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Wheel Bearings - PowerPoint PPT Presentation


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Wheel Bearings. Bearing uses. Pivots Wheels Rotating shafts Oscillating shafts Sliding shafts. BEARING LOAD. RADIAL LOAD - When bearing load is applied in a vertical direction. THRUST LOAD - When bearing load is applied in a horizontal direction

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Presentation Transcript
bearing uses
Bearing uses
  • Pivots
  • Wheels
  • Rotating shafts
  • Oscillating shafts
  • Sliding shafts
bearing load
BEARING LOAD
  • RADIAL LOAD - When bearing load is applied in a vertical direction.
  • THRUST LOAD - When bearing load is applied in a horizontal direction
  • ANGULAR LOAD - When bearing load is applied in between vertical and horizontal
bearing terminology
BEARING TERMINOLOGY
  • INNER RACE
  • SEPARATOR OR CAGE
  • ROLLING ELEMENTS
    • BALLS
    • ROLLERS
  • OUTER RACE OR CUP
bearing types
BEARING TYPES
  • CYLINDRICAL BALL BEARING
  • CYLINDRICAL ROLLER BEARING
  • TAPERED ROLLER BEARING
  • NEEDLE ROLLER BEARING
cylindrical ball bearings
Cylindrical Ball bearings
  • Radial loads only..
  • Can be double rows of ball bearings..
  • Installing bearing..
    • Press the outerrace in a housing..
    • Press the inner race on a shaft..
can be double rows of ball bearings
Can be double rows of ball bearings
  • For heavy thrust loads
  • Can with stand thrust loads
  • Can handle some axial loads
slide12
Some FWD use a double tapered bearing.
  • Designed to handle radial and thrust loads.
  • Usually not serviceable
slide13
FRONT

WHEEL

DRIVE

cylindrical roller bearings
Cylindrical Roller Bearings
  • Designed for Radial load
  • Can withstand some thrust load
tapered roller bearings
Tapered roller bearings
  • Excellent capability to handle :
    • Radial Loads
    • Thrust Loads
    • Angular Loads
needle roller bearing
NEEDLE ROLLER BEARING
  • Is very compact
  • Small steel rollers
  • Thin outer race
  • Used in steering gears and alternators
  • Rollers push against each other
  • For Radial Loads
bearing diagnosis
Bearing Diagnosis
  • Normal bearing life
  • Bearing failure
bearing failures
BEARING FAILURES
  • BENT CAGE
  • ETCHING
  • BRINELLING
  • ABRASIVE ROLLER WATER
  • GALLING

MUST REPLACE RACE AND BEARING AS A SET!!!

SERVICE AND SYSTEMS

LAB MANUAL

PAGE 284, FIG 9-54

bearing service
BEARING SERVICE
  • Should use brass drift punch (286L)
  • Should use bearing driver whenever possible (286C & 291L)
  • Clean bearing and race
  • Pack new grease in bearing (289C)
  • Use high temp grease on disc brake equipped car. (265L)
slide21
Adjustment

PAGE 291L

seal replacement
Seal Replacement
  • Different brands look different
  • What is important is:
    • Match the OD
    • Match the ID
  • Some brands have a steel lip and some do not.
  • (Caution) The steel housing is very thin on some
remember
Remember

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

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

Buying new seals are a cheap insurance

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