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What about the abnormal output pressure of Parker hydraulic pump?
2020-04-13 09:07 source: PARKER pike Publisher: Shanghai is crowned.
Our common Pike hydraulic pump The output pressure is determined by load and approximately proportional to the input torque. There are two kinds of malfunctions in abnormal output pressure.

(1) low output pressure.
When the pump is self priming, if the oil inlet pipe leaks or the hydraulic cylinder, one-way valve and reversing valve in the system are leaked, the pressure will not rise. It is necessary to find out the leak location, tighten and replace the seals, so that the pressure can be increased. The relief valve is faulty or the adjustment pressure is low, and the system pressure is not up. It is necessary to readjust the pressure or overhaul the relief valve. If the cylinder block of the hydraulic pump is deviate from the distributor plate, resulting in a great deal of leakage, when the cylinder block may be cracked, the mating surface or the replacement of the hydraulic pump should be redone.

(2) high output pressure.
If the loop load continues to rise, the pump pressure will continue to rise, which is normal. If the load is constant and the pressure of the pump exceeds the pressure required by the load, the hydraulic components other than the pump should be checked, such as directional valve, pressure valve, transmission device and return oil pipeline. If the pressure is too high, the relief valve should be adjusted.
 Pike hydraulic pump
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