127180 4-13 REV A
Caster Fork with Tapered Bearings Replacement
NOTE: A 1/4”–28 straight thread zerk fitting (not provided)
is required for replacing the grease.
Disassembly:
1. Raise the front of the mower enough to remove the
caster wheel assembly.
2. Place mower securely on jack stands and do not allow
mower to move. Chock the drive wheels.
3. Remove the top cap and the top lock nut. Figure 4-24
4. Remove the caster fork from the machine.
5. Remove and retain the cup washers.
6. Remove and discard the seal.
7. Remove and discard the tapered roller bearings and
outer races.
8. Remove and retain the grease port plug.
Assembly:
1. Insert the 1/4”–28 straight thread zerk fitting into the
grease port and tighten.
2. Apply a light coating of grease to the caster pocket
before installing the outer bearing races.
3. Use the Hustler
®
Bearing Race Installation Kit (p/n
124351) to install the outer races into the caster
pocket bore.
4. Insert the Bearing Race Installation tool through the
backing plate and the caster arm housing.
5. Align a bearing outer race over the Bearing Race
Installation tool and into the caster arm housing. Make
sure that the race’s thick edge is the leading edge
going into the caster arm housing.
IMPORTANT: Do not use the bearings to press the
races into place.
6. Install the pressing tool, washers and the nut, then
slowly start to draw the race into the caster arm
housing.
A. Pump fan blades
B. Hydraulic pump
C. Cap screw (2)
D. Key
E. Set screw (2)
F. Place anti-seize here
G. Pumpside coupling
H. Spider gear
I. Gasket
J. Jackshaft assembly
K. Fitting
L. Fitting
M. Nylon tube
N. Contacting surface
O. Locate set screw hole
through this hole.
P. Set screw hole
Figure 4-23
• Use only certified jack stands.
• Use only appropriate jack stands, with a min-
imum weight rating of 2000 pounds (907 kg)
to block the unit up.
• Use in pairs only.
• Follow the instructions supplied with the
jack stands.
A. Top cap B. Top lock nut
Figure 4-24
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