CHAINS AND IDLER SHAFTS
SUBSECTION 4E
Figure 4E-1. Chain Case and Idler Shaft (2100J1389 and 2100J515F1)
1. Inspect the bearing for wear or damage. Replace if
IDLER SHAFT (2100N515F1)
necessary.
REMOVAL AND DISASSEMBLY. To remove and disassem-
2. Check for wear on the sides and on the working face of
ble the idler shaft, proceed as follows (see Figure 4E-2):
the sprocket teeth. Scratches, galls, grooves or visible
1. Remove the chain case cover, gasket and chain.
changes in tooth form are signs of wear. Replace the
sprocket if necessary.
2. Separate the chain tightener yoke from lever arm.
3 Remove four capscrews and lever arm.
3. Check the sprocket teeth for accumulations of dirt or
foreign materials and for evidence of corrosion.
4. Reach inside the chain case and remove the idler
4. Check the lever arm for corrosion in area where it enters
sprocket and shaft.
the gear case. Clean or replace as necessary.
5. Remove O-ring from shaft. Discard O-ring.
5. Install the bearing into the sprocket and secure with the
6. Remove sprocket retaining ring and slide bearing and
bearing retaining rings.
sprocket off the shaft.
6. Install the bearing on the shaft and secure with the
7. Remove one of the bearing retaining rings from the
sprocket retaining ring.
sprocket and press or tap the bearing out of the sprocket.
7. Lubricate the O-ring and install on the shaft.
INSPECTION AND REPAIR. Prior to assembly, inspect the
idler parts as follows:
8. Lubricate the bearing before installation.
