10 Common Faults Of Reducer
Apr 30, 2023
10 Common Faults of Reducer
Crane reducers are widely used in docks, construction industries, steel plants, and other construction industries that need to lift heavy objects.
According to the different lifting standards, it is generally divided into four categories: super large, large, medium and small.
1) Super large hoisting reducer
Mainly used in the construction industry, wharf and steel industry, generally its bearing load is above 150T
2) Large hoisting reducer
Mainly used in the steel industry, construction machinery, etc., the general load is between 50-150T
3) Medium-sized hoisting reducer
It is mainly used in factory buildings and small construction machinery, with a load between 5-50T
4) Small hoisting reducer
It is mainly used in small factory buildings, and the load is below 5T, commonly known as electric hoist.
Common Faults of Reducer
|
Fault content |
Possible Causes |
The method of reducing the speed reducer |
|
Under no load condition, the motor does not rotate |
power failure |
Check the power supply, ask the power company |
|
Broken cable |
Check wiring |
|
|
Poor contact of the switch |
repair or replace |
|
|
Broken motor coil |
Send professional factory repair |
|
|
Three-phase motor connected to single-phase voltage |
Confirm the voltage and wiring mode |
|
|
Single-phase motor without capacitor |
connect capacitor |
|
|
Poor operation of single-phase motor starter |
Send professional factory repair |
|
|
Gears, shafts and bearings are damaged |
Send professional factory repair |
|
|
Under load, the motor does not rotate |
low voltage |
Check if the power cord is too long or too thin |
|
gear damage |
Send professional factory repair |
|
|
Overload rotation |
reduce load |
|
|
abnormal fever |
Overload rotation |
reduce load |
|
Too many starts and stops |
Reduce frequency of use |
|
|
bearing wear |
repair or replace |
|
|
Voltage too high or too low |
Check if the voltage is normal |
|
|
too much noise |
Loud and constant sound: damaged bearings, worn gears |
Send it to a professional factory for repair and contact the user service organization |
|
Occasionally loud sound: gear damage, foreign objects stuck |
||
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too much vibration |
Gear and bearing wear |
Send professional factory repair |
|
Poor fixation, loose screws |
re-tighten |
|
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Unusual erratic running noise |
Contaminated oil or insufficient oil |
Check oil color, consistency, oil level |
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Oil leakage: - at the motor flange, - at the motor oil seal, - at the reducer flange, - at the oil seal of the output section |
Screw loose |
re-tighten |
|
Damaged seal |
Instead, contact customer service |
|
|
Oil leakage at the vent plug |
too much oil |
Calibration oil quantity |
|
Breather plug installed incorrectly |
Correctly install the breather plug |
|
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Frequent cold starts (oil foaming) or oil level too high |
Swap the breather plug for an exhaust valve |
|
|
The output shaft does not rotate when the motor rotates |
The shaft key connection of the reducer is damaged |
Send professional factory repair |
