Overhead cranes, also commonly referred to as cranes, are indispensable lifting equipment in factories, workshops, and diverse industrial sectors. However, over time, these cranes can encounter various malfunctions that not everyone knows, potentially disrupting production schedules. In today’s article, join VINALIFT as we delve into common overhead crane faults, their root causes, and practical solutions!
6 Common overhead crane faults
| Problem | Causes | Solutions |
| 1, Crane does not follow the directions of the pedant | The phase sequence of the power source is not correct | Change the sequence of the power source from the general switch. |
| 2, When hoisting, the brake is stripped | – The gap of the brake line is large – Brake line is worn | – Adjust the gap of the brake line – Exchange a new brake line |
| 3, There is no movement even when pressing all the buttons | – Electricity is interrupted – The general switch is broken – The transformer is broken – Pedan is broken | – Close the circuit breaker and check if there is sufficient three-phase voltage. – Inspect the fuses and circuit breakers. – Replace the transformer – The emergency stop button is faulty; repair the contacts. |
| 4, The motor moves along the beam, the house does not work | – The travel limit switch on the long girder is faulty – Interlock contacts in the pushbutton panel are not making contact. The control cable is broken. – The inverter is faulty. | – Verify the functionality of the encoder (resolver for the inverter) – Inspect the motors and brakes. – Inspect the circuitry and make necessary reconnections. – Test and replace the inverter if necessary. |
| 5, The engine moves along the beam, the house does not run, and there is the roar of the engine | – The brakes are not releasing. – Motor has lost a phase. | – Inspect the brake coil, rectifier diodes, and brake contactor. – Check the phase sequence of the entire system. |
| 6, The hook moves up even though opening the hook has pushed the travel limit lever | – The upper travel limit switch is faulty. – Phase sequence is incorrect. – The control circuit is wired incorrectly. | – Repair or replace the travel limit switch. – Correct the phase sequence of the power supply to the hoist motor. – Verify synchronization between the control circuit, motor rotation, travel limit switches, and push buttons. |
* Please note: The above list only includes common faults that overhead cranes often encounter. During the operation and use of the equipment, your equipment may not only encounter these faults but may also experience more complex ones. In that case, you need to contact professional units in the field of overhead crane repair and maintenance to ensure the best possible progress of your work.
Established in 2006, VINALIFT has nearly two decades of experience and expertise in the lifting and handling industry. With this extensive background, VINALIFT is committed to providing customers with the highest quality products and services at competitive prices.
READ MORE: Safe and Efficient Crane Operation Procedure
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