1. Turn on the oil tank switch, remove the oil inlet pipe of the oil delivery pump and check the oil flow. If the oil flow is fast, it indicates that it is normal. If the oil flow is intermittent, continue to check the oil circuit.

2、低压油流畅通后，可用手压泵排除油路中的空气，打开泵头放气螺钉，直到没有气泡时，方可上紧放气螺钉。

2. After the low-pressure oil flow is smooth, the air in the oil circuit can be removed by hand pump, and the air release screw at the pump head can be opened until there is no bubble.

3、确定油路畅通，柴油机供给系统没有空气后，可拆开油泵盖板，扳动操纵手柄，拨动油泵拉杆，看拉杆是否灵活和柱塞弹簧是否断裂。在拉杆灵活和柱塞弹簧没断的情况下，可启动柴油机中速运转10分钟，还有断火现象时，可用一只铜榔头轻轻敲击输油泵大螺帽，一边敲一边听柴油机声音，如果声音不正常，说明输油泵活塞和推杆发卡，进行修理或更换。

3. After confirming that the oil circuit is smooth and there is no air in the diesel engine supply system, the cover plate of the oil pump can be disassembled, the control handle is pulled, and the pull rod of the oil pump is pulled to see whether the pull rod is flexible and whether the plunger spring is broken. Under the condition that the pull rod is flexible and the plunger spring is not broken, the diesel engine can be started to run at medium speed for 10 minutes. In case of fire interruption, a copper hammer can be used to gently tap the big nut of the oil delivery pump, and listen to the sound of the diesel engine at the same time. If the sound is abnormal, it indicates that the piston and push rod of the fuel pump are jammed and repaired or replaced.

4、如不行则应考虑是油嘴不雾化，油泵柱塞弹簧和弹簧座断裂，卡死不工作，或是柴油内有水。拆下油嘴总成检查开启压力和雾化，如果油嘴总成正常，可让用户用干净柴油装入壶中用油路旁接法进行试验。若还有断火现象应考虑是发动机问题。

4. If not, it should be considered that the nozzle is not atomized, the plunger spring and spring seat of the oil pump are broken, stuck and not working, or there is water in the diesel oil. Remove the nozzle assembly to check the opening pressure and atomization. If the nozzle assembly is normal, the user can fill the pot with clean diesel oil and conduct the test with the oil way side connection method. If there is still the phenomenon of off fire, it should be considered that it is an engine problem.

5、拆下喷油器总成，转动曲轴数圈，即有水喷出，说明缸盖，缸体有裂纹或砂眼，遇到这种情况时，可向用户解释或向柴油机公司反映。

5. Remove the fuel injector assembly and rotate the crankshaft for several turns, which means that there are cracks or sand holes in the cylinder head and cylinder block. In case of this situation, explain to the user or report to the diesel engine company.

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