Rexroth hydraulic pump A4VG125HD32

Hydraulic pump fault reason: internal assembly error of oil pump causes internal leakage; elimination method: unloading plate and sealing ring must be installed into the oil cavity, two bushings to maintain balance.

The guide steel wire elasticity should be at the same time the upper and lower sleeve towards the driven gear rotating reversing the direction of a small angle, the drive gear and the driven gear two sleeve machining plane tightly; unloading groove sleeve must be installed low-pressure chamber side, to eliminate the gear meshing harmful dead volume.

Press selftightening oil seal, the surface should be coated with a layer of oil, but also pay attention to the oil blocking edge toward the front cover, not anti loaded; pump cover, to pour a small amount of hydraulic oil into the pump shell, and hand rotating gear fault causes meshing: "L" loaded "right hand" pump, cause washed out elimination: seal; "right-handed" pump can not install the "left" machine, otherwise they will be washed out seal.