To do a good job in the maintenance of European wire rope electric hoists, it is necessary to start from daily cleaning, lubrication, regular inspections, special maintenance of wire ropes, electrical system maintenance, and safety operation standards. The specific measures are as follows:

1、 Daily cleaning and lubrication

Cleaning requirements

Regularly use a clean cloth or brush to remove dust and dirt from the surface of the electric hoist, and avoid using corrosive cleaning agents.

During cleaning, it is necessary to prevent water from seeping into the interior. After cleaning, wipe the surface dry to prevent rusting.

Lubrication points

Use specialized lubricating oil or grease for key parts such as gears and bearings to reduce wear.

Wipe off excess oil stains after lubrication to avoid polluting the environment or affecting operation.

Steel wire ropes need to be regularly coated with lubricating oil to prevent rust and reduce internal friction, thereby extending their service life.

2、 Regular inspection and component maintenance

Special inspection of steel wire rope

Daily inspection: Check the steel wire rope daily for any breakage, deformation, corrosion, or tangled wires. If any defects are found, stop using and replace immediately.

Regular inspection: Conduct a comprehensive strength test every 6 months to check for wear and breakage of wires.

Scrap standard:

The diameter has decreased by more than 40% compared to the original diameter.

Whole strand breakage or core extrusion.

There are 7-8 broken wires within one pitch.

Severe deformation after exposure to chemical media or overloading.

Brake system adjustment

Adjust the brake sliding amount to ensure the brake sliding amount under rated load

S≤V/100

（

V

Stable lifting distance for 1 minute under load.

Check the reliability of the brake to prevent it from slipping when heavy objects hover.

Inspection of transmission components

Check whether the gears and bearings are worn or loose, and replace damaged parts in a timely manner.

Ensure that the edge of the pulley is not cracked to prevent the steel wire rope from being cut off by diagonal dragging with the steel edge.

3、 Electrical system maintenance

Control box inspection

Regularly test the sensitivity of switches and buttons to ensure the normal operation of contactors and limiters.

Check if the power circuit is missing phase and if the voltage is stable (if the motor terminal voltage is lower than the rated value by more than 10%, it will cause lifting difficulties).

Insulation resistance test

Use a 500V megohmmeter to check the insulation resistance of the motor and control box. The cold resistance at room temperature should be greater than 5M Ω.

4、 Safety operation standards

Load management

Overloading is strictly prohibited. Before lifting, confirm that the load is within the rated range.

Avoid sudden stops or changes in direction to prevent overload impact.

Operation taboos

It is prohibited to press two buttons in opposite directions simultaneously.

It is prohibited to operate buttons, or to pull or hang diagonally while the load is suspended.

It is prohibited to use electric hoists as elevators for carrying passengers.

Environmental Requirements

Avoid using in high temperature, humid, and corrosive gas environments.

Set up warning signs in the operation area, remove debris, and ensure safety.

5、 Long term disuse and storage

rust prevention treatment

When not in use for a long time, clean the steel wire rope and apply lubricating oil. Wrap it and store it in a dry place, with wooden boards or sleepers underneath.

Regularly check the storage status to prevent component deformation.

no-load test

Before reactivation, conduct no-load test run and static load test (rated load 125%, 100mm above the ground, lasting for 10 minutes).

Check if the mechanical transmission and electrical connections are normal.

6、 Professional maintenance and recording

Specialized personnel operation and training

Designate a dedicated person to operate, and the operator must master safety regulations and receive regular training.

Cut off the power before maintenance and perform it under no-load condition.

Maintenance Record

Detailed records of each inspection and maintenance, including component replacement, parameter adjustment, etc.

Archive the fault phenomena and handling methods for easy traceability and analysis.

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