Applicable excavator PC35 PC40 PC45 rotary solenoid valve 172456-73580

Common excavator faults

    First： the engine water temperature is high, after removing the thermostat, the hole under the thermostat seat should be plugged with wood to prevent hot water recirculation.

   Second： gear pump separate side to produce a vacuum suction inlet. The extrusion side volume becomes smaller, producing pressure, which is the discharge outlet. The back of the 3 font valve plate always faces the discharge outlet. Under the pressure of the pressure oil, the valve plate produces the axial force of squeezing the gear and strengthens the seal. It also has the function of automatically compensating the compression force after wear.

   Third：the smallest core in the pilot handle mainly plays the role of micro-operation.

   Fourth： individual parts are often blocked, should check whether the road taken over by the internal peeling caused.

    Five： The middle of the spring of the distributor valve stem is thinner than that of the outer ring, which should play a stroke buffering role at the end of the action stroke, and the middle sleeve limits the stroke of the valve stem.

   Six：the general judgment of the iron filings: 1, the shiny is the oil cylinder, because of the low speed, there is no loss of luster. 2, Fau is produced by pump, or motor bearing, because of high-speed rotation, dull.

     Seven： the secondary pilot pressure is normal, but the action is slow, the car hammer, should consider whether there is dirt in the pilot handle to limit its stroke, so that the stroke is reduced (even if the maximum operation), although the pressure is enough, the flow is insufficient, the force acting on the valve stem is not enough, the valve stem opening is not enough, the relevant action will be slow.

A movement is slow or immobile. The relevant lead secondary pressure is less than 20KG.

     Eight: When replacing the handle oil seal, the small core on the lower side fell below, not in the hole of the valve stem, and replaced with a long and thick iron wire with little difference on the site.

      Nine： K3V main pump proportional solenoid valve at the check valve is reversed: the vehicle pressure will be low, the pilot pressure is quite high, and it will also hold the car.

    Ten：about walking weakness. For vehicles parked at the beach for a long time, the track shaft will rust to death, causing great walking resistance. Weak. Measure: Replace the track shaft.