6.3 Troubleshooting Guide
The following are suggestions to consider if you have problems with the
hoist
. Please call a qualified
hoist
technician
and/or a qualified electrician for further clarification and information.
HOIST WILL NOT RAISE
POSSIBLE CAUSE
REMEDY
INSTRUCTION
1. Air in oil, (1,2,8,13)
1. Check for proper oil level
The oil level should be up to the
bleed screw in the
2. Cylinder binding, (9)
2. Bleed cylinders
See Installation Manual
3. Cylinder leaks
internally, (9)
3. Flush- Release valve to get rid of
possible contamination.
Hold release handle down and start
unit allowing it to run for 15 seconds.
4. Motor run backward
under pressure, (11)
4. Dirty oil
Replace oil with clean Dexron ATF
5. Lowering valve
leaks, (3,4,6,10,11)
5. Tighten all fasteners
Tighten fasteners to recommended
torques.
6. Motor runs
backwards, (7,14,11)
6. Check for free movement of
release
If handle does not move freely,
replace bracket or
7. Pump damaged,
(10,11)
7. Check motor is wired correctly.
Compare wiring of motor to electrical
diagram on drawing.
8. Pump won’t prime,
(1,8,13,14,3,12,10,11)
8. Oil seal damaged or cocked
Replace oil seal around pump shaft.
9. Relief valve leaks,
(10,11)
9. See Installation Manual
Consult
Hoist
Manufacturer
10. Voltage to motor
incorrect, (7,14,11)
10. Replace with new part
Replace with new part
11. Return unit for repair
Return unit for repair
12. Check pump-mounting bolts
Bolts should be 15 to 18 ft. lbs.
13. Inlet screen clogged
Clean inlet screen or replace
14. Check wall outlet voltages and
wiring
Make sure unit and wall outlet are
wired properly.
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