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Causes of insufficient or no pressure in the hydraulic system of the lifting platform

by:Staxx Pallet Truck     2021-09-20
1. All hydraulic pumps can output hydraulic oil. If there is no hydraulic oil output, the steering of the lithium pallet truck platform pump may be incorrect. The motor phase should be adjusted. If there is hydraulic oil output, the oil return pipes should be checked. It may be that the set pressure is low. Tighten the pressure regulating spring of the overflow valve. If there is no change in pressure, it may be that the main spool of the relief valve or the pilot part of the vertebral valve is stuck in the opening position due to dirt or rust, or the spring is broken, or the orifice is blocked by dirt and the pump output The hydraulic oil immediately flows to the oil tank through the overflow valve. The troubleshooting method: disassemble the overflow valve, clean it, check or replace the spring, and restore its working performance. 2. The pressure oil leaks from the high-pressure chamber to the low-pressure chamber. It may be because the safety valve is not closed tightly, or it may be because the piston rod or the sealing ring at the piston is damaged. 3. Insufficient oil suction of the hydraulic pump. The oil filter is blocked, and the oil filter should be cleaned or replaced. 4. The hydraulic pump heats up and the oil temperature is too high. If the hydraulic pump is damaged, a new hydraulic pump should be replaced. If the oil viscosity is too high, an appropriate viscosity should be selected. If the cooling is insufficient, the cooling system should be improved. 5. The speed of the hydraulic pump is too low and the belt slips, and the coupling and prime mover should be eliminated. 6. If the output flow of the hydraulic elevator pump decreases significantly with the increase of pressure, and the pressure does not reach the specified value, it is because the pump is damaged After the gap increases, it should be repaired or replaced. 7. If the entire system can establish normal pressure, and there is no pressure in some pipelines, hydraulic cylinders, and motors, it may be that the small holes in the pipe, the throttle valve, the reversing valve and other parts are blocked. Check the pressure and whether there is oil one by one. Liquid was eliminated by finding the cause. Recommended reading: How to deal with the excessively long lithium pallet truck platform
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