TROUBLE

CAUSE

REMEDY

Lift won’t raise at all

1. Stuck intake foot valve

2. Foreign matter clogging intake screen

3. Wrong motor rotation

1. Remove intake pipe & inspect & correct or replace foot valve

2. Remove intake pipe & clean

3. Match motor and pump rotation

Lift raises slow or won’t raise load

1. Motor not running to proper RPM

2. Wrong electric motor

3. Pressure relief valve set too low

4. Vehicle heavier than lift rated capacity

5. Restriction or pipe line too small

6. Oil valves not working properly

7. Incorrect oil viscosity

8. Foreign matter clogging intake screen

9. Improper positioning of up/down valve

1. Check wiring and voltage

2. Check specification.

3. Adapt pressure gauge, check operating pressure with valves closed and with them open, raising vehicle

4. Weigh vehicle at each axle, check specification

5. Check pipe size and specification

6. Check valves and handle operation

7. Change to proper oil

8. Remove intake pipe and clean

9. Re-set valve stem – Look for marks on top of stem & align to proper ports.

Motor stops, blown circuit breaker when lift reaches full stroke

1. By-pass valve not opening

2. Relief pressure set too high

3. Incorrect voltage to motor

4. Excessive amperage draw by motor

1. Replace pressure relief valve

2. Adjust relief valve

3. Check Voltage

4. Check wire size to amperage requirements

Lift won’t come down – or slow

1. Closed return valve

2. Improper position of up/down valve

1. Open valve

2. Re-set valve

Power unit making excessive noise

!. Coupling alignment

2. Pump pickup pipe sucking air)

3. Foot valve plugged

4. Relief valve making excessive noise

5. Pump shaft bushings tight

1. Re-adjust

2. Check suction side of pump air leaks

3. Clean screen and/or foot valve

4. Clean and/or replace

5. Replace pump