig. 7). This method takesdvantage of current tire industry practice whichllows rotation of radial-ply tires. Other rotationethods may be used, but may not have all the ben-

fits of the recommended method.

OTE: Only the 4 tire rotation method may be usedf the vehicle is equipped with a low mileage or tem-orary spare tire.

IRECTIONAL TREAD PATTERN TIRESSome vehicles are fitted with special high-perfor-ance tires having a directional tread pattern. These

ires are designed to improve traction on wet pave-ent. To obtain the full benefits of this design, the

ires must be installed so that they rotate in the cor-ect direction. This is indicated by arrows on the tireidewalls.When wheels and tires are being installed, extra

are is needed to ensure that this direction of rota-ion is maintained.

Refer to Owner’s Manual for rotation schedule.

EPAIRING TIRE LEAKSFor proper repairing, a radial tire must be removed

rom the wheel. Repairs should only be made if theefect, or puncture, is in the tread area (Fig. 8). Theire should be replaced if the puncture is located inhe sidewall.

Fig. 7 Forward-Cross Tire Rotation Method

Deflate tire completely before attempting to dis-mount the tire from the wheel. Use a lubricantsuch as a mild soap solution when dismountingor mounting tire. Use tools free of burrs or sharpedges which could damage the tire or wheel rim.

Before mounting tire on wheel, make sure all rustis removed from the rim bead and repaint if neces-sary.

Install wheel on vehicle, and progressively tightenthe 5 wheel nuts to a torque of 135 N·m (100 ft. lbs.).

TIRE AND WHEEL MATCH MOUNTINGWheels and tires are match mounted at the factory.

This means that the high spot of the tire is matchedto the low spot on the wheel rim. This technique isused to reduce run-out in the wheel/tire assembly.The high spot on the tire is marked with a paintmark or a bright colored adhesive label on the out-board sidewall. The low spot on the rim is identifiedwith a label on the outside of the rim and a dot orline in the drop well on the tire side of the rim. If theoutside label has been removed the tire will have tobe removed to locate the dot or line on the inside ofthe rim.

Before dismounting a tire from its wheel, a refer-ence mark should be placed on the tire at the valvestem location. This reference will ensure that it isremounted in the original position on the wheel.

Fig. 8 Tire Repair Area1 – REPAIRABLE AREA

tMo

d

t

md

f

fi

osr1t



(1) Measure the total indicator runout on the cen-er of the tire tread rib. Record the indicator reading.ark the tire to indicate the high spot. Place a mark

n the tire at the valve stem location (Fig. 9).

(2) Break down the tire and remount it 180egrees on the rim (Fig. 10).(3) Measure the total indicator runout again. Mark

he tire to indicate the high spot.(4) If runout is still excessive (in excess of 1.524m or 0.060 in.), the following procedures must be

one.• If the high spot is within 102 mm (4.0 in.) of the

irst spot and is still excessive, replace the tire.• If the high spot is within 102 mm (4.0 in.) of the

irst spot on the wheel, the wheel may be out of spec-fications. Refer to Wheel and Tire Runout.

• If the high spot is NOT within 102 mm (4.0 in.)f either high spot, draw an arrow on the tread fromecond high spot to first. Break down the tire andemount it 90 degrees on rim in that direction (Fig.1). This procedure will normally reduce the runouto an acceptable amount.

Fig. 9 First Measurement On Tire1 – REFERENCE MARK2 – 1ST MEASUREMENT HIGH SPOT MARK TIRE AND RIM3 – WHEEL4 – VALVE STEM

Fig. 10 Remount Tire 180 Degrees1 – VALVE STEM2 – REFERENCE MARK

Fig. 11 Remount Tire 90 Degrees In Direction ofArrow

1 – 2ND HIGH SPOT ON TIRE2 – 1ST HIGH SPOT ON TIRE

C

C

do

ws

S

T


LEANING AND INSPECTION

LEANING TIRESRemove the protective coating on the tires before

elivery of a vehicle. This coating may cause deteri-ration of the tires.To remove the protective coating, apply warmater and let it soak for a few minutes. Afterwards,

crub the coating away with a soft bristle brush.

Steam cleaning may also be used to remove the coat-ing.

NOTE: DO NOT use gasoline, mineral oil, oil-basedsolvent or a wire brush for cleaning.

PECIFICATIONS

IRE SPECIFICATIONS

The following guide should help you understand the tire designations:

P Passenger car tire (or “T” for temporary-use tire).

