Yamato 302, Manual, Page: 22 / 30

B. INSpECTION
1. When draining gear oil, check for water in gear case. If oil appears white, replace oil
seals and O-ring.
2. Inspect gear for wear, pitting and full contact. If gears are not in full contact, shaft
may be bent or shim adjustment is incorrect.
3. Check all bearings for wear.
C. REASSEMBLY
1. Assemble in reverse order.
2. Press needle roller bearing (G-2) 41 mm (1.614") from top of gear case housing.
3. Add or remove shim (G-13, -15) to adjust up and down movement of pinion shaft.
There should be no bind and only a slight perceptible end play.
4. Back lash of gear should be between 0.1 to 0.15 mm (0.004 to 0.01"). Adjust by
adding or removing shims (G-26).
5. Torque pinion shaft nut 30 ~ 34 Nm (300 ~ 350 Kg cm / 22 ~ 25 ft lbs).
6. When replacing tail cap assembly, coat threads and body of tail cap with graphite
grease.
7. Torque tail cap 64 ~ 73 Nm (650 ~ 750 Kg cm / 47 ~ 55 ft lbs).
8. Fill gear case with a good quality gear oil (GO 90). Fill to boss located inside the
gear case. Allow the oil to settle into the bearings. When the air bubbles stop refill to
the boss. DO NOT OVERFILL.
– 19 –