Sudden interruption of manual hoist operation may be caused by component damage, chain jamming, brake system failure, improper operation, or environmental factors. The cause should be investigated based on specific phenomena. The following are specific reasons and countermeasures:

1、 Component damage or jamming

Gear component malfunction

Damage to disc gears/spline hole gears: Long term use or overload may cause gear breakage, missing teeth, or jamming, resulting in transmission failure.

Ratchet/pawl wear: Deformation of the ratchet groove or failure of the pawl spring can cause slipping or self-locking failure, and the handle cannot operate normally.

Response measures: Immediately stop using and replace damaged gears or ratchet components; Regularly check the lubrication of gears to avoid dry operation.

Chain issue

Excessive wear/breakage: When the diameter of the chain link wears down to 10% or cracks appear, it needs to be replaced as a whole, otherwise it may break and cause accidents.

Twisting or jamming: Uneven force, deformation or winding of the chain can lead to increased operating force or even jamming.

Response measures: Clean up foreign objects in the chain (such as mud, rust), correct deformation; If the wear exceeds the limit, a new chain must be replaced.

2、 Brake system failure

Brake pad wear: Insufficient friction between the brake pad and the ratchet wheel can cause heavy objects to only be pulled up and unable to descend, or brake failure.

Loose spring: Failure of the pawl spring may cause the brake to fail to lock, increasing the risk of heavy objects slipping off.

Response measures: Adjust the brake screws, replace worn brake pads or springs; Regularly test the braking performance to ensure that the hook can stop at any height.

3、 Operational violations or environmental impacts

Overloading use: Exceeding the rated load can cause the handle to be unable to be pulled, the chain to break, or the equipment to overturn.

Diagonal pulling/winding: Incorrect chain direction or winding can cause jamming or even damage to the gears.

Poor environment: Damp, corrosive environment or high temperature baking can accelerate component corrosion and reduce equipment life.

Response measures: Strictly use according to the rated load and avoid diagonal pulling; Clean the internal dust after outdoor work and store in a dry environment.

4、 Loose connecting components

Loose bracket/hook: Long term use may cause bolt breakage or loose connections, leading to equipment shaking or heavy object falling.

Response measures: Check all bolt connections monthly and tighten them in a timely manner; If cracks or deformations are found, replace the components immediately.

5、 Emergency response to sudden malfunctions

Immediate shutdown: When stuck or making abnormal noises, stop the operation to avoid further damage caused by forced pulling.

Investigate the cause:

Clean up any foreign objects in the gaps of the chain and try to restore the operation of the zipper with a light touch.

Check the braking device and fine tune the screws to observe if they are released from jamming.

Professional maintenance: If the gear is missing teeth, broken teeth, or the internal structure is damaged, it is necessary to contact professional personnel for disassembly and repair. Do not disassemble it yourself.

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