185 Nominal width of tire in millimeters.

70 Tire height-to-width ratio.

R Radial-ply tire (or “D” for bias-ply tire).

14 Nominal rim diameter in inches.

Do not install smaller than minimum size tires shown on the tire inflation placard on the vehicle.

D

D

S

D

W

ov


WHEELS

TABLE OF CONTENTS

page page

R

S

ESCRIPTION AND OPERATIONWHEEL . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10WHEEL COVER (LOCK-ON) . . . . . . . . . . . . . . . . . 11IAGNOSIS AND TESTINGWHEEL INSPECTION . . . . . . . . . . . . . . . . . . . . . . 11TIRE AND WHEEL RUNOUT . . . . . . . . . . . . . . . . 12ERVICE PROCEDURES
TIRE AND WHEEL BALANCE. . . . . . . . . . . . . . . . 13
ehicle capacity.

EMOVAL AND INSTALLATIONWHEEL COVER (LOCK-ON). . . . . . . . . . . . . . . . . 15WHEEL COVER RETAINING NUT . . . . . . . . . . . . 15TIRE AND WHEEL ASSEMBLY. . . . . . . . . . . . . . . 16PECIFICATIONSWHEEL SPECIFICATIONS . . . . . . . . . . . . . . . . . . 17

ESCRIPTION AND OPERATION

HEELOriginal equipment wheels are designed for proper

peration at all loads up to the specified maximum

All models use steel or cast aluminum drop centerwheels (Fig. 1). Every wheel has raised sectionsbetween the rim flanges and rim drop well calledsafety humps (Fig. 2).

Initial inflation of the tires forces the bead overthese raised sections. In case of air loss the raised

Fig. 1 Wheels and Covers (Typical)1 – CAST ALUMINUM WHEEL2 – WEIGHTS3 – CENTER CAP4 – WHEEL COVER

5 – MOUNTING NUTS6 – VALVE STEM7 – STEEL WHEEL8 – TIRE

su

ws

waqweo

eea

W

3

5ttt

iwtcc

t



ections help hold the tire in position on the wheelntil the vehicle can be brought to a safe stop.Cast aluminum wheels require special balanceeights to fit on the thicker flange of the rim and

pecial wheel clamps for the alignment equipment.The wheel studs and nuts are designed for specificheel applications and must be replaced with equiv-lent parts. Do not use replacement parts of lesseruality or of a substitute design. All aluminumheels use wheel nuts with an enlarged nose. Thisnlarged nose is necessary to ensure proper retentionf the wheels.Vehicles that are equipped with lock-on wheel cov-

rs use large nose wheel nuts. The wheel nuts arexternally threaded so that the wheel covers can bettached to the wheel nuts.

HEEL COVER (LOCK-ON)This vehicle uses a lock-on type wheel cover (Fig.

) on certain models.The wheel cover is attached to the wheel using thenuts located in the wheel cover (Fig. 3). The nuts in

he wheel cover thread onto a special externallyhreaded wheel nut (Fig. 4) to retain the wheel covero the wheel.

The wheel cover retaining nut (Fig. 3) is retainedn the wheel cover and will stay on the wheel coverhen un-threaded from the wheel nut. If required,

he retaining nut can be removed from the wheelover and replaced as a separate part of the wheelover.The lock-on wheel cover can not be removed from

he wheel until all 5 wheel cover retaining nuts are

Fig. 2 Safety Rim1 – TIRE2 – WELL3 – SAFETY HUMPS4 – FLANGE

un-threaded from the wheel nuts. Then the lock-onwheel cover can be removed by hand from the wheel.

DIAGNOSIS AND TESTING

WHEEL INSPECTIONInspect wheels for:• Excessive run out• Dents or cracks• Damaged wheel lug nut holes• Air Leaks from any area or surface of the rim

NOTE: Do not attempt to repair a wheel by ham-mering, heating or welding.

If a wheel is damaged an original equipmentreplacement wheel should be used. When obtainingreplacement wheels, they should be equivalent inload carrying capacity. The diameter, width, offset,

Fig. 3 Wheel Cover And Retaining Nut1 – WHEEL COVER RETAINING NUTS2 – TIRE3 – WHEEL4 – LOCK-ON WHEEL COVER

Fig. 4 Wheel Nut And Wheel Cover Retaining Nut1 – WHEEL NUT2 – EXTERNAL THREADS3 – LOCK-ON WHEEL COVER RETAINING NUT

ps

WRTUSIMI

T

Nv

a

t

mt

ma

cMa(

M

a

s

t

(

s

t

so

Fig. 5 Tightening Wheel Nuts

Fig. 6 Run Out Gauge



ilot hole and bolt circle of the wheel should be theame as the original wheel.

