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 SCFM or PSIG. Check PSIG (bar) at valve inlet. Refer to “SPECIFICATIONS” section for correct
SCFM (cu.m/min) and PSIG (bar).
Valve or throttle lever sticking.
Check throttle lever for free movement.
Pendant malfunction.
Check PSIG (bar) at pendant. Minimum operating pressure in pendant line is 55
psig (3.8 bar).
Hoist is overloaded.
Reduce load to within rated capacity.
Motor is damaged.
Repair or replace. See “MAINTENANCE” section.
Lubricator is low on oil.
Fill lubricator.
Brake is not releasing.
Check brake release circuit and PSIG (bar) at the brake inlet. (55 PSIG (3.8 bar)
minimum).
Load continues to move when hoist is
stopped. “UP” direction.
Valve or throttle lever sticking.
Check throttle lever for free movement.
Dump valves not releasing.
Check pendant hose dump valves.
Pendant lever sticking.
Check lever and restore free movement.
Load continues to move when hoist is
stopped. “DOWN” direction.
Valve or throttle lever sticking.
Check throttle lever for free movement.
Dump valves not releasing.
Check pendant hose dump valves.
Brake is slipping.
Check brake springs and brake disc linings for wear. See MAINTENANCE” section.
Hoist is overloaded.
Reduce load to within rated capacity.
Pendant lever sticking.
Check lever and restore free movement.
Hoist will not lift rated capacity.
Hoist is overloaded.
Reduce load to within rated capacity.
No air supply to hoist, or too little SCFM or PSIG. Check PSIG (bar) at valve inlet. Refer to “SPECIFICATIONS” section for correct
SCFM (cu.m/min) and PSIG (bar).
Main air valve travel is restricted.
Check throttle lever and linkage for free movement.
Exhaust restricted.
Inspect vents and replace mufflers.
Motor is damaged.
Check for worn motor bearings, vanes or vane springs.
Reduced speed and/ or capacity.
Old style hoists have filter in inlet nipple which
may be plugged restricting air flow.
Install new style inlet nipple with no filter screen.
Hook lowers, but will not raise.
No air supply to hoist, or too little SCFM (cu.m/
min).
Check power supply and connections, in power supply line.
Hoist is overloaded.
Reduce load to within rated capacity.
Pendant malfunction.
Check PSIG (bar) at air inlet connection on pendant.
Hook can be raised but not lowered.
Brake piston seals leaking.
Install new seals refer to “MAINTENANCE” section.
Low air pressure.
Check PSIG (bar) at valve inlet. Raise pressure to rated capacity.
Pendant malfunction.
Check PSIG (bar) at fitting connection on pendant.
Load chain jumps on sheave or is making a
snapping sound.
No oil on load chain.
Lubricate load chain. See “LUBRICATION” section.
Worn or rusted chain.
See “INSPECTION” to determine wear limit. Replace if necessary and lubricate
frequently.
Worn load sheave.
Replace worn parts.
Capsized Hook.
Correct as described in “MAINTENANCE” section.
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.
Trolley won’t stop or trolley wheels slip.
Damaged beam.
Repair or replace beam.
Too much 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 “INSTALLATION” section.
Air powered trolley does not operate.
Pendant lever sticking.
Check lever and restore free movement.
No air supply to trolley, or too little SCFM (cu.m/
min) or PSIG (bar).
Check PSIG (bar) at trolley valve.
Control valve is sticking.
See “MAINTENANCE” section.
Form 47099007 Edition 3
5
