Section E
9803/8550
Section E
Issue 1
Drive Motors
13 - 7
Dismantling and Assembly (cont’d)
Later type motor with twin bearing output shaft.
Dismantling
Drain the oil from the motor and mark the relative positions
of the front and rear cases. Separate the front case 2 from
the rear case as detailed on the previous page.
Remove split ring 3 using a soft steel drift to separate.
Remove shim washer 4.
Support the front casing on blocks and press out shaft 1.
Remove bearing cone 7 from the assembly.
Remove bearing cup 7 from the front case using a puller.
Carefully remove seal 11 from the front case.
Remove bearing cup 8 from the front case and the cone
from the shaft. Use a puller or soft steel drift.
The remainder of the dismantling procedure is as described
on the previous page.
Assembly
Carefully press bearing cup 8 into the front casing.
Insert seal 11 into the front case. Grease lips of seal with
JCB HP Grease.
Carefully press bearing cup 7 into the front casing.
Position drive shaft 1 vertically on a press. Warm bearing
cone 8 and press into position on the shaft.
Pack the front bearing cone with JCB HP Grease and
assemble the front cover onto the shaft, taking care not to
damage the lips of seal 11 on the splines of the shaft.
Warm bearing cone 7 and press onto the shaft to a load of 5
tonnes. Rotate the front case during this process. Allow
assembly to cool.
Using a press, apply a preload of 1.5 tonnes to bearing 7.
Rotate the front casing during this process. With the pre-
load still applied, fit split ring 3 onto the shaft. Using a feeler
gauge, measure the gap between bearing 7 and the split
ring.
Remove the split ring and fit washer 4 with thickness 0.05 -
0.2 mm (0.002 - 0.008 in) greater than the measured gap.
Refit the split ring and remove the load.
Check that the shaft rotates in the front casing.
The remainder of the assembly procedure is as described on
the previous page.
13 - 7
S276770A
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