Dealer Service
31
MAN1331
(09/29/22)
Figure 21.
Gearbox Assembly
Vertical Shaft Seal Replacement
(Figure 21)
1.
Disconnect and remove the driveline from the
gearbox.
2.
Remove vent plug (24) and siphon gear lube from
housing through this opening.
3.
Remove gearbox stand from mower deck.
4.
Remove gearbox and pulley from gearbox stand.
5.
Remove vertical shaft seal (18). Replace with new
seal (see Seal Replacement, page 30).
Vertical seal should be recessed in housing.
Horizontal seal should be pressed flush with outside
of housing.
NOTE:
Distortion to seal cage or damage to seal lip
will cause seal to leak.
6.
Fill gearbox with SAE 80W or 90W gear lube until it
runs out the level plug.
7.
Assemble gearbox and pulley to gearbox stand.
Attach gearbox stand to mower deck.
Horizontal Leak Repair
(Figure 21)
1.
Disconnect and remove the driveline from the
gearbox.
2.
Remove vent plug (24) and siphon gear lube from
housing through this opening.
3.
If the leak occurred at either end of horizontal shaft,
remove oil cap (20) and/or oil seal (19). Replace
with new one (refer to Seal Replacement, page 30).
4.
Fill gearbox with SAE 80W or 90W gear lube until it
runs out the level plug.
Gearbox Disassembly
(Figure 21)
1.
Remove top cover (22) from housing. Turn gearbox
upside down and pour out remaining gear oil from
gearbox.
2.
Remove oil cap (20) (to be replaced).
3.
Remove snap ring (10) and shim (13) from input
shaft (3).
13 10
19
1
3
12
7
10
20
14
17
5
16
6
9
4
26
18
8
22
24
13
2
23
11
25
15
21
CD6090
27
1. Crown gear
2. Gearbox housing
3. Input shaft
4. Output shaft
5. Gear pinion
6. Bearing
7. Bearing
8. Protective flat washer
9. Cotter pin
10. Snap ring
11. Snap ring
12. Spacer
13. Shim kit
14. Castle nut
15. Castle nut M24 x 2
16. Shim kit
17. Flat washer
18. Oil seal (40 x 80 x 12)
19. Oil seal (35 x 72 x 10)
20. Cap
21. Snap ring
22. Top cover
23. Bolt M8 x 14mm
24. Breather plug
25. Cotter pin
26. Bearing
27. Ball bearing
