Common failure analysis of hydraulic pump A7VO28 Rexroth hydraulic pump

Second-hand Rexroth A7VO28 hydraulic pump hydraulic pump spot sales:

Cause of failure: too low oil level of hydraulic tank;

Exclusive method: add hydraulic oil

Cause of failure: not using hydraulic oil in season;

Method of elimination: 46# hydraulic oil (or 68#) is usually not needed to be replaced, and 32# is used in winter when the north is very cold

Fault reason: the inlet pipe is seriously blocked by dirt;

Exclusive method: take out foreign body in the tube

Fault reason: oil pump gear oil seal damage, air into the hydraulic system;

Troubleshooting: replace aging or damaged oil seal, O - shaped seal ring

Fault reason: oil pump inlet and outlet joint or bend joint "O" seal ring damage, bending joint fastening bolt or inlet and outlet pipe nut is not tightened, air into the hydraulic system;

Elimination method: replace the O shape sealing ring, tighten the bolt or nut at the joint.