26
Dealer Service
MAN1313 (3/3/2021)
Figure 21
. Spindle Assembly
Disassemble Spindle
1.
Slide shaft (74.6), short spacer (74.1), lower bear-
ing (74.3), short bearing spacer (74.7), middle
bearing (74.5), and long spacer (74.4) out the bot-
tom of spindle housing (74.2).
2.
Remove upper bearing (74.3) from top of spindle
housing.
3.
Inspect parts and replace as needed.
Assemble Spindle
1.
Slide short spacer (74.1) and lower bearing (74.3)
over spindle shaft (74.6) with bearing seal facing
down.
2.
Slide short bearing spacer (74.7), middle bearing
w/o seal (74.5), and long spacer (74.4) over spin-
dle shaft (74.6).
3.
Insert spindle shaft with bearings and spacers into
spindle housing (74.2) from the bottom.
4.
Install upper bearing (74.3) over shaft with the seal
facing up.
5.
Install short bearing spacer (74.7) over shaft.
6.
Install sheave (38) with key (74.10) on shaft.
Secure with washer (74.9) and nut (74.8) torque to
110 lbs-ft.
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. Gearbox capacity is almost
4 pints.
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
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 Perma-
tex
®
Aviation 3D Form-A-Gasket or equivalent.
Leakage can occur at the vertical or horizontal gaskets
and shaft seals.
Leakage at the horizontal shaft gasket or seal can be
repaired without removing the gearbox from the mower.
4
1/2 NC Flange lock nut
28
1/2 NC x1.5 HHCS GR5
29
1/2 NC x 1.75 HHCS GR5
38
Sheave
74.1. Spindle spacer
74.2. Housing, cast
74.3. Bearing, 1" sealed
74.4. Sleeve, 1.03 X 1.25 X 2.72
74.5. Bearing, 1"
74.6. Spindle shaft
74.7. Sleeve, 1.01 X 1.50 X .34
74.8. Nut, 5/8 NC lock
74.9. Washer, 5/8 SAE flat
74.10. Key, 1/4 X 1/4 X 1.0
74.11. Grease fitting
77. Blade kit (high suction)
78. Cap screw, 5/8 NF x 2.5 GR5
79. Bell washer, 5/8 x 2.5 x .25
