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1. There are several main points to pay attention to when maintaining the pump.
A. Rolling bearings: When the oil pump runs for a long time and the bearings wear to a certain degree, they must be replaced.
B. Front seal ring, rear seal ring: When the seal ring is worn to a certain extent, it must be replaced.
C. Mechanical seals: Mechanical seals should not be opened for inspection in the absence of oil leakage. If there is a serious leakage at the leakage port at the lower end of the bearing body, the mechanical seal should be dismantled. When assembling and disassembling mechanical seals, care must be taken to ensure that the mating surfaces are clean and the mirrors of the stationary ring and the moving ring are protected. It is forbidden to knock. The reason for the leakage due to the mechanical seal is mainly due to the fact that the friction mirror surface is pulled. The repair method can grind the frictional end face to restore the mirror surface. Another cause of leakage from the mechanical seal is the improper installation of the o-shaped rubber seal (or cushion) or the deterioration of the deformation. In this case, adjust or replace the "O" ring for reassembly.
2. Oil pump disassembly sequence:
A. Remove the motor or remove the coupling.
B. Remove the bearing body assembly, check the radial clearance between the impeller and the front mouth ring and check for looseness of the impeller nut.
C. Remove the impeller nut, pull out the impeller and check the radial clearance between the impeller and the rear seal ring.
D. Loosen the set screw of the mechanical seal, pull out the moving ring part of the mechanical seal, check the fit of the end face of the moving and stationary ring, and check the sealing of the “o†shaped seal ring (or cushion).
E. Pull out the coupling nut's tightening nut and pull out the coupling.
F. Remove the bearing cap and remove the pump shaft and bearing.
G. The assembly can be performed in reverse order at the time of installation.
The pump is characterized by its simple and reliable structure and durability. Under normal pump conditions, it is not usually necessary to dismantle the maintenance frequently. When you find a fault, you can always give it to you.