Electric Chain Hoist Troubleshooting: Causes & Fixes

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Problems on this page:

Hoist will not lift Load drifting down Chain jumping or noisy Limit switches not stopping the hook Motor overheating Hook damage Pendant faults Trolley travel problems Hoist moving in the wrong direction Statutory inspection overdue

Hoist will not lift

Hits OEE: Availability

Symptoms: The hoist hums or does nothing when the up button is pressed.

Load above the rated capacity

Check the load against the capacity marked on the hoist; the overload device is stopping the lift.

Phase missing or wrong phase order

Check the supply and the phase order.

Brake not releasing

Check the brake coil and air gap.

Pendant or contactor fault

Check the pendant and the contactors.

Prevention: Pre-use checks by the operator before every shift.

Load drifting down

Hits OEE: Availability

Symptoms: The load creeps down when the hoist is stopped.

Brake worn or out of adjustment

Stop using the hoist and have the brake inspected by a competent person.

Brake contaminated with oil

Clean or replace the brake.

Slip clutch set too low

Have the clutch checked.

Load above capacity

Check the load.

Prevention: Brake checks in the statutory inspection; a drifting hoist is taken out of service.

Chain jumping or noisy

Hits OEE: Availability

Symptoms: The chain clicks, jumps on the sprocket or binds.

Chain worn or stretched

Measure the chain and replace it.

Chain twisted

Untwist and check the bottom hook.

Chain not lubricated

Lubricate as the maker says.

Chain guide worn

Replace the guide.

Prevention: Chain gauge check at each inspection.

Limit switches not stopping the hook

Hits OEE: Availability

Symptoms: The hook runs past the upper or lower stop.

Limit switch out of adjustment

Adjust and test the limits.

Switch failed

Replace the switch.

Chain stop missing

Fit the chain stop.

Wiring fault

Check the wiring.

Prevention: Limits tested before use.

Motor overheating

Hits OEE: Availability

Symptoms: The motor trips on thermal protection.

Duty cycle exceeded

Check the hoist duty class against the use.

Inching too often

Reduce inching.

Low voltage

Check the supply.

Brake dragging

Check the brake.

Prevention: Duty matched to the hoist at purchase.

Hook damage

Hits OEE: Availability

Symptoms: The hook is opened, cracked or the safety latch is missing.

Overload or side pull

Train operators not to side-pull.

Latch broken

Replace the latch.

Wear at the bearing surface

Measure the hook.

Hook not swivelling

Service the swivel.

Prevention: Hook inspection before each use.

Pendant faults

Hits OEE: Availability

Symptoms: Buttons stick or the pendant cable is damaged.

Cable damaged by dragging

Fit a strain relief and replace the cable.

Buttons worn

Replace the pendant.

Emergency stop not working

Test and repair immediately.

Water in the pendant

Use a sealed pendant.

Prevention: Emergency stop tested before use.

Trolley travel problems

Hits OEE: Availability

Symptoms: The trolley jerks, sticks or runs off the beam stops.

Wheels worn

Replace the wheels.

Beam flange width wrong

Set the trolley for the beam.

End stops missing

Fit end stops.

Drive fault on powered trolleys

Check the drive.

Prevention: Trolley checks in the planned inspection.

Hoist moving in the wrong direction

Hits OEE: Availability

Symptoms: Pressing up lowers the hook, or the limit switches do not stop the motion.

Phase order changed on the supply

Stop using the hoist and have an electrician correct the phase order, because the limit switches may not work in reverse.

Pendant wired wrongly after a repair

Check the pendant wiring against the hoist diagram.

Contactor wiring swapped

Check the contactor wiring in the control box.

Hoist moved to a new supply point

Test direction and limits whenever the hoist is connected to a new socket.

Prevention: Direction and limit test after any electrical work.

Statutory inspection overdue

Hits OEE: Availability

Symptoms: The hoist is in use without a valid thorough examination record.

No inspection reminder in the maintenance system

Add the examination interval your local lifting regulations require as a dated task.

Hoist moved between areas and lost from the register

Keep every hoist on a numbered lifting equipment register.

Inspection report not filed

File the report where operators and supervisors can see it.

Defects from the last report not closed

Track report defects as work orders until closed.

Prevention: A lifting equipment register reviewed monthly.

Guidance only. Always follow lockout/tagout and your site's safe-work procedures, and verify against OEM manuals before acting.

Related equipment guides: overhead crane · electric motor · electric forklift · gearbox

Stop the same fault coming back

Recurring electric chain hoist stops usually trace to a cause you cannot see by hand. The partner we recommend is Fabrico: it tracks OEE and downtime live from PLCs, IoT sensors or AI cameras; where cameras are fitted, the video of a stop sits next to its machine data so the cause can be reviewed; and a technician opens the work order from the stop in the same system. Data is hosted in the AWS EU region, and Fabrico and the company behind it hold ISO/IEC 27001, ISO/IEC 20000-1 and ISO 9001.

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Methods that cut recurring stops: the six big losses · root cause analysis · preventive vs predictive maintenance · TPM · SMED & changeover