Dismantling (cont’d)
5 Place a receptacle of a volume greater than 1.7 litres
(0.37 gal) under the bench. Turn the gearbox assembly
over so that cover 8 is underneath. Remove the socket
head plugs 33 and let the oil drain completely.
6 Turn the gearbox assembly so that cover 8 is
uppermost. Inscribe alignment marks on hub 1 and
cover 8.
7 In the groove between cover 8 and hub 1, locate the gap
in ring 18. Horizontally in line with the ring (i.e. 7 mm
(0.27 in) from the top of the hub rim) and at a point 20
mm (0.8 in) from the gap, produce a punch mark.
8 Using the punch mark as a guide, drill a 2 mm (0.0008
in) diameter hole into the hub. Drill until the bit touches
ring 18.
8 - 2
Section F Transmission
9803/6020
Section F
8 - 2
Issue 1
Track Gearbox
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