Common knowledge of spring use and maintenance plunger spring of fuel injection pump
The plunger spring of fuel injection pump will also be worn and deformed under the action of periodic high frequency alternating force, which will shorten its free length and weaken its elastic force. When the elastic force decreases, the return speed of plunger slows down. So. When the engine is running at high speed, the reciprocating motion of the plunger can not keep a harmonious relationship with the high-speed rotary motion of the oil pump cam, thus reducing the lift of the plunger and the corresponding reduction of the fuel supply, resulting in the decrease of engine power. Therefore, when the plunger spring is used for 3600 ~ 4500 h, it should be replaced in time
2020-07-19