Disassembly and Assembly
DISASSEMBLY
CAUTION: When removing wheel hub or wheel bearing from knuckle, replace wheel bearing assembly (outer race, inner race and grease seals) with a new one. Wheel bearing does not usually 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 fuming hub by hand after bearing lock nut is tightened to specified torque.
Wheel hub
Press out hub with inner race (outside) from knuckle with a suitable tool.
Wheel bearing
When replacing wheel bearing, replace wheel bearing assembly (inner race and outer race).
1. Remove bearing inner race (outside), then remove outer grease seal.
2. Remove inner grease seal from knuckle.
3. Remove inner and outer snap rings.
4. Press out bearing outer race.
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
1. Install inner snap ring into groove of knuckle.
2. Press new wheel bearing assembly into knuckle.
Maximum load P:
29 kN (3 ton, 3.3 US ton, 3.0 Imp ton)
CAUTION:
- Do not press inner race of wheel bearing assembly.
- Do not apply oil or grease to mating surfaces of wheel bearing outer race and knuckle.
3. Install outer snap ring into groove of knuckle.
4. Pack grease seal lip with multi-purpose grease.
5. Install outer grease seal.
Maximum load P:
10 kN (1 ton, 1.1 US ton, 1.0 Imp ton)
6. Install inner grease seal.
Maximum load P:
10 kN (1 ton, 1.1 US ton, 1.0 Imp ton)
7. Press wheel hub into knuckle.
Maximum load P:
29 kN (3 ton, 3.3 US ton, 3.0 Imp ton)
- Be careful not to damage grease seal.
8. Check bearing operation.
a. Add load P with press.
Load P:
34.3 - 68.7 kN
(3.5 - 7.0 ton, 3.9 - 7.7 US ton, 3.44 - 6.89 Imp ton)
b. Spin knuckle several turns in both directions.
c. Make sure that wheel bearings operate smoothly.