November 2016
Service and Repair Manual
Non-steer Axle Components
Part No. 1272220GT
GS-2669 DC • GS-3369 DC • GS-4069 DC
81
Non-steer Axl e Co mpon ents
9-1 Driv e M ot ors
9-1
Drive Motors
How to Remove a Drive Motor
The drive motors are AC powered and are a
brushless design requiring very little maintenance.
They have built-in speed and temperature sensors
which is monitored by the ground controls (GCON).
The speed sensor is a Hall-effect type and is part of
the rear motor shaft bearing. The temperature
switch will shut down the drive motor if it becomes
excessively hot.
1
Disconnect the battery pack from the machine.
Electrocution/burn hazard.
Contact with electrically charged
circuits could result in death or
serious injury. Remove all rings,
watches and other jewelry.
2
Chock both sides of the wheels at the steer
end of the machine.
3
Center a lifting jack under the drive chassis at
the non-steer end of the machine.
4
Loosen the wheel lug nuts. Do not remove
them.
5
Raise the machine approximately 2 inches / 5
cm. Place blocks under the chassis for
support.
Crushing hazard. The chassis
will fall if not properly supported.
6
Remove the wheel lug bolts. Remove the tire
and wheel assembly.
7
Remove the axle cover.
1 axle cover
2 drive hub
3 axle assembly
8
Tag and disconnect the electrical connectors
for the brake, speed and temperature sensors
at the drive motor.
9
Tag and disconnect the electrical connectors
for the oscillate limit switches.
10 Tag and disconnect the drive motor power
cables from the motor controller in the ground
controls compartment.
Note: The power cables will have to be pulled
through the drive chassis when the axle assembly
is removed.
