When the manual hoist suddenly interrupts during operation, the following targeted measures should be taken immediately, combined with component inspection, operating standards, and emergency measures, to ensure safety and equipment reliability:

1、 Troubleshooting and Handling of Component Malfunctions

Chain stuck or broken

Phenomenon: The chain may suddenly stop or break during operation, accompanied by abnormal noise.

handle:

Immediately stop the operation and check if the chain is tangled, deformed, or worn beyond the limit (if the diameter of the chain link is worn by 10%, it needs to be replaced).

Clean up foreign objects (such as mud, rust) in the gaps of the chain, and correct the deformed chain links.

If the chain breaks, it needs to be replaced as a whole and welding repair is strictly prohibited.

Damage to gear components

Phenomenon: Gear jamming, missing teeth or transmission failure, resulting in the inability to turn the handle.

handle:

Disassemble and inspect components such as gears and spline holes, and replace gears that are broken or severely worn.

Regularly lubricate the gears to avoid dry operation.

Brake system failure

Phenomenon: Heavy objects cannot stay or slide down on their own, which may be caused by worn brake pads or loose springs.

handle:

Adjust the brake screws to ensure sufficient friction between the brake pads and the ratchet.

Replace worn brake pads or springs and regularly test braking performance.

2、 Correcting operational violations

Overloaded use

Phenomenon: The calibrated load of the equipment does not match the actual load, resulting in chain breakage or gear damage.

handle:

Immediately stop the work and reduce the load to the rated range.

Strictly follow the rated load indicated on the equipment and overloading is strictly prohibited.

Diagonal or winding

Phenomenon: The chain direction is incorrect or tangled, resulting in jamming or equipment overturning.

handle:

Adjust the chain direction again to ensure vertical suspension and no twisted links.

Avoid standing under the load or within the rotation range of the crane arm.

Environmental factors have an impact

Phenomenon: Damp and corrosive environment leads to component rusting, and high temperature baking accelerates wear.

handle:

Clean the internal dust after outdoor work and store in a dry environment.

Regularly apply rust proof oil to prevent components from getting damp and rusting.

3、 Emergency response and follow-up measures

Immediate shutdown and isolation

When stuck or making abnormal noises, stop the operation to avoid forcefully pulling and causing more serious damage.

Designate a warning area to prevent unrelated personnel from approaching.

Professional maintenance and testing

If the internal structure is damaged (such as missing or broken gears), contact professional personnel for disassembly and repair, and do not disassemble it yourself.

After maintenance, conduct a no-load test to confirm reliable braking and normal operation before putting it into use.

Record and report

Fill in the operation log to record information such as load weight, operation time, equipment status, etc.

If design defects or frequent malfunctions are found, report to superiors and take corrective measures (such as replacing equipment models).

4、 Preventive measures and daily maintenance

regular inspection

Check the wear and tear of components such as chains, hooks, and gears every month, and replace damaged parts in a timely manner.

Test the sensitivity of the braking device to ensure that the heavy object can be stopped at any height.

Cleaning and lubrication

Clean the surface dust and oil stains after use, and keep the components clean.

Regularly add lubricating oil to moving parts such as chains and gears to reduce wear and tear.

Storage management

When not in use for a long time, clean and apply rust proof oil, and store in a dry, ventilated, and non corrosive gas environment.

Avoid using a manual hoist as a fulcrum or throwing equipment.

The main equipment produced by Hebei Makita: stage electric hoist, electric chian hoist, wire rope electric hoist，Hand chain hoist, lever hoist, pneumatic hoist and other lifting equipment