Rexroth PGF series PGF1 PGF2 PGF3 PGF2-2X/ 006/008/011/013 hydraulic gear pump PGF2-2X/006RA01VP2

PGH series gear pump

The oil in the lift cylinder is directly connected to the one-way valve lowering valve. When the lowering valve is poorly sealed, the oil in the cylinder will be directly discharged into the tank causing automatic sedimentation; However, when the one-way valve is poorly sealed and the lowering valve is well sealed, the oil in the cylinder cannot be discharged through the lowering valve. According to the operating principle of the oil circuit during lowering, after parking, the oil in the cylinder will flow back into the high-pressure oil circuit of the gear pump through the one-way valve. At this time, if the gear pump is worn after being used for a period of time, a poor sealing condition occurs, This will cause the oil in the lift cylinder to flow back to the oil tank through the one-way valve gear pump high-pressure oil pipe gear pump suction pipe, causing automatic sedimentation; If the gear pump is in good condition and has excellent sealing performance at this time, it will not cause the oil in the lift cylinder to flow back through the gear pump and cause automatic sedimentation, which is the reason why the automatic sedimentation of the lift disappears after replacing the gear pump mentioned in the case