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76 Workshop Manual, TSD3450E, Issue 1
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5 Remove the rocker lever and rocker shaft assemblies, Operation 3-2. If the camshaft gear (C2) is to be
removed, slacken the six retaining bolts before the removal of the rocker lever and rocker shaft assemblies.
6 Remove the camshaft gear (C2), if relevant. Use the guide stud, GE50019. If the gear case is to be removed,
the camshaft gear should be removed at this stage.
Caution: Do not rotate the crankshaft with the camshaft gear or any of the idler gears removed and the rocker
shaft assemblies installed. Damage can be caused to the pistons and valves, or to both.
7 Remove the three bolts and the thrust plate (C3) and remove the adjustable idler. Discard the bolts.
8 Check the condition of the bearing in the gear. Renew the bearing if it is worn or damaged.
9 Remove the three bolts and the thrust plate (C4) and remove the main idler. Discard the bolts.
10 Check the condition of the bearing in the gear. Renew the bearing if it is worn or damaged.
11 Remove the four bolts and the thrust plate (C1) and withdraw the compound idler. Discard the bolts.
12 Check the condition of the bearing in the gear. Renew the bearing if it is worn or damaged.
Note: If the nuts for the adjustable idler axle are loosened, the backlash for the camshaft gear and main idler
gear will have to be adjusted during the assembly operation. Refer to Operation 3-11.
13 Check the condition of the shaft for the adjustable idler. If the bearing diameter of the shaft is worn or
damaged, remove the nuts and bolt and renew the assembly. Apply thread lock compound, 21820 117, to the
bolt and five studs, fit the bolt and nuts and tighten to a torque of 50 +/- 10 (37 +/- 7 lbf ft).
14 Check the condition of the shaft for the main idler. If the bearing diameter of the shaft is worn or damaged,
remove the nuts and bolt and renew the assembly. Apply thread lock compound, 21820 117, to the bolt and
five studs, fit the bolt and nuts and tighten to a torque of 50 +/- 10 (37 +/- 7 lbf ft).
15 Check the condition of the shaft for the compound idler. Renew the shaft if the bearing diameter is worn or
damaged. If the shaft is removed, renew the five bolts which retain the shaft. Apply thread lock compound,
21820 117, to the bolts and tighten to a torque of 50 +/- 10 (37 +/- 7 lbf ft).
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