Gear Case

Replacement Of Output Shaft Bearing Race
To Remove
1. Mount the gearcase in a press.





2. Press out bearing race with Sleeve, bearing drive axle 87 91 311.

To Fit





1. Turn the gearcase and fit the bearing race with a plastic hammer. Press in the new bearing race until it stops with Drift 83 90 312.
Use tool 87 91 188 as Support.

Replacement Of Input Shaft Bearing Race
To Remove





1. Remove the 4 screws from the seal retainer. Keep the seal retainer, screws and shims.





2. Press out the bearing race with Drift, sealing a differential bearing 87 90 800 and tool 87 92 236 as Support.


To Fit
1. Turn the gearcase and fit the bearing race in position using a plastic hammer.
2. Then, press down the bearing race with Sleeve 87 92 202 and Support removal pinion shaft 87 91 188 until the tool bottoms against the gearcase.





3. Fit the bearing retainer with a nominal shims combination of 1.5 mm. Tighten down the bearing race alternately with the bearing retainer.
Tightening torque 38 Nm (28. ft. lbs.)

Bushings For Selector Shafts In Gearcase
To Remove

IMPORTANT: Bushes should be tapped out before the gearcase is washed as the detergent can destroy the surface of the bushes.





1. Tap carefully using a Drift bush selector rod 87 91 238 to remove the 3 bushes in the gearcase and the bush for the selector shaft in the clutch housing.

To Fit

IMPORTANT: The reverse selector shaft has no bush in the gearcase.





1. The bushes are carefully tapped in using a Drift, bush selector rod 87 91 238.

Sintered Plug, Bleeding
To Remove





1. Tap out the sintered plug from the gearcase using a drift from the outside.

To Fit





1. Carefully tap in a new sintered plug from the mating surface (the sintered plug is tapered).

IMPORTANT: Use a hollow drift or piece of tube so that the surface of the sintered plug is not compressed (blocked). If the surface of the sintered plug is blocked, its air-porous properties are destroyed and the oil in the gearbox may be forced out.