Page 896 - Workshop Manual - Aumark (BJ1051)

31A-16
Transmission (646b/651b)-transmission assembly

14. Remove the secondary-axle and first-shifting gear
attachment
(a). Remove the secondary-axle and first-shifting gear
attachment and the needle bearing.

15. Detect the secondary axle
(a). Measure the secondary-axle circular run-out.
Circular run-out
Model
Standard Limit
646B 0.03mm 0.10mm
651B 0.03mm 0.10mm

If the circular run-out is beyond the limit value, replace
the secondary axle.

(b). Measure the diameter of the secondary-axle
main-bearing journal.
Diameter of bearing
Position of bearing journal
31A journal Standard
1. 646B 52 mm
651B
2. 646B 57 mm
651B
3. 646B 64 mm
651B
4. 646B 57 mm
651B
5. 646B 40 mm
651B
6. 646B
651B 30 mm

If the diameter of the main-bearing journal is less than the
minimum valve, replace the secondary axle.

Page 896