The function of small excavator filter and daily problem solving

Jan 2nd,2025 233 Views

1. The engine cannot start

① The battery power is insufficient and the voltage is low. ② The electromagnetic switch of the starter motor or the starter motor is damaged. ③ The starter circuit is faulty and the starter switch is damaged. ④ The fuel supply oil circuit is faulty. ⑤ There is air in the fuel system and the fuel filter is blocked. ⑥ The crankshaft of the engine burns the bearings, making the crankshaft unable to rotate. ⑦ The piston and the cylinder sleeve of the engine are stuck and the piston cannot move.

2. The engine runs unsteadily, the load is large, and the engine is stuck.

① There is air in the fuel system. ② The fuel filter is blocked. ③ The fuel delivery pump is worn and the pressure is low. ④ The injection pump is worn and the pressure is low. ⑤ The injector is worn and the fuel atomization is not good. ⑥ The injection timing is not accurate.

3. The engine power is insufficient and the exhaust emits black smoke.

① The air filter is blocked. ② The exhaust turbocharger is carbonized or damaged. ③ The electronic control system is faulty (the monitor has information display). ④ The fuel delivery pump, injection pump or injector is faulty. ⑤ The 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.

4. The engine has a large exhaust volume.

The piston, piston ring and cylinder liner are worn.

5. The engine burns oil and the oil loss is large.

① Too much oil. ② The piston, piston ring and cylinder liner are worn. ③ The floating oil seal of the exhaust gas turbocharger is damaged. ④ The valve guide is broken.

6. There is oil in the water tank.

① The oil cooler core is broken. ② The water seal of the water pump is damaged and the drain hole is blocked. ③ The cylinder gasket is damaged.

7. There is coolant in the oil bottom.

① The oil cooler core is broken. ② The cylinder gasket is damaged. ③ The cylinder head or cylinder block has cracks.

8. Low oil pressure.

① Insufficient oil. ② There is diesel and coolant in the oil. ③ The oil filter is blocked. ④ The oil pump suction pipe is leaking. ⑤ The oil safety valve (bypass valve) is stuck in the overflow state or the spring is broken. ⑥ The oil pump is worn. ⑦ The gap between the crankshaft or camshaft and the bearing is too large.

9. The water temperature is too high.

① The coolant capacity is small. ② The thermostat is damaged. ③ The belt is loose and the fan speed is low. ④ The water pump is damaged. ⑤ The engine is overloaded. ⑥ The water tank is blocked inside or outside. ⑦ The engine has internal mechanical failure.

10. The generator is not charged.

① The battery is damaged. ② The charging circuit or the grounding circuit is faulty. ③ The engine brush is worn. ④ The regulator or the rectifier diode is damaged. ⑤ The rotor (excitation coil) is damaged.

11. The hydraulic pipe is shaking and the hydraulic pump is noisy.

① There is air in the hydraulic pump. ② The swash plate or plunger shoe in the hydraulic pump is worn.

12. Walking deviation.

① The track tension is improperly adjusted. ② The corresponding walking motor leaks, or the reducer is damaged. ③ Hydraulic pump internal leakage, small flow. ④ Travel control pilot circuit failure, or travel main circuit failure. ⑤ The oil seal in the center slewing comment is damaged, and oil is leaking.

13. Slow travel speed.

① Pilot control oil circuit or main oil circuit component failure. ② Pilot pump or hydraulic pump failure. ③ The oil seal in the center slewing is damaged, and oil is leaking.

14. Walking climbing power is weak, and digging power is insufficient.

① Main circuit and pilot circuit safety valve failure, low pressure. ② Corresponding safety relief valve, balancing valve, buffer valve, etc. failure. ③ Hydraulic pump, pilot pump and control valve internal leakage.

15. The electrical function of a certain circuit is not available.

① The corresponding fuse is damaged. ② This circuit component is damaged or the wire is faulty.

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