47
14 - Wheel System, Non-Traction
Removal and Installation
Rear Wheel Bearings and Seal
The rear wheel bearings are sealed and do not require
lubrication Severely worn bearings may be detected
by wheel wobble or grinding sounds A less obvious
symptom of bearing failure is when the wheel easily
freewheels when spun by hand with the machine
elevated off the ground A good sealed bearing should
have a slight but smooth resistance to freewheel
The wheel bearings are pressed into the wheel hub To
complete this procedure, you will need a bearing puller
and a press There are many different types of bearing
pullers that will operate on the internal bore of a bearing
(35mm in this case) As one example, a pilot bearing
puller is shown to the right
WARNING: Never work under a machine without safety
stands or blocking to support the machine.
1 To reduce the weight of the machine, drain
both the recovery and solution tanks
2 Carefully pry off the wheel hub cover (not
shown)
3 Jack the rear of the machine and block both
sides of the machine at the rear lifting points
(A)
near the wheels to keep the machine
stable and prevent it from rolling
4 Remove the bolt
(B)
and washer
(C)
that
secure the wheel to the axle, and remove the
wheel
5 Using a seal puller or similar means, pull the
inboard seal
(F)
from the wheel hub
•
The act of removing the seal will destroy
the seal You must replace the seal with a
new one
6 Using a suitable bearing puller, remove both the inboard and outboard bearings
(E)
7 Press new bearings into the hub Make sure to press along the outer race (72mm Ø) to avoid damaging
the bearing
8
Press a new inboard seal into the hub, and apply a light film of grease to the seal lip.
9 Reinstall the wheel
F
E
E
D
C
B
A
