Engine common faults
Difficult to start excavator in winter
Technical activities to restore its functionality, including various planned repairs and unscheduled fault repairs and repairs. The engine is still hot the next day when it catches fire, it will be much better, but remember to cover the engine, do not cover the supercharger (Thesupercharger), otherwise it will catch fire. When you find that the pressure of the engine cylinder always fails to reach the starting point, check the engine diesel pump and injector, check the pump at a professional maintenance and repair point, check the gap between the plunger and the atomization of the injector ( Condition), replace damaged parts. If the engine is severely worn, find a professional maintenance engineer to overhaul the engine. To add (Addto) the corresponding number of diesel (Diesel) (0, minus 10, minus 20, minus 35) excavator maintenance introduces the imported excavator hydraulic system comprehensively, systematically and specifically. The structure and working principle of the pump, valve, motor, hydraulic cylinder and auxiliary components in the hydraulic system are introduced in detail, and the disassembly, repair and installation methods of each piece are described in detail.
In each model, the electronic control system and fault diagnosis and elimination methods are also introduced systematically. Check the oil circuit, from the diesel tank to the joint of the high-pressure fuel pipe and the injector. Focus on the inspection of diesel filter, oil-water separator (separation), oil pipe, hand oil pump, and the oil inlet and outlet are prone to wax blocking.After these inspections are done, when you use the hand oil pump to pump oil, you feel a hard pressure. If you can't go down (open the key of the EFI car and see that the fuel supply is normal when you hit the motor), it means that the fuel circuit is normal. In addition, it is recommended to add a jiārù heat pipe and a heating filter element to the fuel tank. Some machines have a finer wood filter, such as a Carter excavator, you can go to the accessories department to buy a heating jacket to cover the wood filter. After the operation, drain the water in the machine cleanly or replace all the water in the water tank with antifreeze. In addition, it is recommended to cover the water tank with cotton to ensure that the temperature is constant and the liquid in the water tank is not frozen.