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China hydraulic pump manufacturers, hydraulic pumps and motors, hydraulic pump parts, piston pump parts, hydraulic pump,  hydraulic spare parts, hydraulic piston pump, hydraulic vane pump, hydraulic gear pump, Hydraulic Motor,Pilot Pump, Charge Pump for Rexroth,Caterpillar,Vickers,Denison,Sauer,Kawasaki,Commercial,Linde,Parker,Liebherr,Komatsu,Eaton,Daikin,Kubota,Johndeer,Hitachi. T6C,T6D,T6E,45VQ,35VQ,25VQ,20VQ,V10,V20,Hydraulic Motor.

 

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Hydraulic Pump Common Faults and exclusion methodCause: (1) hydraulic oil tank is too low;????Remedy: Add hydraulic oil????Cause: (2) no use of hydraulic oil according to season;????Remedy: usually applied 46 # hydraulic oil (or 68 #), no need for special replacement, especially when cold northern winter, consider using 32 #????Cause: (3) into the pipeline was severely clogged dirt;????Remedy: Remove the foreign body tube????Cause: (4) oil pump drive gear oil seal is damaged, the air into the hydraulic system;????Remedy: replace aging or damaged oil seals, O-rings????Cause: (5) pumps, the oil port adapter or elbow connector "O" ring is damaged, bent or joint fastening bolts into or out of the flare nut is not tight, the air into the hydraulic system;????Remedy: Replace O-ring, tighten the bolt or nut joints????Cause: (6) Drain pumps, seals aging;????Remedy: replace the seals????Cause: (7) pump end or main sleeve end surface of the driven gear wear or scratch, the two sleeve end surface roughness tolerance;????Remedy: Replace worn gear pump or pump bushings, wear light when flat end mill will be smooth. When the end face of the sleeve is less than the pump, the plane (normal less than 2.5 ~ 2.6mm), such as ultra-poor should be added at 0.1 ~ 0.2mm copper sleeve to compensate for installation; its flatness tolerance 0.03mm It should be put on the rear axle load sets????Cause: (8) pumps internal parts assembly error caused by internal leakage;????Remedy: unloading pieces and sealing ring must be put into the oil chamber, two sleeves in order to maintain balance. The guide wire should be able to simultaneously stretch the upper and lower sleeve toward the direction of rotation of the driven gear to reverse a slight angle, so that the main driven gear machining plane two bushings tight fit; unloading tank must be installed in a low-pressure chamber on the sleeve side, resulting in the elimination of harmful gear when closing dead volume; the front pushed from the tight seal, its surface should be coated with a layer of oil, but also pay attention to the front edge toward the oil-barrier cover, can not hold against; pre-installed pump cover shall to pour a small amount of hydraulic oil pump housing and turned by hand gear????Cause: (9) "L" loaded "right-handed" pump, resulting in washed out skeleton Seal;????Remedy: "right-handed" pump can not be installed on the "L" machine, otherwise washed out skeleton Seal;????Cause: (10) hydraulic oil is too dirty.????Remedy: cleaning systems, replacement of hydraulic oil.????Cause: (11) pump filter is not blocked from the oil filter dirt effect????Remedy: clean with clean oil filter to remove dirt.????Cause: (12) oil shortage, oil position is too high, exposing the oil suction pipe:????Remedy: Come to the oil standard position, reduce the suction position.????Cause: (13) on both sides of the pump body and pump cover does not add paper pad; pump and pump cover is not perpendicular to the seal:????Remedy: When the rotation of the intake air: join between pump and pump cover paper pad; pump with a diamond abrasive on the plate, so that the pump body and pump cover vertical error of not more than 0.005mm, pump and pump cover fastening links , without leakage.????Cause: (14) pump drive shaft and motor coupling misalignment, with a twist of friction:????Remedy: Adjust the concentricity of the pump and motor coupling so that the error does not exceed 0.2mm.????Cause: (15) meshing precision gear pump is not enough:????Remedy: to grind gears reach gear accuracy.????Cause: (16) off the pump shaft seal skeleton, the body is not sealed:????exclude??High-pressure pump work function????????Increase the fuel pressure, high-pressure injection, to achieve the best atomization, high-pressure pump is the power source for critical uses as jacks, upsetting head, a Zhahua, extruders and other hydraulic devices.????????High-pressure pump installation sequence is as follows: During the installation of the high-pressure pump being, in order to avoid debris to fall into the machine, all units should cover the perforations. The unit on the basis of anchor bolts buried in between the base and the base, using a pair of wedge pad for correction. Correction shaft and motor shaft concentricity, on the road linking the outer shaft, the allowable deviation 0.1 mm; two coupling plane gap should ensure that 2 to 4 mm, (a small pump to take a small value) gap should be uniform, allowing difference 0.3 mm. After the connected piping and determine the motor direction of rotation, connect the coupling, and then check it again concentric aromatic shaft. After the actual test run the unit 2 to 3 hours, for a final check, if no adverse phenomenon, is considered qualified to install. In the commissioning process, check the bearing temperature and vibration are as follows: Loosen the coupling large, with a horizontal instrument were placed on the electric oil pump shaft and the base, by adjusting the wedge pad, correction unit level, tighten the bolt appropriate to Anti-around. In order to prevent pipeline debris into the pump, to the newly installed pipeline should be installed in the pump glue filter, the effective cross-section should be greater than 2 to 3 times the suction pipe section.