9 - 3
Transmission (cont'd)
Adjusting the Drive Chain Tension
Note: The drive chains on machines after serial no. 676702
are pre-tensioned during manufacture and there is no
provision for routine adjustment in service. These machines
are fitted with a different style hub as shown at Y. Refer to
Wheel Hub Assembly Removal and Replacement
(SECTION F) for initial setting procedure.
1 Park the machine on firm level ground.
2 Stop the engine and remove the starter key.
3 Jack-up the left side of the machine, positioning the jack
under the centre of the chain case between the wheels.
Support the machine on blocks.
Note: Ensure that the jack is capable of lifting at least 3000
kg (3 tons).
4 Remove the rear wheel.
5 Adjust the tension as described below.
a Loosen the six bolts B securing the hub locking ring
C.
b Using a large adjustable spanner, grip the lug on hub
D, rotate the hub until no further movement is
possible. Mark this position as at X.
c Back off the tension so that the mark on the hub is
3.5 to 4.0 mm back from that on the locking ring as
shown.
d Re-tighten the six bolts of hub locking ring C to a
torque of 98 Nm (72 lbf ft, 10 kgf m).
6 Refit the rear wheel, tightening the bolts to the correct
torque (see page 3/9 - 3).
7 Repeat steps 3 to 6 for the front wheel.
8 Repeat steps 3 to 7 on the right side of the machine.
Section 3
Routine Maintenance
9803/8500
Section 3
9 - 3
Issue 6
Note: This diagram shows the left side rear wheel removed for adjusting the rear axle chain tension. Other wheels are dealt with
in a similar manner.
174370
XX
DD
BB
CC
S256270
YY
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