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C B C

Wheel BearingsWheel Bearings

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C B C

Bearing usesBearing uses

PivotsPivots WheelsWheels Rotating shaftsRotating shafts Oscillating shaftsOscillating shafts Sliding shaftsSliding shafts

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C B C

BEARING LOADBEARING LOAD RADIAL LOAD RADIAL LOAD - When bearing load - When bearing load

is applied in a vertical direction.is applied in a vertical direction. THRUST LOAD THRUST LOAD - When bearing load - When bearing load

is applied in a horizontal directionis applied in a horizontal direction ANGULAR LOAD ANGULAR LOAD - When bearing - When bearing

load is applied in between vertical load is applied in between vertical and horizontaland horizontal

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C B C

AxialAxial or or thrustthrust load load

Radial LoadRadial Load

Angular LoadAngular Load

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C B C

Radial loadRadial load

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C B C

Angular loadAngular load

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C B C

BEARING BEARING TERMINOLOGYTERMINOLOGY

INNER RACE INNER RACE SEPARATOR OR CAGESEPARATOR OR CAGE ROLLING ELEMENTSROLLING ELEMENTS

• BALLSBALLS• ROLLERSROLLERS

OUTER RACE OR CUPOUTER RACE OR CUP

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C B C

BEARING BEARING TYPESTYPES

CYLINDRICAL BALL CYLINDRICAL BALL BEARINGBEARING

CYLINDRICAL ROLLER CYLINDRICAL ROLLER BEARINGBEARING

TAPERED ROLLER BEARINGTAPERED ROLLER BEARING NEEDLE ROLLER BEARINGNEEDLE ROLLER BEARING

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C B C

Cylindrical Ball Cylindrical Ball bearingsbearings

Radial loads only..Radial loads only.. Can be double rows Can be double rows

of ball bearings..of ball bearings.. Installing bearing..Installing bearing..

• Press the Press the outerouter race race in a housing..in a housing..

• Press the Press the innerinner race race on a shaft..on a shaft..

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C B C

HEAVY LOADHEAVY LOAD

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C B C

Can be double rows Can be double rows of ball bearingsof ball bearings

For heavy For heavy thrust loadsthrust loads

Can with stand Can with stand thrust loadsthrust loads

Can handle Can handle some axial some axial loads loads

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C B C

Some FWD use a Some FWD use a double tapered double tapered bearing.bearing.

Designed to Designed to handle radial handle radial and thrust loads.and thrust loads.

Usually not Usually not serviceableserviceable

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C B C

FRONT WHEEL DRIVE

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C B C

Cylindrical Roller Cylindrical Roller BearingsBearings

Designed for Designed for Radial loadRadial load

Can withstand Can withstand some thrust loadsome thrust load

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C B C

Tapered roller Tapered roller bearingsbearings

Excellent capability to handle :

• Radial Loads

• Thrust Loads

• Angular Loads

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C B C

NEEDLE ROLLER NEEDLE ROLLER BEARINGBEARING

Is very compactIs very compact Small steel rollersSmall steel rollers Thin outer raceThin outer race Used in steering Used in steering

gears and gears and alternatorsalternators

Rollers push Rollers push against each otheragainst each other

For Radial LoadsFor Radial Loads

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C B C

TYPICAL DISC BRAKE TYPICAL DISC BRAKE BEARING ASSEMBLYBEARING ASSEMBLY

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C B C

Bearing DiagnosisBearing Diagnosis

Normal bearing lifeNormal bearing life Bearing failureBearing failure

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C B C

BEARING FAILURESBEARING FAILURES BENT CAGEBENT CAGE ETCHINGETCHING BRINELLINGBRINELLING ABRASIVE ROLLER WATERABRASIVE ROLLER WATER GALLINGGALLING

SERVICE AND SYSTEMSLAB MANUAL PAGE 284, FIG 9-54

MUST REPLACE RACE AND BEARING AS A SET!!!

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C B C

BEARING SERVICEBEARING SERVICE

Should use brass drift punch Should use brass drift punch ((286L286L))

Should use bearing driver Should use bearing driver whenever possible (whenever possible (286C & 291L286C & 291L))

Clean bearing and raceClean bearing and race Pack new grease in bearing (Pack new grease in bearing (289C289C)) Use high temp grease on disc Use high temp grease on disc

brake equipped car. (brake equipped car. (265L265L))

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C B C

AdjustmentAdjustment PAGE 291L

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C B C

Springless sealSpringless seal

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C B C

Double lip sealDouble lip seal

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C B C

Spring loaded SealSpring loaded Seal

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C B C

Seal ReplacementSeal Replacement

Different brands look differentDifferent brands look different What is important is:What is important is:

• Match the ODMatch the OD• Match the IDMatch the ID

Some brands have a steel lip Some brands have a steel lip and some do not.and some do not.

(Caution)(Caution) The steel housing is The steel housing is very thin on somevery thin on some

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C B C

RemembRememberer

Not only does the seal need to look Not only does the seal need to look good now............good now............

It need to be good enough for the It need to be good enough for the next several thousand miles.next several thousand miles.

Buying new seals are a cheap Buying new seals are a cheap insurance insurance