Inspection

1. Inspect the gear surface and bearing surface for wear and damage, then measure the mainshaft at points A, B. and C.
- Standard:
A (Ball bearing surface): 27.987 - 28.000 mm (1.1018 - 1.1024 inch).
B (Needle bearing surface): 37.984 - 38.000 mm (1.4954- 1.4961 inch).
C (Ball bearing surface): 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: 27.940 mm (1.1000 inch).
- If any part of the mainshaft is less than the service limit, replace it 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.

3. Rotate two complete revolutions. If the runout is more than the service limit, replace the mainshaft with a new one.