ARNING: FAILURE TO USE EQUIVALENTEPLACEMENT WHEELS MAY ADVERSELY AFFECTHE SAFETY AND HANDLING OF THE VEHICLE.SED WHEELS ARE NOT RECOMMENDED. THEERVICE HISTORY OF THE WHEEL MAY HAVE

NCLUDED SEVERE TREATMENT OR VERY HIGHILEAGE. THE RIM COULD FAIL WITHOUT WARN-

NG.

IRE AND WHEEL RUNOUT

OTE: Runout should always be measured off theehicle and on a suitable balance machine.

Radial run out is the difference between the highnd low points on the outer edge of the tire or wheel.Lateral run out is the total side–to–side wobble of

he tire or wheel.Radial run out of more than 1.5 mm (.060 inch)easured at the center line of the tread may cause

he vehicle to shake.Lateral run out of more than 2.0 mm (.080 inch)easured at the side of the tire as close to the tread

s possible may cause the vehicle to shake.Sometimes radial run out can be reduced by relo-

ating the wheel and tire on the wheel studs (Seeethod 1). If this does not reduce run out to an

cceptable level, the tire can be rotated on the wheel.See Method 2).

ETHOD 1 (RELOCATE WHEEL ON HUB)Check accuracy of the wheel mounting surface;

djust wheel bearings.Drive vehicle a short distance to eliminate tire flat

potting from a parked position.Verify all wheel nuts are tightened and properly

orqued in the correct sequence (Fig. 5).Use run out gauge D-128-TR to determine run out

Fig. 6).Relocate the wheel on the mounting studs, two

tuds over from the original position.Retighten wheel nuts until all are properly

orqued. This will prevent brake distortion.Check radial run out. If still excessive, mark tire

idewall, wheel, and stud at point of maximum runut (Fig. 7) and proceed to Method 2.

Fig. 7 Chalk Marking On Wheel, Tire And Stud1 – STUD2 – TIRE3 – CHALK MARK LOCATIONS

M

w

i

r(

l(

t1ra

S

T

fno



ETHOD 2 (RELOCATE TIRE ON WHEEL)Rotating tire on wheel is particularly effectivehen there is run out in both tire and wheel.Remove tire from wheel and remount wheel on hub

n former position.Check the radial run out of the wheel (Fig. 8). The

adial runout should be no more than 0.762 mm0.030 inch).

Check the lateral run out of the wheel (Fig. 9). Theateral run out should be no more than 0.762 mm0.030 inch).

If the point of greatest wheel radial run out is nearhe original chalk mark, remount the tire on the rim80 degrees from its original position. Recheck theun out. If this does not reduce the run out to ancceptable level, replace the wheel and/or the tire.

ERVICE PROCEDURES

IRE AND WHEEL BALANCEBalancing need is indicated by vibration of seats,

loor pan, or steering wheel. The vibration will beoticed mostly when driving over 90 km/h (55 mph)n a smooth road.

Fig. 8 Checking Wheel Radial Run Out1 – MOUNTING CONE2 – SPINDLE SHAFT3 – WING NUT4 – PLASTIC CUP5 – DIAL INDICATOR6 – WHEEL7 – DIAL INDICATOR

It is recommended that a two plane dynamic bal-ancer be used when a wheel and tire assemblyrequire balancing. Static balancing should be usedonly when a two plane balancer is not available.

Off-vehicle tire and wheel balancing is recom-mended to be used on this vehicle.

NOTE: If on vehicle equipment is being used to bal-ance the tire /wheel assemblies, remove the oppo-site tire/wheel from the vehicle.

For static balancing, find the location of heavy spoton tire/wheel causing the imbalance. Counter balancewheel directly opposite the heavy spot. Determineweight required to counterbalance the area of imbal-ance. Place half of this weight on the inner rimflange and the other half on the outer rim flange(Fig. 10).

For dynamic balancing, the balancing equipment isdesigned to indicate the location and amount ofweight to be applied to both the inner and outer rimflanges (Fig. 11).

