How To Solve The 7 Common Faults Of Cranes?

Fault Name

Cause of Issue

Method of Exclusion

The bridge frame of the crane truck runs skewed

1. The diameter error of the two driving wheels is too large.

1. Measure and replace the wheel.

2. The active wheels are not all in contact with the track.

2. Drive the full-load trolley to the end behind the cart. If the cart runs straight, it means that the driving wheel at this end is not fully in contact with the track, and the wheel pressure is small. You can increase the diameter of the driving wheel at this end.

3. The axis of the driving wheel is not correct.

3. Check and eliminate the phenomenon of axis deviation.

4. Deformation of the metal structure.

4. Correction.

5. The track installation quality is poor.

5. Adjust the shaft track to make the track meet the standard.

6. There is oil on the top of the rail.

6. Eliminate oil stains.

Crane trolley skidding

1. The track is oily, etc.

1. Eliminate.

2. Wheel pressure is different.

2. Adjust the wheel pressure.

3. The elevation difference between the two tracks in the same section is too large.

3. Adjust the track.

The trolley runs on three legs

1. The wheel diameter deviation is too large.

1. Process the wheels as required.

2. The installation is unreasonable.

2. Readjust the installation according to the technical conditions.

3. The small frame is deformed.

3. Frame correction.

Wire ropes wear out quickly or are often damaged

1. The diameter of pulley and reel is too small.

1. Replace the wire rope with better flexibility or increase the diameter of the pulley or drum.

2. The size of the rope groove on the drum does not match the diameter of the rope, it is too small.

2. Replace the steel wire rope with the same lifting capacity but smaller diameter, or replace the pulley and drum.

3. Dirt and lack of lubrication.

3. Clean and lubricate.

4. The lifting limit baffle is not installed correctly, and the rope is often worn.

4. Reinstall.

5. The bottom of the pulley groove or the rim is not smooth and has defects.

5. Eliminate defects.

The reducer has uneven knocking sound when the gears mesh, and the casing vibrates

The tooth surface is defective, and the teeth do not contact along the entire tooth surface, but at one corner.

Change the gear.

The reducer housing, especially where the bearing is installed is hot

1. The bearing is broken.

1. Replace the bearing.

2. The journal is stuck.

2. Replace the bearing.

3. Tooth wear.

3. Trim the gear.

4. Lack of lubricating oil.

4. Replace lubricating oil.

Brakes are hot, friction pads smell burnt and wear out quickly

1. After the brake shoe is released, it is not completely disengaged from the brake wheel evenly, resulting in friction.

1. Adjust the gap.

2. The gap between the two brake shoes and the brake wheel is uneven, or the gap is too small.

2. Adjust the gap.

3. The auxiliary spring of the short stroke brake is damaged or bent.

3. Replace or repair the auxiliary spring.

4. The working surface of the brake wheel is rough.

4. Process the surface of the brake wheel according to the requirements.

The brake does not hold the brake wheel

1. The hinge of the lever is stuck.

1. Lubricate and eliminate stuck faults.

2. There is oil stain on the brake wheel and friction plate.

2. Clean oil stains.

3. The electromagnet core does not have enough stroke.

3. Adjust the brake.

4. The brake wheel or friction plate is severely worn.

4. Replace the friction plate.

5. The main spring is loose and damaged.

5. Replace the main spring and lock nut.

6. The lock nut is loose and the tie rod is loose.

6. Tighten the lock nut.

7. Overhaul the impeller driving mechanism.