When the running chain hoist (i.e. running chain hoist or running chain hoist) cannot be pulled, there may be multiple potential reasons involved. The following is a detailed analysis:

1、 Mechanical malfunction

Chain jamming or blockage

Reason: The chain may not be able to move freely due to excessive wear, deformation, or being stuck by foreign objects.

Inspection: Check the integrity of the chain to confirm if there are any twists, breaks, or obstacles blocking it.

Gear or ratchet mechanism malfunction

Reason: Gear wear, tooth damage, or stuck ratchet mechanism may result in power not being transmitted to the chain.

Inspection: Check the meshing of gears and ratchet wheels to confirm if there are any foreign objects or damage.

Bearing or shaft damage

Reason: Damaged bearings or bent shafts may increase rotational resistance and prevent the chain from being pulled.

Inspection: Manually rotate the relevant components and feel for any abnormal resistance or jamming.

2、 Overload protection

Overload limiter triggered

Reason: When the load exceeds the rated carrying capacity of the chain hoist, the safety device will activate to prevent further lifting.

Inspection: Confirm the weight of the load and check if the overload limiter has been triggered.

Brake not released

Reason: The brake may not be fully released due to malfunction or misoperation, causing the chain to be unable to move.

Inspection: Check the status of the brake and confirm if it is fully released.

3、 Operational issues

Improper operation method

Reason: Incorrect direction of handle operation or incorrect release of brake may cause the chain to fail to pull.

Check: Read the operation manual again to confirm if the steps are correct.

Wrong direction of handle or chain

Reason: The shaking direction of the handle does not match the movement direction of the chain, which may result in the inability to pull.

Check: Confirm the consistency between the direction of handle operation and the direction of chain movement.

4、 Insufficient lubrication and maintenance

Lack of lubrication

Reason: Key components such as gears and chains lack lubrication, resulting in increased friction and inability to move smoothly.

Inspection: Lubricate key components to reduce friction.

Long term lack of maintenance

Reason: The equipment has not been maintained for a long time, resulting in internal dust and rust, which affects normal operation.

Inspection: Regular maintenance and upkeep, cleaning of internal dust and rust.

5、 External factors

Load stuck or fixed

Reason: The lifted load may be stuck in a certain position or fixed by other objects, making it impossible to pull.

Inspection: Check the status of the load and confirm if there are any obstacles.

environmental factor

Reason: There may be obstacles in the work environment that hinder the movement of the chain, or environmental factors such as temperature and humidity that affect equipment performance.

Inspection: Clean the work area, ensure there are no obstacles, and consider the impact of environmental factors on the equipment.

6、 Equipment damage or aging

Internal components damaged

Reason: Internal faults such as spring breakage and bearing damage can cause the equipment to malfunction.

Inspection: Conduct professional maintenance, locate and replace damaged components.

equipment aging

Reason: Long term use leads to a decrease in equipment performance, which cannot meet work requirements.

Inspection: Evaluate the service life of the equipment and consider whether it needs to be replaced with a new one.

7、 Mistriggering of safety device

Safety locking device activated

Reason: Safety devices such as overload protectors and limit switches may be activated due to misjudgment, preventing the chain from moving.

Inspection: Check the settings and status of safety devices to confirm if there are any false triggers.

8、 Suggested solution steps

preliminary inspection

Confirm if the load is within the rated range.

Check the appearance and condition of components such as chains, gears, bearings, etc.

Confirm if the operation method is correct.

Thoroughly investigate

Conduct a detailed inspection of key components such as chains, gears, and ratchet wheels, and lubricate or replace them if necessary.

Check the settings of the safety device to ensure that it is functioning properly and not triggered incorrectly.

Evaluate the service life and maintenance records of the equipment to determine whether major repairs or replacements are needed.

Professional maintenance

If unable to resolve the issue on your own, promptly contact professional maintenance personnel for repair.

Avoid forced operation in case of equipment failure to prevent accidents from occurring.

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