Comment mieux entretenir le système moteur de l'excavatrice

1. Vérifiez le régime/la durée du moteur diesel

1. Shake the diesel engine on the diesel engine and observe the diesel engine speed. If ET or /MIM is displayed, check the speed/time sensor. When the roller rotates, the diesel engine speed signal may be abnormal. Once the ECM is able to calculate the diesel engine speed based on the signal, the mini excavator will be replaced by the diesel engine speed.

2. Check the diesel engine speed/time sensor calibration.

3. Confirm that the timing reference gear is installed correctly. If the gear is reversed, the diesel engine will not start. Check whether the position between the crankshaft and camshaft drive gears is correct. If necessary, correctly position and/or replace the drive gear.

2. Check the fuel injection drive pressure

1. Vérifiez le niveau d'huile.

2. If the diesel engine is to be repaired in the near future, there may be air in the fuel injection drive pressure circuit. Allow the diesel engine to fully warm up and load the diesel engine to exhaust air from the fuel injection pressure circuit.

3. Compare the actual drive pressure on the ET with the required drive pressure. If the difference between the two readings during the fault does not exceed 2MPa, the quality of the mini excavator means that the problem is not in the fuel injection pressure circuit.

4 Check the seal of the fuel injection pressure control valve. If the seal fails, replace the seal and repeat step 3.

5 Check whether the wiring harness connected to the fuel injection pressure control valve is open and/or short-circuited.

6 Measure the coil resistance of the fuel injection pressure control valve, which should be 4 to 16Ω; otherwise, replace the fuel injection drive pressure control valve.

7 Perform a fuel injection drive pressure test using ET. If the fuel injection drive pressure is low, the high-pressure oil circuit may leak.

1. Remove the plugs that spray out the fuel pressure control valve and the injector joint.

2. b. Stop the fuel injection using ET or the diesel stop switch.

3. Remove the valve mechanism cover.

4. Check the injector joint drain and cross cylinder block seal leakage and crankshaft diesel.

5. Eliminate the leak and repeat step D.

6. If the fuel injection drive pressure is still low during the start-up process, the fuel injection drive pressure control valve may be faulty, replace the fuel injection drive pressure control valve and repeat the steps of Xiaodang

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