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13. Apply a thin coat of Permatex to shaft area where
sleeve will seat.
14. Install sleeve 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.
15. Be careful not to overtighten bearings. Proper
bearing adjustment is essential to good bearing
life.
16. If you overtighten bearings, hold spindle housing
and rap spindle shaft with a lead hammer.
17. Carefully press top seal in with spring up. Top seal
should be flush with or to within 1/16" above the
housing.
18. Rotate housing on spindle shaft, checking for free
movement.
19. Install grease fitting in spindle shaft.
Spindle Installation
NOTICE
■
Pulley installation sequence is very important
for bearing life. Follow the sequence exactly.
1. Install spindle through bottom of mower and secure
with four mounting bolts.
2. Install pulley and split taper bushing with integral
key on spindle shaft. Make sure bushing is in
contact with sleeve on spindle shaft.
3. Alternately tighten split taper bushing cap screws
to 12 lbs.-ft.
4. Install toothed lock washer and nut on spindle
shaft. Tighten nut until snug. Do not tighten this nut
with wrench. Bearing damage will result from over-
tightening. Bend up edge of lock washer.
GEARBOX SERVICE
Gearbox Removal from Mower
1. Disconnect and remove the rear driveline from the
gearbox.
2. Remove vent plug and siphon gear lube from
housing through this opening.
3. Remove gearbox stand (20) from mower deck by
removing four flanged lock nuts (56).
4. Remove four cap screws (43) and washers (42)
and remove shield (22) from gearbox.
5. Remove castle nut and hardware from output shaft
of gearbox.
6. Remove sheave (19) from gearbox.
MAN0826 (8/31/2010)
7. Remove four bolts (63) and lock nuts (59) that
Gearbox Repair
Read this entire section before starting any repair.
Many steps are dependent on each other.
Fill gearbox with SAE 80W or 90W gear lube until it
runs out the side level plug.
Repair to this gearbox is limited to replacing bearings,
seals, and gaskets. Replacing gears, shafts, and a
housing is not cost effective. It is more economical to
(Figure 17)
purchase a complete gearbox if repair to anything other
than replacement of bearings, seals or gaskets is
required.
Inspect gearbox for leakage and bad bearings.
Leakage is a very serious problem and must be cor-
rected immediately.
Bearing failure is indicated by excessive noise and
side-to-side or end play in gear shafts.
Seal Replacement
Recommended sealant for gearbox repair is Permatex
Aviation 3D Form-A-Gasket or equivalent.
attach gearbox to gearbox stand and remove
gearbox.
19. Sheave, offset 13.25 PD
20. Gearbox stand
22. Shield, counter cone
42. Washer, flat standard 5/16
43. Screw, HHCS 8mm x 1.25P x 16mm
56. Nut, flanged lock 1/2 NC
59. Nut, flanged lock 5/8 NC
63. Screw, flanged hex head 5/8 NC x 1-3/4
Figure 17. Gearbox Stand Assembly
Dealer Service 29
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