Firstly, hydraulic system malfunction

1. Failure of the oil pump in the hydraulic system: causing the machine to fail to start normally or insufficient pressure during bending.

2. Poor or stuck hydraulic cylinder seal: causing mechanical malfunction or obstruction of up and down movement.

Solution:

1. Replace with a new oil pump or repair the original oil pump.

2. Replace the hydraulic cylinder with a new one or reinstall the parts that cause jamming.

Secondly, electrical system malfunction

1. Switch and relay malfunction: causing the machine to fail to start normally or quickly short circuiting, resulting in the motor stopping rotating.

2. Electric leakage in the control box: causing the equipment to malfunction.

Solution:

1. Replace damaged switches or relays.

2. Replace the electronic control box with a new one or search for a leaking power source and repair it.

Thirdly, mechanical structure failure

1. Twisted, stretched, or worn activity guide rod: causing the guide rod to be uncoordinated with mechanical movement.

2. Loose or worn mechanical parts: leading to mechanical malfunction or unstable up and down movement.

Solution:

1. Replace the guide rod with a new one or repair it.

2. Tighten the mechanical parts again or replace the damaged parts.

In summary, there are many reasons why hydraulic bending machines do not move up and down, but they are usually caused by problems in the hydraulic system, electrical system, mechanical structure, and other aspects. The corresponding solution is also relatively simple. When using a hydraulic bending machine, it is necessary to regularly inspect all parts of the equipment, promptly detect faults and handle them to avoid affecting the service life and work efficiency of the equipment.