Reasons for low pressure of hydraulic press.

About small hydraulic press,if you can rule out other external causes, it is likely to leak.

1. The pump is severely worn and has large internal leakage.
2. The overflow valve is malfunctioning and is in a normally open state.
3. The internal leakage of the directional valve is large.
4. The internal leakage of the executive original is large, indicating that the pump pressure is small.

Solutions of hydraulic press pressure can not be increased

1. The hydraulic press takes measures to reduce the temperature of the system
2. Replace or repair used hydraulic pump
3. Second-hand hydraulic press disassembly, cleaning overflow valve
4. Repair and replace the overflow main spool and valve body
5. Disassemble and clean the overflow valve, replace or repair the pilot needle valve and valve seat.
6. Dismantling and repairing the missing poppet valve or the poppet valve is not installed in the valve seat hole. For this, check the assembly or tightness of the poppet valve.
7. Second-hand hydraulic press replacement or repair pressure regulating handwheel
8. Replace or reinstall the pressure regulating spring
9. Replace or repair the valve seat and pilot needle valve. This article is reproduced from the laser cutting machine

Solutions to Common Pressure Faults of Hydraulic Press

1. Excessive impurities in the power source of the hydraulic press, especially contaminants that are easy to entangle, can easily entangle the blades of the hydraulic motor, and the speed of the hydraulic motor will be uneven, which will hinder the flow of hydraulic oil and cause uneven pressure. For such failures, it is recommended to replace the hydraulic oil filter device and then replace the hydraulic oil.
2. The hydraulic pump is faulty. This is also the part where the hydraulic machine is more prone to failure. There are probably three reasons:

1) The seal ring is damaged and air flows in, causing uneven pressure;

2) There are no paper pads on both sides of the pump body and the pump cover; the pump body and the pump cover are not sealed vertically: this requires air to be sucked in when rotating: paper pads are added between the pump body and the pump cover; the pump body is ground on a flat plate with emery, So that the vertical error of the pump body and the pump cover does not exceed 0.005mm, tighten the connection of the pump body and the pump cover, and there should be no leakage.

3) Damage to the hydraulic pump itself, insufficient gear engagement, resulting in insufficient oil supply and uneven pressure. 3. The failure of the oil suction pump is also due to insufficient oil suction, resulting in uneven pressure.