TM
55-1730-229-34
AG
320A0-MME-000
TO
35C2-3-473-2
TM
1730-34/1
Table 4-2.
AGPU DOES NOT DRIVE WHEN SPEED/DIRECTION CONTROL ASSEMBLY HANDGRIPS ROTATED
34.
IN EITHER DIRECTION (CONDITIONS PROPER FOR OPERATION) (continued)
Set power switches off and disconnect battery. Inspect motor brushes.
step 4.
Replace brushes (paragraph 10-10) if required. Perform bench test. If new brushes do not
correct problem, replace motor (paragraph 10-10), and perform operational check.
Bench test traction motor.
Step 4.1.
a.
Remove traction motor (refer to TM 55-1730-229-34, paragraph 10-10).
b.
Clamp traction motor to a bench or install in an appropriate clamping device.
Obtain a battery or other 24-28 vdc power supply.
c.
d.
Connect a jumper wire from S1 to A2. Connect the negative lead from the power
supply to S2. Connect the positive lead from the power supply to A1. Apply 24-
28 vdc. Motor should run clockwise. Remove cables.
Connect a jumper wire from S1 to A1. Connect the negative lead from the power
e.
supply to S2. Connect the positive lead from the power supply to A2. Apply 24-
28 vdc. Motor should run counterclockwise. Remove cables.
f.
If motor does not operate properly, replace the motor.
If the motor operates properly, install motor (refer to TM 55-1730-229-34, para-
g.
graph 10-10). Go to step 4.2.
Step 4.2.
Check voltage adjustment on the motor controller.
NOTE
a.
Insure the AGPU switches and traction motor are set to the alternate propulsion mode
(see TM 55-1730-229-12. paragraph 2-10.b).
b.
Set the drive switch on and check that the drive lamp is illuminated.
2-20
Change 4
