23Service Manual – SC900 20 - Wheel System, Traction
Motor Brushes
It is possible to replace the motor brushes without removing the motor from the transaxle, if you wish. This
is a decision you should make before you start, however, because one method requires removing the right
wheel and the other method removes the left wheel. Replacing the brushes is a relatively easy task, with the
exception being the access to the upper-front brush.
This procedure is written from the standpoint of leaving the motor in place.
WARNING: To avoid unexpected movement, disconnect the battery connector before servicing the
machine.
− Never work under the machine without safety stands or blocking to support the
machine.
− To avoid instability of the lifted machine, block the rear (caster) wheels so that the
weight of the machine is not on the caster wheels, which can pivot unexpectedly.
1. Drain the recovery tank and disconnect the
main battery connector.
2. Optional, but recommended: Raise the left
side of the machine and remove the left
wheel for easier access to the brush motor.
3. Unscrew the brush cap (A), and remove the
spring-loaded brush.
• For the upper 2 brush caps, you will need
to use a right-angle screw driver. If you
don’t have one compact enough for the
task, you can try using a coin in the cap’s
slot.
4. During replacement, t the brush all the
way into the motor and hold the contact (B)
with your nger. Then slide the cap (A) in
from the side, replacing your nger with the
cap to hold the brush. Carefully thread cap to prevent cross threading.
• Hint: To reduce the likelihood of cross threading, unscrew the cap slightly rst before screwing it in.
5. Repeat this for all 4 brushes.
A
B
A
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