Section F - Transmission
Wheel Hubs and Drive Shafts
Wheel Hub Assembly (right hand)
F - 8 F - 8
9803-9450-1
Remove bolt 1, plain washer 2 and preload washer 3.
Remove drive sprocket 4.
Support the casing assembly on its outer flange with the
wheel hub facing downwards and press out the axle shaft
assembly 5. Bearing 6 will remain in the casing 13 and can
be removed separately if necessary. The outer race of
bearing 7 will also be left in the casing and can be removed
if necessary. Shaft seal 8 should be removed and
discarded.
If fitted and if necessary, remove bolts 9 with washers 10
and remove twine cutter 11.
Inspection
Thoroughly clean and dry all components. Examine the
bearings, axle shaft and casing for wear or damage.
Renew as necessary.
Assembly
When renewing wheel studs 12, press fully into hub
making sure that there is no gap between the stud head
and the hub face.
!MWARNING
If, for whatever reason, a wheel stud is renewed, all the
studs for that wheel must be changed as a set, since
the remaining studs may have been damaged.
2-3-2-8
Assemble the twine cutter, if previously removed, and
tighten bolts 9 to the correct torque.
Lubricate outer bearing 7 and seal 8 with JCB Special HP
Grease before assembly. Inner bearing 6 should be
assembled without grease.
Press bearing 7 into casing 13 ensuring that the outer race
is pressed fully home.
Assemble outer race of bearing 6 into casing 13. Ensure it
is pressed fully home.
Fit the two halves of the oil seal installer A (825/10003)
around the axle shaft 5 and position a new oil seal 8, with
the seal lip facing inwards, against the installer. Feed axle
shaft 5 into the casing.
Assemble the inner race of bearing 6 onto axle shaft 5 and
slide sprocket 4 onto the splines of the axle shaft.
Note: The front sprocket should be assembled with its
boss towards the casing, as at X. The rear sprocket should
be assembled with its boss away from the casing, as at Y.
Screw threaded stud C of assembly tool B (825/10002)
fully into the end of the axle shaft as shown then continue
turning the stud to pull the axle shaft into the casing so that
the oil seal is fully installed. Release the assembly tool and
remove the oil seal installer. Note that it may be necessary
to gently tap the end of the shaft to release the installer.
Fig 5.
Reassemble tool B and continue pulling the axle shaft into
position by tightening stud C to preload the bearings.
Rotate the shaft during this process to seat the bearings.
Tighten stud C to 80 Nm (59 lbf ft, 8.2 kgf m). Rotate the
axle shaft 5 full revolutions to ensure that the bearings are
fully seated then recheck and, if necessary, tighten stud C
further to 80 Nm (59 lbf ft, 8.2 kgf m).
A
A
B
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