TROUBLESHOOTING
This section provides basic troubleshooting information. Determination of specific causes to problems are best identified by thorough inspections performed by
Ingersoll Rand
trained technicians. The chart below provides a brief guide to common hoist and trolley symptoms, probable causes and remedies.
SYMPTOM
CAUSE
REMEDY
Hoist will not operate.
No air supply to hoist, or too little CFM or psi. Check psi (bar) at hoist inlet. Refer to “SPECIFICATIONS”' section in Product
Information Manual for correct CFM (cu.m/min) and psi (bar).
Pendant lever sticking.
Check pendant lever and restore free movement.
Pendant malfunction.
Check psi (bar) at pendant. Minimum operating pressure in pendant line is 60
psi (4 bar).
Hoist is overloaded.
Reduce load to within rated capacity.
Motor is damaged.
Repair or replace. Refer to “MAINTENANCE” on page 6.
Limit switch sticking.
Check limit switch button moves freely. Clean and lubricate if sticking.
Brake is not releasing.
Check brake release circuit and psi (bar) at brake inlet [60 psi (4 bar) minimum].
Load continues to move when hoist is
stopped. "UP'' direction.
Pendant lever sticking.
Check lever and restore free movement.
Load continues to move when hoist is
stopped. "DOWN'' direction.
Pendant lever sticking.
Check lever and restore free movement.
Hoist is overloaded.
Reduce load to within rated capacity.
Brake is slipping.
Check brake springs and brake disc linings for wear. Refer to
“MAINTENANCE” on page 6.
Hoist will not lift rated capacity.
Hoist is overloaded.
Reduce load to within rated capacity.
No air supply to hoist or too little CFM or psi
(cu. m/min or bar).
Check psi (bar) at hoist inlet. Refer to “SPECIFICATIONS” section in Product
Information Manual for correct CFM (cu.m/min) and psi (bar).
Brake is not releasing.
Check brake release circuit and psi (bar) at brake inlet [60 psi (4 bar) minimum].
Exhaust is restricted.
Inspect vents and clean or replace muffler.
Motor is damaged.
Check for worn motor bearings.
Hook lowers but will not raise.
Hoist is overloaded.
Reduce load to within rated capacity.
No air supply to hoist or too little CFM or psi (cu.
m/min or bar).
Check at hoist power supply connection with hoist under load. Raise pressure to
rated capacity.
Pendant malfunction.
Check psi (bar) at air inlet connection on pendant.
Load chain jumps on sprocket or is making
a snapping sound.
Worn or rusted chain.
Refer to “INSPECTION” on page 2 to determine wear limit. Replace if necessary.
Incorrect chain.
Replace with correct chain.
Worn sprocket or chain guide.
Replace worn parts.
Capsized hook.
Correct as described in “MAINTENANCE” on page 6.
Hoist not in line with load.
Align hoist with load. Do not “yard” or “side pull”.
Incorrectly reeved load chain.
Check load chain is correctly reeved.
No oil on load chain.
Lubricate load chain.
Trolley (optional feature)
Trolley will not stop or trolley wheels slip.
Damaged beam.
Repair or replace beam.
Excessive oil, grease or paint on track of beam. Clean off oil, grease or paint.
Trolley not spaced for beam clearance.
Check trolley spacing. Refer to the manufacturer’s literature.
Air-powered trolley does not operate.
Pendant lever sticking.
Check lever and restore free movement.
No air supply to trolley or too little CFM or psi
(cu. m/min or bar).
Check psi (bar) at trolley inlet. Refer to manufacturer’s specifications.
Form MHD56279 Edition 4
5
