24. SERVICE PROCEDURE 24.2.6 ADJUST IDLER CLEARANCE The idler moves forward and backward under external pressure. When this happens, side guide 1 and guide plate 2 become worn. As they become worn, there is side play in the idler, or the idler turns at an angle, causing the track to come off or resulting in uneven wear, so adjust as follows. Adjustment 1. Drive the machine for 1 – 2 m (3 – 7 ft) on flat ground, then measure clearance A (4 places: left, right, inside, outside) be- tween the track frame and side guide 1 . 2. If clearance A is more than 3 mm (0.1 in), remove bolt 3 , then take out shim 4 , and adjust so that the clearance on one side is less than 0.5 mm (0.02 in).
REMARK There are two types of shim (thickness: 0.5 mm (0.02 in) and 1.0 mm (0.04 in). 3-32