Engine Oil Pressure Gauge Failure of Diesel Generator Set

The level of the engine oil pressure of the diesel generator set indicates the quality of the technical state of the lubrication system. Conversely, whether the technical state of the lubrication system is normal can also be reflected from the oil pressure gauge. Once the oil pressure gauge indicates abnormality, stop the vehicle immediately to check and eliminate it.

1. The oil pressure has been very low

The oil pressure gauge always indicates below 0.1Mpa whether the diesel generator set engine is at low speed or high speed, low temperature or high temperature. And accompanied by the oil pressure warning light flashing, this is the oil pressure is too low: the reasons should be checked from the following aspects: first unscrew the oil dipstick. Check whether the oil in the oil pan is enough and whether the oil is too thin; secondly, check whether the oil pressure gauge and the induction plug are out of order, remove the wire of the induction plug and directly ground it. At this time, if the oil pressure returns to normal (or remove the induction plug and start the engine briefly) or the oil is sprayed from the oil passage, the pressure is very high, and the fingers cannot hold it, indicating that the induction plug is damaged; then replace the test with a good oil pressure gauge , If the oil pressure is normal, it means that the crude oil pressure gauge is damaged; check again whether the process oil plug on the body is loose, whether the oil pipe is broken, whether the pressure valve is stuck, whether the oil filter is blocked, etc. (remove the oil sensor Plug, start the engine briefly, if there are air bubbles in the center of the oil sprayed from the channel, it means that the oil inlet pipe is inhaling); finally, check whether the oil pump is seriously worn.

2. The oil pressure suddenly drops to zero

During the operation of the diesel generator set engine, the oil pressure gauge indication suddenly drops to zero from the normal value, accompanied by the flashing of the oil pressure warning light. At this time, you should first check whether there is oil in the oil pan. If there is no oil, it means that the oil pipe is broken, cracked or the oil drain plug of the oil pan is loose, resulting in oil leakage. Next, check whether the oil pressure gauge and the induction plug are damaged. Then check the oil pump drive shaft, whether the drive pin is broken and the oil pump stops working. Finally, check whether the oil filter is blocked by foreign objects, whether the connecting rod bearing purification oil cavity screw plug is loose, etc., and remove it in time.

3. The oil pressure suddenly increased a lot

When the diesel generator set engine is running at medium or high speed, the oil pressure gauge suddenly increases from the normal value, and exceeds the pressure limit value of the pressure limiting valve by 0.5~0.6Mpa, and the oil pressure cannot quickly drop to the specified value after the engine speed is reduced. At this time, first check whether the oil pressure gauge is damaged (after the engine is turned off, the oil pressure gauge still indicates pressure, that is, the pressure gauge is damaged); then check whether the main oil passage behind the gauge is blocked (you can unscrew the main oil passage process screw to clear the ); check whether the pressure limiting valve and the oil return valve are stuck and cannot be opened; check whether the nozzle hole of the rotor type oil filter is blocked, which causes all the oil to enter the main oil passage from the coarse filter, resulting in an increase in the oil pressure.

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