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23
7.
Troubleshooting Guide
Problem
Cause
Solution
Motor does not run. 1. Blown fuse or circuit breaker
2. Incorrect voltage to motor
3. Bad wiring connections.
4. Motor up switch burned out.
5. Overhead limit switch burned out.
6. Motor windings burned out.
1.
Replace blown fuse or reset circuit
breaker.
2.
Supply correct voltage to motor.
3.
Repair and insulate all connections.
4.
Replace
switch.
5.
Replace
switch.
6.
Replace
motor.
Motor runs but
will not raise
hoist
.
1. Open lowering valve.
2. Pump sucking air
3. Suction stub off pump.
4. Low oil level
1. Repair or replace lowering valve.
2. Tighten all suction line fittings.
3. Replace suction stub.
4. Fill tank with ISO-
3
2 oil
Motor runs-will
raises unloaded
hoist
but will not
raise vehicle.
1. Motor running on low voltage
2. Debris in lowering valve.
3. Improper relief valve adjustment.
4. Overloading
hoist
1. Supply correct voltage to motor.
2. Clean lowering valve.
3. Replace relief valve cartridge.
4. Check vehicle weight and/or balance
vehicle weight on lift.
Lift slowly settles
down.
1. Debris in check valve seat.
2. Debris in lowering valve seat.
3. External oil leaks
1. Clean
check
valve.
2. Clean lowering valve.
3. Repair eternal leaks.
Slow lifting speed or
oil blowing out filler
breather cap
1. Air mixed with oil.
2. Air mixed with oil suction.
3. Oil return tube loose
1. Change oil to ISO-
3
2 oil
2. Tighten all suction line fittings.
3. Reinstall oil return tube.
Содержание AutoLift AL-167262
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