Four hydraulic pumps are out of order

One, hydraulic pump noise

Reason 1: suction pipe by extrusion or hydraulic oil suction filter block.

Disposal: clearing or changing hydraulic oil suction filter element.

Reason 2: suction tubing joint loose, thus causing the hydraulic pump to inhale a lot of air.

Diposal: retighten pipe joints.

Reason 3: hydraulic oil stuck through large, air cavitation noise.

Disposal: change to hydraulic oil with suitable viscosity.

Reason 4: hydraulic pump itself wear caused by abnormal noise.

Disposal: check and repair hydraulic pump.

Fault two, hydraulic pump displacement shortage, digging machine speed is slow

Reason 1: the engine speed can not reach the request and will cause the lack of hydraulic pump displacement.

Disposal: check and adjust engine speed.

Reason 2: hydraulic oil sticky through low, hydraulic oil temperature through high, oil level too low will cause the lack of hydraulic pump displacement.

Disposal: change the hydraulic oil of high quality or suitable viscosity to replace the hydraulic oil in short supply.

Reason 3: hydraulic pump conditioning bolts loose.

Disposal: recalibrate hydraulic pump displacement and lock the adjusting bolt.

Reason 4: in addition to hydraulic pump, distribution valve, oil cylinder, motor and other pressure relief too large will also lead to the lack of displacement, slow speed.

Disposal: check, repair and clean the defective parts.

Reason 5: hydraulic pump swash plate stuck, conditioning wear.

Disposal: repair or replace damaged parts.

Fault three, excavator pressure can not rise, excavator no force

Reason 1: the setting pressure of the main overflow valve is too low.

Disposal: readjust the pressure of the main overflow valve or change the main overflow valve.

Reason 2: in addition to hydraulic pump, distribution valve, oil cylinder, motor and other pressure relief too big will also lead to the lack of pressure, no power digging machine.

Disposal: check, repair and clean the defective parts.

Reason 3: hydraulic pump plunger, cylinder block, distribution plate and other wear and tear caused by the hydraulic pump leakage is too large.

Disposal: repair or replace worn parts of hydraulic pump.

4. Abnormal heating of hydraulic pump

Reason 1: hydraulic pump leakage caused by excessive heat.

Disposal: repair or change hydraulic pump.

Cause 2: hydraulic pump bearing wear or damage caused by heat.

Disposal: repair or replace worn parts of hydraulic pump.

Mr. Yang of wulong excavator repair factory summarized the faults of hydraulic pump of excavator:

In a nutshell, hydraulic pump present problems, the whole state of the excavation of the machine will sell at a discount greatly, and the cause of the different causes of trouble phenomenon also has the very big difference, so we must carefully control the faults in the above phenomenon, such ability accurate rapid disposal good question. Car radiator excavators tank oil radiator radiator construction machinery