Page 727 - Workshop Manual - Aumark (BJ1051)

25-17
Rear axle- Rear wheel hub with brake drum assembly

(e). Install the lock nut of the left rear wheel hub bearing
with a lock nut wrench of wheel hub bearing.
Hint:
It is no need to screw down the lock nut of the left rear
wheel hub bearing at this step.
(f). Turn the left rear wheel hub for 2 to 3 rings with
hand and make the rear wheel hub bearing enter
into the correct position.
(g). Operate with the lock nut wrench of wheel hub
bearing again to screw down the lock nut of the
left rear wheel hub bearing.
Hint:
Loosen the lock nut of the left rear wheel hub bearing
reversely for 1/8 to 1/6 revolution after screwing down.
(h). Adjust the clearance between the left rear brake
drum and the brake shoe lining. (Refer to “chapter
26 service brake – rear wheel brake, adjustment”)
(i). Check the pre-stressing force of the left rear
wheel hub bearing.
• Rotate the left rear wheel hub for 2 to 3 rings by hand.
Standard: Rotate freely
If the defects of turning blockage and
unsmoothness are found out, rotate the lock nut
of the left rear wheel hub bearing for adjustment.
• Measure the rotary breakout force of the left rear
wheel hub with spring balance.
Rotary breakout force:
25
Vehicle type Rotary breakout force

1051 series 31.3 ～ 52.3 N

1061 series 30 ～ 55 N

1089 series 30 ～ 55 N

If the rotary breakout force is beyond the limit range, adjust
rotate the lock nut of the left rear wheel hub bearing t.
(j). Apply lubricating grease on the locking washer
of the left rear wheel hub bearing.
Lubricating grease: Lithium Grease No. 2
(k). Screw down 2 bolts and install the locking
washer of the left rear wheel hub bearing.
Hint:
• If the mounting hole on the locking washer of the
left rear wheel hub bearing doesn’t align with the
threaded hole on the lock nut of the left rear wheel
hub bearing, turn over the locking washer.
• If the locking washer still doesn’t align with the
threaded hole, then rotate the lock nut ,it is
necessary tp adjust.

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