Removal
Note: The input and output shafts may be removed from the upper crankcase after first separating the lower crankcase from the upper.
Note: The rear bearing on the input shaft remains in the crankcase on removal of the shaft.
1. Remove the engine from the frame as described on page 10.2.
2. Separate the lower crankcase from the upper as described on page 5.5.
Note: The output shaft may be retained in the lower crankcase on separation from the upper. If the output shaft is not retained in the lower crankcase, make a note of the position of each selector fork on the output shaft.
3. Lift the output shaft from the upper crankcase noting the orientation of each bearing and their circlips.
4. Remove the selector shaft and forks as described on page 8.7.
Note: The input shaft bearing housing fixings may not be reused but should be retained for use during installation of the input shaft.
5. Release the three Torx fixings securing the input shaft bearing housing to the upper crankcase.
![](https://motoinstruction.ru/img/triumph/7/114282.jpg)
1. Input shaft bearing housing; 2. Torx fixings
6. Insert two M6 bolts into the two threaded holes at the periphery of the bearing housing. Evenly and progressively tighten both bolts to draw the bearing housing from the crankcase.
![](https://motoinstruction.ru/img/triumph/7/114283.jpg)
1. M6 bolts; 2. Bearing housing
7. With the bearing housing released, withdraw the input shaft through the aperture for the bearing housing.
Installation
1. Locate the input shaft to the upper crankcase, installing it through the aperture for the bearing housing.
2. Fit the bearing housing into the aperture, by hand, as deeply as possible.
3. Using the old Torx fixings, draw the bearing housing into the upper crankcase until fully home. Remove and discard the Torx fixings.
4. Fit new Torx fixings to the bearing housing. Tighten them to 12 Nm.
5. Using a small punch, stake the Torx heads to the corresponding notches in the upper crankcase.
![](https://motoinstruction.ru/img/triumph/7/114284.jpg)
1. Torx fixings; 2. Notches; 3. Stake marks
6. Refit the selectors and shaft as described on page 8.9.
7. Refit the output shaft to the crankcase ensuring the snap-ring on the outside of the inner bearing locates in their corresponding groove in the crankcase.
![](https://motoinstruction.ru/img/triumph/7/114285.jpg)
Installing the output shaft
8. Assemble the crankcases as described on page 5.9.
9. Refit the engine to the frame as described on page 10.5.