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Greasing the Front Caster
Pivots
Service Interval: Yearly
Grease type: Lithium or molybdenum grease
1.
Remove the dust cap and adjust the caster
pivots; refer to
Adjusting the Caster-Pivot
Bearing (page
44).
Note:
Keep the dust cap off until you have
finished greasing the caster pivots.
2.
Remove the hex plug.
3.
Thread a grease fitting (1/4 inch–28 taper
thread) into the hole.
4.
Pump grease into the fitting until it oozes out
around the top bearing.
5.
Remove the grease fitting from the hole.
6.
Install the hex plug and dust cap.
Greasing the Caster-Wheel
Hubs
Service Interval: Yearly
Grease type: Lithium or molybdenum grease
1.
Park the machine on a level surface, disengage
the PTO, and engage the parking brake.
2.
Shut off the engine, remove the key, and wait
for all moving parts to stop before leaving the
operating position.
3.
Remove the caster wheel from the caster forks.
4.
Remove the seal guards from the wheel hub
(Figure
47).
Figure 47
1. Seal guard
5.
Remove 1 spacer nut from the axle assembly in
the caster wheel.
g006115
2. Spacer nut with wrench
flats
Note:
Thread-locking adhesive has been
applied to lock the spacer nuts to the axle.
Remove the axle (with the other spacer nut still
assembled to it) from the wheel assembly.
6.
Pry out the seals, inspect bearings for wear or
damage, and replace them if necessary.
7.
Pack the bearings with a general-purpose
grease.
8.
Insert 1 bearing and 1 new seal into the wheel.
Note:
You must replace the seals.
9.
If both spacer nuts in the axle assembly
have been removed (or broken loose), apply
a thread-locking adhesive to 1 spacer nut,
threading it onto the axle with the wrench flats
facing outward.
Note:
Do not thread the spacer nut all of
the way onto the end of the axle. Leave
approximately 3 mm (1/8 inch) from the outer
surface of the spacer nut to the end of the axle
inside the nut.
10.
Insert the assembled nut and axle into the wheel
on the side of the wheel with the new seal and
bearing.
11.
With the open end of the wheel facing up, fill
the area inside the wheel around the axle full of
general-purpose grease.
12.
Insert the second bearing and the new seal into
the wheel.
13.
Apply a thread-locking adhesive to the second
spacer nut, threading it onto the axle with the
wrench flats facing outward.
14.
Torque the nut to 8 to 9 N∙m (71 to 80 in-lb),
loosen it, then torque it to 2 to 3 N∙m (20 to 25
in-lb).
Note:
Make sure that the axle does not extend
beyond either nut.
15.
Install the seal guards over the wheel hub and
insert the wheel into the caster fork.
16.
Install the caster bolt and tighten the nut fully.
Important:
To prevent seal and bearing damage,
check the bearing adjustment often by spinning
the caster wheel. The wheel should not spin freely
(more than 1 or 2 revolutions) or have any side
play. If the wheel spins freely, adjust the torque
on the spacer nut until there is a slight amount of
drag, and apply thread-locking adhesive.
33
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