Fig. 9 Checking Wheel Lateral Run Out1 – MOUNTING CONE2 – SPINDLE SHAFT3 – WING NUT4 – PLASTIC CUP5 – DIAL INDICATOR6 – WHEEL7 – DIAL INDICATOR



Fig. 10 Static Unbalance & Balance1 – HEAVY SPOT2 – OF SPINDLE3 – ADD BALANCE WEIGHTS HERE

4 – CORRECTIVE WEIGHT LOCATION5 – TIRE OR WHEEL TRAMP, OR WHEEL HOP

Fig. 11 Dynamic Unbalance & Balance1 – OF SPINDLE2 – ADD BALANCE WEIGHTS HERE PER DIRECTION OF

DYNAMIC BALANCING EQUIPMENT.

3 – CORRECTIVE WEIGHT LOCATION4 – HEAVY SPOT WHEEL SHIMMY AND VIBRATION

R

W

R

Nnmiri

w

wc

I

twt

cw

Nna


EMOVAL AND INSTALLATION

HEEL COVER (LOCK-ON)

EMOVE

OTE: When unthreading the wheel cover retaininguts (Fig. 12) from the wheel nuts it is recom-ended that a hand wrench be used and not an

mpact wrench. Use of an impact wrench couldesult in damage to the lock-on wheel cover retain-ng nuts.

(1) Un-thread the 5 nuts (Fig. 12) attaching theheel cover to the wheel nuts.

(2) Grasp the wheel cover and pull straight out-ard from the wheel. This will remove the wheel

over from the wheel.

NSTALL(1) Align the valve notch in the wheel cover with

he valve stem on the wheel (Fig. 12). Align theheel cover retaining nuts with the externally

hreaded wheel nuts.(2) By hand, start to thread all 5 of the wheel

over retaining nuts onto the externally threadedheel nuts.

OTE: When tightening the wheel cover retaininguts it is recommended that a hand wrench be usednd not an impact wrench. Use of an impact wrench

Fig. 12 Wheel Cover Retaining Nuts1 – TIRE2 – VALVE STEM3 – LOCK-ON WHEEL COVER4 – WHEEL5 – WHEEL COVER RETAINING NUTS

could result in damage to the lock-on wheel coverretaining nuts.

(3) Tighten each of the wheel cover retaining nuts.If the retaining nut “jumps” a thread (slips), which isan override feature of the retaining nut, retightenthe retaining nut to a point just prior to this occur-ring. To avoid rattling of the wheel cover be sure allfive retaining nuts are correctly tightened.

WHEEL COVER RETAINING NUTIf a retaining nut for the lock-on wheel cover is

damaged, it can be replaced as a separate componentof the wheel cover. Use the following procedure forreplacing a wheel cover retaining nut.

REMOVE(1) If required, remove the wheel cover from the

wheel. Refer to Wheel Cover Lock-On in the RemovalAnd Installation Section in this group of the servicemanual for the procedure.

NOTE: The retaining nut flange can not be forcedpast the large retaining tab. When removing retain-ing nut from wheel cover, the flange on the retain-ing nut must be forced past the 2 small retainingtabs on wheel cover.

(2) From the back side of the wheel cover, pushoutward and tilt the retaining nut sideways forcingthe flange on the retaining nut past the 2 smallretaining tabs in the retaining nut hole of the wheelcover (Fig. 13).

Fig. 13 Wheel Cover Retaining Nut Retention1 – WHEEL COVER2 – WHEEL COVER RETAINING NUT3 – SMALL RETAINING TABS4 – LARGE RETAINING TAB

rni

I

wr

iw

T

C

R

L

s

h

I

Cotden

su

Ca

n

pfif

S

R

L


REMOVAL AND INSTALLATION (Continued)

(3) When flange on retaining nut is past the 2etaining tabs on the wheel cover, remove retainingut from wheel cover by pushing or pulling from hole

n wheel cover.

NSTALL(1) Install retaining nut in hole of wheel coverith retaining nut flange positioned under the large

etaining flange (Fig. 13).(2) Push on hex of retaining nut forcing the retain-

ng nut flange past the 2 small retaining tabs inheel cover.

IRE AND WHEEL ASSEMBLY

AST WHEEL

EMOVAL(1) Raise the vehicle. Refer to HOISTING in the

UBRICATION AND MAINTENANCE section.(2) Remove the wheel mounting nuts from the

tuds.(3) Remove the tire and wheel assembly from the

ub.

