1. Wheel Bearings

2. Bearing uses Pivots Wheels Rotating shafts Oscillating shafts
Sliding shafts

3. 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

4. Radial Load
Axial or thrust load
Angular Load

5. Radial load

6. Angular load

7. BEARING TERMINOLOGY INNER RACE SEPARATOR OR CAGE ROLLING ELEMENTS
BALLS
ROLLERS
OUTER RACE OR CUP

8. BEARING TYPES CYLINDRICAL BALL BEARING CYLINDRICAL ROLLER BEARING
TAPERED ROLLER BEARING
NEEDLE ROLLER BEARING

9. Cylindrical Ball bearings
Radial loads only..
Can be double rows of ball bearings..
Installing bearing..
Press the outer race in a housing..
Press the inner race on a shaft..

10. HEAVY LOAD

11. Can be double rows of ball bearings
For heavy thrust loads
Can with stand thrust loads
Can handle some axial loads

12. Some FWD use a double tapered bearing.
Designed to handle radial and thrust loads.
Usually not serviceable

13. FRONT
WHEEL
DRIVE

14. Cylindrical Roller Bearings
Designed for Radial load
Can withstand some thrust load

15. Tapered roller bearings
Excellent capability to handle :
Radial Loads
Thrust Loads
Angular Loads

16. 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

17. TYPICAL DISC BRAKE BEARING ASSEMBLY

18. Bearing Diagnosis
Normal bearing life
Bearing failure

19. 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

20. 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)

21. Adjustment
PAGE 291L

22. Springless seal

23. Double lip seal

24. Spring loaded Seal

25. 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

26. 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