22Service Manual – SC900 20 - Wheel System, Traction
Drive Motor
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 and solution tanks to
reduce the weight of the machine.
2. Disconnect the main battery connector.
3. You will nd that access to the motor is
much easier with the right wheel removed
from the machine. Raise the right side of the
machine, and remove the drive wheel.
4. Disconnect the motor connector (A) and the
ground wire (B).
5. Using a 3/16" hex key, remove the two
screws (C) that secure the motor to the
transaxle.
• Due to the tight quarters, you may nd it easier to remove the upper screw rst.
• Support the motor before completely removing the last screw.
Replacement Notes
• Apply a small amount of grease to the drive coupling (D).
• The drive coupling is 2 pieces. Install the washer-side of
the coupling onto the motor shaft.
• Inspect the O-ring (F) to make sure it isn’t damaged, and
is in position in the O-ring groove.
• While inserting the motor back into the transaxle, rotate
the right axle (without the wheel) to align the spline on
the transaxle with the drive coupling.
C
A
B
D
E
F
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