NSTALLATION

AUTION: Installing the wheel mounting nuts with-ut having good metal-to-mental contact between

he back of the wheel and the hub mounted brakeisc or drum could cause the wheel to bind andventually cause loosening of the wheel mountinguts.

(1) Install the tire and wheel assembly on the hubtuds against the hub mounted brake disc or drumsing the hub pilot as a guide.

AUTION: When installing the tire and wheelssembly, never use oil or grease on studs or nuts.(2) Install and lightly tighten the wheel mounting

uts in the proper sequence (Fig. 14).(3) Lower the vehicle.(4) Progressively tighten the 5 wheel nuts in the

roper sequence until tightened to half of the speci-ied torque (Fig. 14). Finally, tighten the wheel nutsn the proper sequence to a torque of 135 N·m (100t. lbs.).

TEEL WHEEL

EMOVAL(1) Raise the vehicle. Refer to HOISTING in the

UBRICATION AND MAINTENANCE section.

CAUTION: When removing the lock-on wheel cover,do not attempt to pry the wheel cover off the wheel.This can result in damage to the wheel cover. Thewheel cover is removed by unthreading the wheelcover retaining nuts and pulling it off the wheel byhand.

NOTE: When unthreading the lock-on wheel coverretaining nuts (Fig. 15) from the wheel nuts it is rec-ommended that a hand wrench be used and not animpact wrench. Use of an impact wrench couldresult in damage to the lock-on wheel cover retain-ing nuts.

(2) Unthread the nuts attaching the wheel cover tothe wheel mounting nuts (Fig. 15).

Fig. 14 Tightening Wheel Nuts

Fig. 15 Wheel Cover Retaining Nuts1 – TIRE2 – VALVE STEM3 – LOCK-ON WHEEL COVER4 – WHEEL5 – WHEEL COVER RETAINING NUTS

ww

s

h

I

Cotden

su

Ca

t

pf


REMOVAL AND INSTALLATION (Continued)

(3) Grasp the wheel cover and pull straight out-ard. This will remove the wheel cover from theheel.(4) Remove the wheel mounting nuts from the

tuds (Fig. 16).

(5) Remove the tire and wheel assembly from theub.

NSTALLATION

AUTION: Installing the wheel mounting nuts with-ut having good metal-to-mental contact between

he back of the wheel and the hub mounted brakeisc or drum could cause the wheel to bind andventually cause loosening of the wheel mountinguts.

(1) Install the tire and wheel assembly on the hubtuds against the hub mounted brake disc or drumsing the hub pilot as a guide.

AUTION: When installing the tire and wheelssembly, never use oil or grease on studs or nuts.(2) Install and lightly tighten the wheel nuts in

he proper sequence (Fig. 17).(3) Lower the vehicle.(4) Progressively tighten the 5 wheel nuts in the

roper sequence until tightened to half of the speci-ied torque (Fig. 17). Finally, tighten the wheel nuts

Fig. 16 Wheel Nuts1 – WHEEL2 – EXTERNALLY THREADED WHEEL NUTS3 – TIRE

in the proper sequence to a torque of 135 N·m (100ft. lbs.).

(5) Align the valve notch in the wheel cover withthe valve stem on the wheel (Fig. 15). Align thewheel cover retaining nuts with the externallythreaded wheel nuts.

(6) By hand, start to thread all 5 of the wheelcover retaining nuts onto the externally threadedwheel nuts.

NOTE: When tightening the wheel cover retainingnuts it is recommended that a hand wrench be usedand not an impact wrench. Use of an impact wrenchcould result in damage to the lock-on wheel coverretaining nuts.

(7) Tighten each of the wheel cover retaining nuts.If the retaining nut “jumps” a thread (slips), which isan override feature of the retaining nut, retightenthe retaining nut to a point just prior to this occur-ring. To avoid rattling of the wheel cover be sure allfive retaining nuts are correctly tightened.

SPECIFICATIONS

WHEEL SPECIFICATIONS

Wheel:Wheel Mounting Stud Size . . . . . . M12 x 1.5 mmWheel Mounting Nut Hex Size . . . . . . . . . 19 mmWheel Mounting Nut Torque . . . . . 115–155 N·m

(85 to 115 ft. lbs.)

Fig. 17 Wheel Nut Tightening Sequence

Documents

TIRES AND WHEELS - ertyu.org · † Operating vehicle with over or under inflated ... STEEL WHEEL 8 – TIRE 22 - 2 TIRES AND WHEELS PL DESCRIPTION AND ... line in the drop well on