Mainshaft Bearing Preload

If any of the following parts are replaced, adjust mainshaft bearing preload.
- Mainshaft
- Mainshaft bearings
- Clutch housing




1. Remove mainshaft rear bearing outer race and shim(s).




2. Reinstall mainshaft rear bearing outer race without shims.
3. Clean mating surfaces of clutch housing and transmission case with solvent.
4. Install mainshaft and mainshaft front bearing outer race into transmission case. Turn mainshaft while holding bearing outer race so that bearings are properly seated.




5. Place tools (bridge and gauging cylinder) onto machined surface of transmission case, allowing gauging cylinder to rest on surface of mainshaft front bearing outer race. Use proper screw in bridge to lock gauging cylinder in place.




6. Turn bridge over and place tool (gauging plunger) into gauging cylinder.




7. Place bridge, legs up, onto machined surface of clutch housing and allow gauging plunger to rest upon mating surface where mainshaft front bearing outer race fits.







8. Measure with feeler gauge distance between gauging cylinder and shoulder of gauging plunger.
9. Use feeler gauge reading to select correct mainshaft preload shim(s).
Mainshaft bearing adjusting shim: [1][2]Mechanical Specifications
10. Install selected mainshaft bearing adjusting shim and mainshaft bearing outer race.
11. Check total turning torque after assembly. Assembly