Input Gear/Bearing

Input Gear/bearing

Service repair No - 41.20.60

Disassembly





1. Make alignment marks between cover plate/bearing housing and main Casing.
2. Remove 5 bolts and stud nut securing cover/bearing housing to main casing- Remove cover and bearing housing.





3. Remove input gear assembly.





4. Remove and discard oil seal from main casing.





5. Drift out bearing track from main casing.





6. Drift out bearing track from housing and collect selective shim.





7. Position tool LRT-99-002 to vice.
8. Assemble tool LRT-41-003 to bearing, position input gear to hand press and remove bearing.
9. Repeat procedure for remaining bearing.

Reassembly
1. Clean input gear, cover/bearing housing and main casing.





2. Using tool LRT-99-002 and LRT-41-003 fit new bearings to input gear.
3. Using a suitable mandrel, fit bearing track to main casing.
4. Fit a 3.15 mm (0.12 in) thick shim to bearing housing and using a suitable mandrel fit bearing track to housing.
5. Position input gear to main casing.





6. Fit bearing housing, ensuring reference marks are aligned, secure bearing housing with 2 bolts and tighten to 25 Nm (18 lbf.ft).
7. Position dial gauge with stylus contacting input gear, push input gear rearwards and zero gauge.
8. Push input gear forwards and note gauge reading.
9. Calculate thickness of shim required using the formula - A + B + C = D
where:
A= Thickness of installed shim - 3.15 mm (0.12 in)
B= Recorded end-float.
C= Required pre-load - 0.05 mm (0.002 in).
D= Thickness of shim required.
10. If an alternative shim is required to establish correct pre-load, fit an alternative shim. Shims are available from 3.15 to 4.00 mm (0.12 to 0.16 in) thickness, in increments of 0.05 mm (0.002 in).
11. Remove 2 bolts, remove bearing housing and input gear.
12. Lubricate input gear and bearings with recommended oil.
13. Position input gear into main casing.
14. Apply sealant, Part No. STC 3254 to bearing housing and cover.
15. Position bearing housing/cover, align reference marks and tighten by diagonal selection to 45 Nm (33 lbf.ft).





16. Using tool LRT-37-014 fit new input shaft oil seal.