Disassembly and Assembly

DISASSEMBLY

CAUTION: 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 hub bearing drags or turns roughly. This occurs when turning hub by hand after bearing lock nut is tightened to specified torque.
- After wheel bearing is removed from hub.

Wheel bearing





- Remove wheel hub from axle housing using a suitable tool.





- Remove inner race from hub using a bearing replacer/ puller.





- Remove grease seals from axle housing.





- Remove snap rings.





- Press out bearing outer race.

CAUTION: Do not reuse old inner race although it is of the same brand as the bearing assembly.

Axle housing





- Attach a drift on outer shell of bushing as shown in figure, remove bushing using arm bushing remover.
When placing axle housing in a vise, use wooden blocks or copper plates as pads.





- Ensure axle housing bore is free from scratches or deformities before pressing bushing into it.
- Attach bushing to chamfered bore end of axle housing and press it until it is flush with end face of axle housing.





- When installing shock absorber bushing, make sure that it is positioned as shown.

INSPECTION
Wheel hub and axle housing
- Check wheel hub and axle housing for cracks by using a magnetic exploration or dyeing test.
- Check wheel bearing for damage, seizure, rust or rough operation.
- Check rubber bushing for wear or other damage.
- Check snap ring for wear or cracks.
Replace if necessary.

ASSEMBLY





1. Install snap ring into groove of axle housing.





2. Press new wheel bearing assembly into axle housing. Press only on outer race of wheel bearing assembly.
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 axle housing.
- Before pressing, check for correct bearing grease seal orientation, as inner and outer seals are different.





- Install snap ring.





- Pack grease seal lip with multi-purpose grease.





- Install outer grease seal.





- Press wheel hub into axle housing with suitable tool.
Maximum load P: 29 kN (3 ton, 3.3 US ton, 3.0 Imp ton)
Be careful not to damage grease seal.





With wheel hub pressed into axle housing, apply 49,000 N (5,000 kg, 11,000 lbs.) to wheel hub and rotate both clockwise and counterclockwise 10 times to minimize resistance. Attach spring scale in the position shown at left and pull at a rate of 10 rpm to measure rotating torque.
Load: 49,000 N (5,000 kg, 11,000 lbs.)
Rotating torque: 0.2 - 2.4 Nm (2.3 - 24.3 kg-cm, 2.0 - 21.1 inch lbs.)
Spring scale reading: 2.0 - 20.6 N (0.2 - 2.1 kg, 0.4 - 4.6 lbs.)
If measured value is outside specifications, replace wheel bearing. Also make sure axial play does not exist in wheel hub when a 49,000 N (5,000 kg, 11,000 lbs.) load is applied.





- Install inner grease seal.