First，the engine can not be started
①The battery power is insufficient and the voltage is low.
②The electromagnetic switch of the starter motor or the starter motor is damaged.
③ The starting line is faulty, and the starting switch is damaged.
④The fuel supply circuit is faulty.
⑤ There is atmosphere in the fuel system, and the fuel filter element is blocked.
⑥ Advocate the burning of the crankshaft of the machine, so that the crankshaft cannot be changed.
⑦The piston and the cylinder liner are sticky, and the piston cannot move.
Second, the engine operation is unstable, the load is large, and the car is stuck.
①There is atmosphere in the fuel system.
②The fuel filter is blocked.
③ The fuel oil pump is worn and the pressure is low.
④The fuel injection pump is worn and the pressure is low.
⑤ The fuel injector is worn and the fuel atomization is not good.
⑥ The fuel injection timing is not accurate.
Third，the engine power is lacking, and the exhaust emits black smoke.
①The air filter is blocked.
② The exhaust gas turbocharger is coke deposited or damaged.
③The electronic control system is faulty (the monitor has information display).
④The fuel pump, fuel injection pump or fuel injector is faulty.
⑤ The fuel injection timing is not accurate.
⑥ Piston, piston ring and cylinder liner are worn.
⑦ The valve is not tightly closed or faulty, and the valve clearance is inaccurate.
Fifth, the engine burns oil, and the loss of oil is large.
① Too much oil.
②The piston, piston ring and cylinder liner are worn.
③ The floating oil seal of the exhaust gas turbocharger is damaged.
④ valve guide split.
Sixth，there is oil in the water tank.
①The oil cooler core is split.
②The water seal of the water pump is damaged, and the drainage hole is blocked.
③The cylinder head gasket is damaged.
Seventh,there is coolant in the oil bottom
①The oil cooler core is split.
②The cylinder head gasket is damaged.
③The cylinder head or cylinder block has cracks.
Eight, low oil pressure.
①The amount of oil is lacking.
②There are diesel oil and coolant in the oil.
③ The oil filter is blocked.
④ The oil pump suction pipe is revealed.
⑤ The oil safety valve (bypass valve) is stuck in the overflow state or the spring is broken.
⑥The oil pump is worn.
⑦The clearance between the crankshaft or camshaft and the bearing bush is too large.
Ninth,the water temperature is too high.
①The coolant capacity is small.
②The thermostat is damaged.
③ The belt is loose and the fan speed is low.
④The water pump is damaged.
⑤ Advocate the overload operation of the machine.
⑥ Internal or external infarction of the water tank.
⑦ Advocate internal mechanical failure of the machine.
Tenth,the generator does not charge.
①The battery is damaged.
②The charging circuit or the grounding circuit is faulty.
③ Advocate wear and tear of electrical brushes.
④ The conditioner or rectifier diode is damaged.
⑤The rotor (excitation coil) is damaged.
Eleventh,the hydraulic pipe is trembling and the hydraulic pump is loud.
①There is atmosphere in the hydraulic pump.
②The swash plate or plunger shoe in the hydraulic pump is worn.
Twelfth,walk and stray.
①The crawler tension is adjusted improperly.
② The corresponding travel motor leaks, or the reducer is damaged.
③ The hydraulic pump leaks inside, and the flow rate is small.
④ There is a fault in the pilot circuit of walking control, or a fault in the main circuit of walking. ⑤ The inner oil seal of the center rotation is damaged and the oil is strewn.
Thirteen, walking slowly.
①The pilot control oil circuit or the main oil circuit components are faulty.
②The pilot pump or hydraulic pump is faulty.
③The oil seal in the center rotation is damaged and oil is strung up.
Fourteenth,weak walking and climbing, lack of digging force.
① The safety valve of the main circuit and pilot circuit is faulty and the pressure is low.
② Corresponding safety relief valve, equalizing valve, buffer valve and other faults.
③ Internal leakage of hydraulic pump, pilot pump and control valve.