Solution to the problem of stainless steel lever hoist chain not working

1、 Common causes and solutions of malfunctions

1. Chain stuck or damaged

Foreign object jamming

Phenomenon: The chain is stuck due to dust, debris, or foreign objects.

resolvent:

Clean the chain and sprocket to ensure there are no debris.

Check if the chain channel is unobstructed, and if necessary, disassemble and clean it.

Chain deformation or breakage

Phenomenon: The chain is twisted, stretched, or broken.

resolvent:

Replace severely deformed or broken chains, and prohibit mixing old and new chains.

Regularly check the wear of the chain, use specialized tools to measure the size of the chain links, and replace them if they exceed the standard.

Chain wheel wear

Phenomenon: The wear of the sprocket tooth surface leads to poor chain meshing.

resolvent:

Replace the severely worn sprocket and replace it with a new chain to ensure proper engagement.

Regularly check the deviation of the sprocket center distance (≤ 2mm) and adjust it to meet the standard.

2. Mechanical component failure

Gear or bearing wear

Phenomenon: Gear wear, bearing jamming or damage.

resolvent:

Disassemble and inspect gears and bearings, replace worn parts.

Lubricate gears and bearings to ensure smooth operation.

Brake system failure

Phenomenon: Brake pad wear and spring failure result in the inability to secure the chain.

resolvent:

Check the thickness of the brake pads (should be greater than 2mm), and replace them if they wear down to below 2mm.

Adjust the pressure of the brake spring to ensure that the rotation angle of the brake wheel is less than 15 °.

Clean the surface of the brake and apply molybdenum disulfide grease.

3. Insufficient lubrication

Phenomenon: The chain is dry and corroded, and the friction of mechanical components increases.

resolvent:

Regularly lubricate the chain with specialized lubricating oil to ensure that the lubricating oil enters the gap between the rollers and the inner sleeve.

Avoid using strong acid, strong alkaline cleaning agents or organic solvents to prevent chemical corrosion.

4. Improper operation or overloading

Overloaded use

Phenomenon: Exceeding the rated load can cause chain breakage or mechanical damage.

resolvent:

Confirm that the load weight is within the rated range of the equipment.

Avoid long-term overload operation.

Operation error

Phenomenon: Operations such as pulling diagonally or forcefully can cause damage to the chain or mechanical structure.

resolvent:

Follow the operating procedures in the manual and prohibit rough handling.

Ensure the balance of the lifted object and avoid tilting or sliding.

5. Environmental factors

Corrosive environment

Phenomenon: The chain rusts due to damp or corrosive environments.

resolvent:

Keep the equipment dry, regularly clean and apply rust inhibitor.

Use coated chains or stainless steel specialized chains in harsh environments.

2、 Standard maintenance process

1. Daily inspection

Pre operation inspection:

Check the chain, sprocket, brake system, and lubrication condition.

Confirm that the chain tightness is appropriate (2% -3% of the center distance between the two sprockets).

Send a startup warning signal to ensure no one is around.

2. Regular maintenance

Weekly maintenance:

Clean the chain and sprocket to remove dust and debris.

Check the thickness of brake pads and spring pressure.

Quarterly maintenance:

Conduct a special inspection of the brake system, clean the brake and measure the wear.

Check the lubrication of gears and bearings, and replenish lubricating oil.

Annual maintenance:

Thoroughly inspect the equipment and replace worn parts by professional personnel.

Verify the functions of overload protectors and limit switches.

3. Lubrication requirements

Lubrication cycle: Clean and lubricate the chain after each use, and lubricate the equipment daily for high-frequency use.

Lubricant selection: Use specialized chain lubricant and avoid using inferior or corrosive lubricants.

Lubrication method:

After cleaning the chain, spray lubricating oil directly onto the gap between the chain links.

Avoid excessive lubrication and prevent dust adsorption.

3、 Safety operation standards

1. Operation qualification

Operators must undergo training and obtain a special equipment operation certificate, and unlicensed operations are prohibited.

2. Safety inspection

Confirmation before operation:

The equipment has no fault alarm and the braking system is normal.

The lifted object is securely tied and there is no risk of sliding.

Prohibited during operation:

Overloading, diagonal pulling, and adjusting the brake under load.

When lifting, pass above personnel or allow personnel to stay under the crane arm.

3. Emergency measures

Chain breakage or loss of control: Immediately press the emergency stop button to secure the load and prevent it from falling.

Personnel injured: Cut off the power, provide first aid, and contact medical personnel.

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