Mainshaft, Gear and Bearing

1. Inspect the gear surfaces and the bearing surfaces for wear and damage, then measure the mainshaft at points A, B. and C.
- Standard:
A: 27.987 - 28.000 mm (1.1018 - 1.1024 inch)
B: 37.984 - 38.000 mm (1.4954 - 1.4960 inch)
C: 27.977 - 27.990 mm (1.1015 - 1.1020 inch)
- Service Limit:
A: 27.940 mm (1.1000 inch)
B: 37.930 mm (1.4933 inch)
C: 27.930 mm (1.0996 inch)

NOTE: If any parts of the mainshaft are less than the service limit, replace the mainshaft with a new one.





2. Inspect for runout.
- Standard: 0.02 mm (0.0008 inch) max.
- Service Limit: 0.05 mm (0.002 inch)

NOTE: Support the mainshaft at both ends as shown. If the runout is more than the service limit, replace the mainshaft with a new one.