Summary of common faults of stainless steel lever hoist

The common faults, causes, and solutions that may occur during the use of stainless steel lever hoists (also known as chain hoists or lever type lifting hoists) are as follows:

1. Slip phenomenon

Reason for malfunction: Excessive wear of internal friction plates, resulting in ineffective power transmission during braking.

Solution: Contact maintenance personnel to replace the friction plate with a new one.

2. Damaged parts

Reason for malfunction: Improper operation or collision may cause damage to components such as hooks, chains, covers, and pressure chain shafts.

Solution: Replace the corresponding parts in a timely manner according to the damage situation, and avoid using damaged components.

3. Brake system issues

Reason for malfunction:

Excessive brake clearance leads to brake failure.

The wear of the brake ring has reached its limit and cannot provide sufficient braking force.

Solution:

Adjust the brake clearance to the standard range.

Replace the worn brake ring.

4. Chain malfunction

Reason for malfunction:

Chain breakage: Material fatigue caused by overloading or long-term use.

Chain wear or deformation: Excessive friction with pulleys or drums.

Solution:

Immediately replace broken or severely worn chains.

Regularly check the status of the chain to avoid overloading.

5. Motor abnormality (electric hoist)

Reason for malfunction:

The power supply is not connected or the voltage is too low.

Motor phase loss operation (three-phase motor).

Bearing damage or incomplete disengagement of brake.

Solution:

Check the power circuit to ensure stable voltage.

Repair or replace damaged electrical components (such as contactors, fuses).

Adjust the brake clearance to ensure complete disengagement.

6. Abnormal noise

Reason for malfunction:

Poor contact of contactor contacts or stuck magnetic core.

Motor bearings are damaged or the axis of the coupling is not aligned.

The reducer lacks lubricating oil or the gears are worn.

Solution:

Repair or replace faulty contactors.

Replace the motor bearings and adjust the coupling.

Add lubricating oil and replace worn gears.

7. Operating mechanism issues

Reason for malfunction:

Wheel slippage: Oil stains on the track or wheel tread.

Wheel asynchrony: Large differences in wheel diameter or inconsistent brake clearance.

Track jamming or deviation: Poor track installation accuracy or uneven wheel wear.

Solution:

Remove oil stains from the track and sprinkle sand if necessary to increase friction.

Replace the wheels with large diameter differences and adjust the brake clearance.

Correct the track span and elevation difference, and adjust the clearance between the wheels and the track.

8. Corrosion issues

Reason for malfunction: Prolonged exposure to damp or corrosive environments may cause rusting on the surface of stainless steel.

Solution:

Regularly clean and apply rust inhibitor.

Avoid using in highly corrosive environments or choose stainless steel materials with higher corrosion resistance levels.

9. Other common questions

The device is stuck:

Reason: Heavy load or brake failure.

Solution: Unload the load, check and repair the brake.

The descent speed is too fast:

Reason: Brake failure or hydraulic system malfunction (electric hoist).

Solution: Adjust the brake or repair the hydraulic system.

Cable damage:

Reason: Cable aging or mechanical damage.

Solution: Replace the cable with one that meets the specifications and standardize the wiring.

preventive measure

Regular maintenance: Check key components such as chains, brakes, and motors, and replace worn parts in a timely manner.

Standardized operation: Avoid overloading and prohibit rough operation (such as pulling the chain forcefully).

Environmental control: Keep the work area dry and avoid contact of corrosive substances with equipment.

Training personnel: Ensure that operators are familiar with equipment performance and comply with safety operating procedures.

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