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Section A: Trouble Shooting
PowerMate
®
L1/L2 Series Model
Repair Manual
Switches
Both Switches Inoperative
A. Check and replace fuse if necessary with 30A automotive fuse.
B. Test battery and or batteries.
C. Wiggle and visual test of wiring for loose, pinched or broken wires.
D. Motor brushes
One Switch Inoperative
E. Bypass Switch: Cross the two terminals on the bottom of the suspect switch with a wrench or screwdriver. If
the machine works, switch is faulty. See Switch/Charge Plug replacement. Continue troubleshooting relay and
solenoids if the machine is still inoperative.
Relay and Solenoids
A. Bypass Relay: **Special Note: When performing this test, do not push both push button
switches at the same time.
Remove two wires (refer to diagram) and join together. Push the suspect switch. If the
switch works, the relay is faulty. See Relay Replacement. Continue troubleshooting if the
machine is still inoperative.
B. Bypass Solenoid: **Special Note: This is a test that will require two people.**
This test also requires one 6-8” length of 10G wire. The solenoid(s) to be tested will be determined by the type of
machine and the suspect switch (open or close), refer to appropriate diagram.
iii. L-Series Open switch (wheels up/load down) 2 solenoids bottom of the pack
iv. L-Series Close Switch (wheels down/load up) 2 solenoids top of the pack
1. Depress and hold down the suspect switch.
2. Take the 10G wire and make contact on the large posts of one of the two solenoids. If the machine operates, the
solenoid is faulty. See Solenoid Replacement. If the machine is still inoperative repeat steps on the next solenoid.
**NOTE: Though slight, there is a possibility of both solenoids inoperative, check both.
Machine Will Not Lift a Load
Drive Screw Spinning
A. Ballnut locknut is too loose. To tighten see Ballnut Locknut Adjustment.
B. If the above does not solve the problem, the ballnut will have to be replaced. See Ballnut Replacement.
Drive Screw NOT Spinning
C. If the motor is spinning but not the drive screw:
1. L-Series : Check brake assembly kit and replace if damaged. See Brake Assembly Replacement.
Also, if the brake assembly is damaged check and ensure the drive screw is still connected to the motor.
2. Check roll pin in the coupling. Replace if sheared or misshapen.
3. Check coupling and replace if stripped.
4. Check motor spline and replace if stripped.
D. If the motor is not spinning, check the battery and replace if necessary.
A
B
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