Section F - Transmission
Wheel Hubs and Drive Shafts
Drive Shaft Assembly (left hand)
F - 11 F - 11
9803-9450-1
Dismantling
It is assumed that roadwheels are removed and the
machine is correctly supported.
Drain the oil from the chain case (see Section 3).
Remove the appropriate right hand hub assembly to gain
access to the shaft retaining bolt K
Wheel Hub Assembly
(right hand) ( T F-5).
Remove the seat base. Slacken the nuts securing the
upper motor mounting to the chain case. Screw in the
adjustment bolts to lower the mounting and thus slacken
the drive chains K
Adjustment ( T F-15).
Remove bolt 1, plain washer 2 and preload washer 3.
Remove drive sprocket 4. Release the drive chain from the
sprocket. Remove spring clip 5 and withdraw oil scraper 6
and spring 7 from inside the chain case.
Drift the axle shaft 8 out of the axle tube. Bearing 9 will
remain in the axle tube and can be removed separately if
necessary. The outer race of bearing 10 will also be left in
the axle tube and can be removed if necessary. Shaft seal
11 should be removed and discarded.
If fitted and if necessary, remove bolts 12 with washers 13
and remove twine cutter 14.
Inspection
Thoroughly clean and dry all components. Examine the
bearings and axle shaft for wear or damage. Renew as
necessary. Examine axle tube for wear of the bearing
bores.
Check oil scraper for wear, renew as necessary. Check
that oil holes in scraper, and in axle tube, are clear.
Assembly
When renewing wheel studs 15, 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 12 to the correct torque.
Lubricate outer bearing 10 and seal 11 with JCB Special
HP Grease before assembly. Inner bearing 9 should be
assembled without grease.
Press outer bearing 10 into axle tube ensuring that the
outer race is pressed fully home.
Assemble outer race of inner bearing 9 into axle tube.
Ensure it is pressed fully home.
Fig 8.
Fit the two halves of the oil seal installer A (825/10003)
around the axle shaft 8 and position a new oil seal 11, with
the seal lip facing inwards, against the installer. Slide axle
shaft 8 into the axle tube.
Fit oil scraper 6 with its spring 7 onto the dowels protruding
from the inner face of the chaincase and secure with spring
clip 5. Check that the scraper slides freely on the dowels.
Note: The short oil scraper fits against the front sprocket.
The long oil scraper fits against the rear sprocket.
Assemble the inner race of bearing 9 onto axle shaft 8 and
slide the sprocket 4 onto the splines of the axle shaft. Do
not fit the drive chain to the sprocket at this stage.
Note: The front sprocket should be assembled with its
boss away from the axle tube, as at X. The rear sprocket
should be assembled with its boss towards the axle tube,
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 to pull the axle shaft into the axle tube so that the
oil seal is fully installed. Release the assembly tool and
B A
A
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