Excavator distributing valve is the main construction machinery in earthwork engineering. Excavator distributing valve is widely used in construction, road construction, water conservancy, open-pit mining and national defense engineering. If the excavator distribution valve is not maintained in time, various faults may occur.
1 The excavator distribution valve cannot be started or it is difficult to start
1.1 Electrical system faults
1.1.1 If the battery power is insufficient, charge the battery in time, check the liquid level of the battery, and replenish the electrolyte to the specified high level in time. If you find that the battery aging charging is poor, you should replace the battery, while paying attention to the daily maintenance of the battery, do not let the battery is often in a state of loss of power.
1.1.2 The starter is faulty. Repair or replace the starter.
1.1.3 Generator failure repair or replace the generator.
1.1.4 Line Fault Check and repair the line.
1.2 Engine oil circuits are faulty
1.2.1 Low pressure oil line gas resistance
Under the suction action of the oil delivery pump or injection pump, the fuel is sent from the tank to the high pressure pump through the low pressure oil circuit. If the low-pressure oil circuit is not tightly closed, or the oil level in the tank is too low, and the vehicle is parked and driven at an Angle, air will take the opportunity to enter the oil circuit; If the temperature is high, the fuel evaporates, it will also form an air resistance in the low pressure oil circuit, causing the engine to work unstable, automatic flameout or the engine can not start.
1.2.2 The oil circuit is blocked
The common parts of oil circuit blockage are the suction pipe in the oil tank, the filter screen, the diesel filter, the oil tank cap vent and so on. The main problem caused by the blockage of the oil circuit is the injection of non-standard diesel fuel, or the mixing of impurities during the refueling process. The key to prevention is to ensure that the diesel oil is clean and the oil circuit is sealed, the oil circuit is regularly maintained, the cleaning and maintenance of the diesel filter is strengthened, the filter element is cleaned or replaced in time, the oil tank is cleaned in time according to the operating environmental conditions, and the oil mud and water at the bottom of the oil tank are completely removed.
1.2.3 Failure of fuel injection pump
The plunger of fuel injection pump and the oil outlet valve are seriously worn, which makes it difficult to start the engine. In this case, replace the plunger and the oil outlet valve pair in time.
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2 The excavator distribution valve is weak
2.1 The engine power is sufficient and the operation is normal, while the excavator distribution valve is slow and the digging is weak.
2.1.1 The hydraulic pump of the distributing valve of the excavator is mostly variable piston pump. After working for a certain period of time, the internal parts of the pump will inevitably wear out, resulting in internal leakage and uncoordinated parameter data, resulting in insufficient flow, too high oil temperature, slow speed, and unable to establish high pressure, so the action is slow and weak. For such problems, it is necessary to remove the hydraulic pump for data measurement, confirm the problem, replace the parts that can no longer be used, or repair the parts that can continue to be used, and then assemble them again on the calibration station for debugging to match the loop parameters (pressure, flow, power and variables, etc.).
2.1.2 An important hydraulic component on the excavator distribution valve is the multi-way distribution valve, which has the main safety valve, secondary valve, relief valve, oil supplement valve, etc. If the pressure set by these valves does not meet the standard pressure
