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A Summary Of The Fault Of The Komatsu Excavator

Jul 15, 2018

1 bolt with part 03012-01290 is bolt length 90mm and diameter 12mm..


2 the Komatsu part number consists of 10 digits, of which the start of "6" is the engine parts.


3 oil has the following functions: lubrication, cooling, sealing, anticorrosion, rust prevention and cleaning.


4 in the CLSS system, the PLS pressure is a very important signal, in PC200-8, the PLS pressure flow passes through the shunt valve, the LS shuttle valve, the LS valve, the LS selection valve, the pressure compensation valve, the unloading valve, the LS slow return valve and the LS bypass valve.


The structure of the 5 WA380-3MAX hydraulic torque converter is a single stage single phase three element, of which "single stage" represents a turbine, "single phase" means that the guide wheel is fixed, "three elements" represent the pump wheel, turbine and guide wheel, and the turbine is connected with the input shaft of the gearbox.


6 under normal circumstances, the hammer must be filled with butter once every two hours of continuous work.


The self decompression pressure of 7 PC220-8 should be 31 + 2kg/cm2, and the self decompression pressure of PC60-7 should be 38 + 1kg/cm2..


8 the standard clearance of intake valve for Komatsu 102 engine is 0.25mm, and the clearance of exhaust valve is 0.51mm.


The main control valve of the 9 WA380-3 loader gearbox is the control valve which integrates electric and hydraulic pressure. It controls the release of parking brake and the 8 speed gear of the machine walking. And the hydraulic torque converter is also controlled by the main overflow valve. The main control valve is the nerve center of the WA380-3 walking system.


10 the engine model of Komatsu PC70-8 is SAA4D95LE, the rated power is 48.5KW, and the standard bucket capacity is 0.3m3.


11 in the decoration manual, numbers and letters are often used to indicate the specifications of the wiring harness. "0.85YB" indicates that the wire diameter of the wire harness is 0.85mm2, and the line color is the black line of the Yellow bottom.


The voltage of the 12 PC200-8 hybrid electric vehicle's orange high pressure line and the accumulator is about 550V, so it is not allowed to disassemble freely. When the electric voltage is discharged to the safe voltage 36V, it can be repaired.


13 5.6K Omega =5600 Omega, 12550mA=12.5A.


14 under normal circumstances, when the external pressure is higher than 140kg/cm2, the PC valve starts to work.


The 15 below is the structure of the LS valve, in which PPL, PLP, and PSIG respectively represent the input or output of a certain pressure. PPL indicates the pressure input of the PC valve, PLP indicates the control pressure outlet of the LS valve and PSIG represents the LS-EPC pressure input port.


16 the gear shift of PC220-8 walking speed is mainly changed by changing the main pump displacement and motor capacity.


17 in a Komatsu engine, the ratio of camshaft timing gear to the timing tooth number of fuel injection pump is 1:1.


18 the flow of diesel in the fuel system of the EFI engine is first from the fuel tank through the oil water separator to the additional filter core to the pilot pump, then filtered through the diesel filter core to the high pressure oil pump, and then from the public oil tank to the injector. Finally, the injection is completed.


19 the information code displayed on the monitor usually has three kinds, namely user code, service code and fault code.