Disassembly and Assembly

DISASSEMBLY

CAUTION:
When removing wheel hub or wheel bearing from knuckle, replace wheel bearing assembly (outer race and inner race) with a new one.
Wheel bearing does not require maintenance. If any of the following symptoms are noted, replace wheel bearing assembly.
- Growling noise is emitted from wheel bearing during operation.
- Wheel bearing drags or turns roughly. This occurs when turning hub by hand after bearing lock nut is tightened to specified torque.

Wheel Hub





Drive out hub and inner race from knuckle with a suitable tool.

Wheel Bearing
When replacing wheel bearing, replace complete wheel bearing assembly (inner race and outer race).





1. Remove bearing inner race.





2. Remove snap rings.





3. Press out bearing outer race.
4. Remove baffle plate, if required.

INSPECTION
Wheel Hub and Knuckle
Check wheel hub and knuckle for cracks by using a magnetic exploration or dyeing test.

Snap Ring
Check snap ring for wear or cracks. Replace if necessary.

ASSEMBLY
- If baffle plate has been removed, replace it with a new one.





- When installing the baffle plate, press new plate so that it is in contact with knuckle wall. Refer to figure.





1. Press new wheel bearing assembly into knuckle until it seats against knuckle shoulder.
Maximum load P: 34 kN (3.5 ton, 3.9 US ton, 3.4 Imp ton)

CAUTION:
- Do not apply disassembly force in direction "R". There is a possibility of breaking the seal. In case of separation (except range of initial clearance) and disassembling of inner race, the wheel bearing shall be replaced with a new part.
- Do not press inner race of wheel bearing assembly or seal.
- Do not apply oil or grease to mating surfaces of wheel bearing outer race and knuckle.

2. Install outer snap ring into groove of knuckle.





3. Press wheel hub into knuckle until it stops when the end of the wheel bearing is hit.
Maximum load P: 49 kN (5.0 ton, 5.5 US ton, 4.9 Imp ton)
- Do not move wheel hub in direction "R".





4. Check bearing operation.
a. Add load P with press.
Load P: 34.3 - 49.0 kN (3.5 - 5.0 ton, 3.9 - 5.5 US ton, 3.44 - 4.92 Imp ton)
b. Spin knuckle several turns in both directions.
c. Make sure that wheel bearings operate smoothly.