Dealer Service
17
MAN1261 (4/11/2018)
2.
Place bottom bearing cone (4) into spindle with taper positioned to mate
with cup (6).
Figure 17
. Spindle and Shaft Assembly
NOTICE
■
Improper positioning of seals can cause seal damage. An improp
-
erly installed seal will leak and could cause bearing failure.
3.
Identify the open side of the seal (3) containing the spring.
4.
Apply a thin coat of Permatex to the area of housing where seals seat.
5.
Install bottom seal (3) with spring up toward center of housing.
6.
Place seal squarely on housing and select a piece of pipe or tubing with
an OD that will set on outside edge of seal. A tubing with an OD that is
too small will bow seal cage.
7.
Carefully press seal into housing, to prevent distortion to metal seal cage.
Bottom seal should seat firmly and squarely against machined shoulder
in housing.
8.
Make sure seal lip did not roll under. Distortion to seal cage or damage to
seal lip will cause seal to leak. Damaged seals must be replaced.
9.
Insert shaft (7) through bottom of housing (5).
10.
Fill housing cavity with a medium grade grease.
11.
Install top bearing (4) on shaft (7) to mate with top cone (6).
12.
Apply a thin coat of Permatex to shaft area where sleeve will seat.
13.
Install sleeve (2) on shaft and press sleeve and bearing into housing until
all free play is removed and there is a very light drag on bearings (similar
to adjusting front wheel bearings on an automobile). Check by spinning
spindle. It should turn freely.
14.
Be careful not to overtighten bearings. Proper bearing adjustment is
essential to good bearing life.
15.
If you overtighten bearings, hold spindle housing and rap spindle shaft
with a lead hammer.
16.
Carefully press top seal (3) in with spring up. Top seal should be flush
with or to within 1/16" above the housing.
17.
Rotate housing on spindle shaft, checking for free movement.
18.
Install grease fitting (17) in spindle shaft.
Spindle Installation
NOTICE
■
Pulley installation sequence is very important for bearing life. Fol
-
low the sequence exactly.
1.
Install spindle through bottom of mower and secure with four mounting
bolts.
2.
Install pulley (12) and split taper bushing (13) with integral key (14) on
spindle shaft. Make sure bushing is in contact with sleeve on spindle
shaft.
3.
Alternately tighten split taper bushing cap screws to 27 N-m.
4.
Install lock washer and nut on spindle shaft. Tighten nut until snug, but do
not over-tighten. Check shaft to make sure it spins freely.
.
Figure 18
.
Gearbox Assembly
GEARBOX REPAIR
Read this entire section before starting any repair. Many steps are dependent
on each other.
2. Sleeve
3. Seal
4. Bearing Cone
5. Spindle Housing
6. Bearing Cup
7. Spindle Shaft & Crossbar
17. Grease fitting
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
14. Castle nut
15. Castle nut M24 x 2
16. Shim
17. Flat washer
18. Oil seal (40 x 80 x 12 mm)
19. Oil seal (35 x 72 x 10 mm)
20. Cap
21. Snap ring
22. Top cover
23. Bolt M8 x 14 mm
24. Breather level plug
25. Cotter pin
26. Bearing
27. Ball bearing