Failure Prevention of Manual Hydraulic Pump
The use of the manual hydraulic pump for a long time will lead to the failure and aging of obstacles. This article introduces how to deal with these failures in daily use.
If the use time is too long, it is necessary to check the internal leakage of the boom cylinder. The simple method is to raise the boom to see if it has obvious natural fall, or if the fall is obvious, dismantle the cylinder for inspection. If the seal ring is worn, it should be replaced immediately.
The aged or damaged framework oil seal and O-ring seal shall be replaced for the manual hydraulic pump, and the worn gear or oil pump shaft sleeve shall be replaced. When the wear is slight, the end face shall be ground flat on the flat plate, and the unevenness may have some deviation. If the unevenness is out of tolerance, copper sheet shall be added for supplement. The manual hydraulic pump shall be installed on the rear shaft sleeve during installation.
The hydraulic pump must be worn. When the pump is running at a low speed, the leakage is important. When the pump is running at a high speed, the pressure of the pump rises slightly. However, due to the wear and internal leakage of the pump, the volumetric efficiency decreases significantly, so it is difficult to reach the rated pressure. The long-term operation of the hydraulic pump aggravates the wear and the oil temperature rises, resulting in the wear of the hydraulic components, the aging and damage of the seals, the loss of the sealing effect, the deterioration of the hydraulic oil, and the failure.
In addition, the manual hydraulic pump also needs to increase or change the qualified oil according to the season until the specified oil level. Clean up the foreign matters in the oil outlet pipe, tighten the bolts or nuts at the joint, at the same time, the unloading groove on the shaft sleeve must be installed on the side of the low-pressure chamber, the unloading plate and the sealing ring must be installed in the oil inlet chamber, and the two shaft sleeves must maintain the balanced shape.
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