Troubleshooting and exclusion of diesel engine low pressure oil

Troubleshooting and exclusion of diesel engine low pressure oil
Fault phenomenon
1 Diesel engine is difficult to start, even exhaust pipes do not exhaust.
2 Loosen the diesel filter and the injector pump deflation screw or joint, press the hand pump, the oil-free effluent or a lot of bubbles.
cause of issue
1 The fuel tank switch has no open or oil in the tank.
2 fuel tank cover venting valve failure.
3 The tubing of the tank is blocked or detached from the upper portion.
4 The tubing of the fuel tank to the oil pump is broken.
5 Diesel filter cartridge or oil pump filter.
6 The oil pump does not pump the oil (the piston is damaged or bitten, the check valve is viscous, the sealing is not strict, spring break, etc.).
7 is air in the oil road.
Fault diagnosis and exclusion
1 Check if the oil surface of the fuel tank is too low or no oil, the tank switch is opened, whether the fuel tank cover is blocked, the tubing is blocked or leakage, etc., should supplement diesel or maintenance as appropriate.
2 Pump oil by the hand, if the pump handle is pulled, the suction is obvious, and after leaving the hand, it will automatically return, indicating that the fuel tank is blocked between oil roads between the oil tank to the oil supply, should be subjected to the shortage.
3 Use the manual pump pump oil, feel that the oil is not smooth, if there is no normal pump resistance, and the pump oil does not have oil, indicating that the low-pressure road is blocked or damaged, the oil pump piston is too much, the oil pump outlet oil valve The snaps or seal is not hurt, and the filter element should be drediated or replaced.
4 If the pump handle is inoperable, it feels a large resistance when the handle is pressed, and the diesel filter cartridge, the oil pump filter or filter is blocked between the oil-in-oil pump, and should be removed Dredger or replace the filter.
5 Troubled the oil pump, pull the oil pump, and pull the oil pump bar, if the discharged oil is bubble, explain the oil pipe joint of the oil pipe to the fuel tank. If the diesel is discharged, it means that the front tube is not faulty, it is a failure of the filter or later high pressure oil.

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