Output Shaft Bearing Preload Shim Selection

OUTPUT SHAFT BEARING PRELOAD SHIM SELECTION
When assembling, the output bearing preload must be checked and/or adjusted if any of the following items have been replaced:
- Output shaft (rear carrier assembly)
- Output shaft bearings
- Transaxle case

SHIM SELECTION

Fig.147 Bearing Installation:

1. Install rear output shaft bearing cone and special tool 6618A (Fig. 147).

Fig.148 Special Tool Installed:

2. Install special tool 6618A (Fig. 148). Lightly tighten retaining screws. Screws should be below the plate surface, but do not snug screws.
3. Turn case over on arbor press so that the plate is resting on the press base.

CAUTION: The output shaft will extend through the hole of tool 6618A. Ensure your press table has clearance for the output shaft.

Fig.149 Shim Installation:

4. Install shim on output shaft (Fig. 149). Apply small amount of petrolatum onto the shim to hold it in place. Use the original shim as a starting point. If original shim is not available, use the thickest shim available. Refer to Output Shaft Rear Shim Chart for available sizes.

Output Shaft Rear Shim Chart:

Output Shaft Rear Shim Chart

Fig.150 Press Shaft Into Case:

5. Install output shaft/rear carrier into rear bearing. The shaft must be pressed into position. Use special tool MD-998911 (Disc) and C- 4171 and C4171-2 (Handle) to press shaft into rear bearing (Fig. 150).
6. Using special tools 6497 and 6498 install new output shaft nut. Do not reuse old output shaft nut. Tighten new output shaft nut to 271 Nm(200 ft-lbs).

Fig.151 Checking Turning Torque:

7. Check the turning torque of the output shaft (Fig. 151). The shaft should have 1-to-5 in-lbs of turning torque. If the turning torque is higher than 5 in-lbs install a thicker shim. If the turning torque is less than 1 in-lbs install a thinner shim. Make sure there is no end play.

CAUTION: Failure to stake shaft nuts could allow the nuts to back-off during use.

Fig.152 Staking Output Shaft Nut:

8. The new nut must be staked after the correct turning torque is obtained (Fig. 152). Use special tool 6639 to stake output shaft nut and special tool 6589 to stake transfer shaft.

Fig.153 Correctly Staked Nut:

Fig.153 Correctly Staked Nut