A6V107HD1DFZ20850 Hoisting motor 803000137

The output flow rate of the hydraulic pump is insufficient or the suction amount of the oil (1) which is not output is insufficient.  The reason is that the resistance on the oil suction pipe is too high or the oil supply is insufficient.  For example, the rotating speed of the pump is too high, the liquid level in the oil tank is too low, the oil inlet pipe leaks, the oil filter is blocked, etc.  (2) Excessive leakage.  The reason is that the clearance of the pump is too large and the seal is not good.  If the oil distribution plate is scratched by metal fragments, iron filings, etc., the end face leaks oil;  The sealing surface of the one-way valve in the variable mechanism is not well matched, and the supporting surface of the pump body and the oil distribution plate has sand holes or grinding marks, etc.  The damaged part of the pump can be identified by checking the foreign matter mixed in the hydraulic oil in the pump body.  (3) The inclination angle of the inclined disc is too small and the displacement of the pump is small, which requires adjusting the variable piston to increase the inclination angle of the swash plate.