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Man-made failure of several diesel engines
Fuel injector mounting A driver is having trouble starting the engine after replacing the Dongfang Hong-120 Tractor Plunger. The crank is checked, the injection sound is good, and the cylinder pressure is normal. Finally, remove the injector and check that the direction of the injection hole is incorrect. After the correct installation, the fault is eliminated. The tappet topped an agricultural tricycle. During the journey, the driver discovered that the screw next to the high-pressure pump was leaking oil, and the wrench was used to tighten the screw, but the engine was no longer shaking. It turned out that the screw is the guide pin of the tappet and it plays the role of guiding the tappet body up and down. After tightening (especially after losing the washer), the tappet will be top dead so that the oil pump cannot supply oil, and the engine cannot start. After installing the screw correctly (tighten the screw and retract it a half turn), troubleshoot. After shortening the bungee there was a small four-wheel tractor. After the pilot replaced the cylinder, piston, piston ring, etc., when the test was performed, the engine oil was severe, the engine temperature was high, and there were signs of a car accident. After interrogating the operator, he turned out that the brace spring of the combined oil ring reduced the external ring support force and the oil scraping ability of the oil ring weakened, causing the above-mentioned failure. The new oil ring was replaced and the locomotive operated normally. Misplacing a Plunger A three-wheeled vehicle equipped with a R175 diesel engine. In order to make the engine strong, the piston of the 190 diesel engine was replaced. As a result, the engine power was not increased, but serious black smoke occurred. The exhaust pipe was not used for a few days. It was blocked by coke, making the diesel engine unable to work. The R175 diesel engine piston was replaced again, and the exhaust pipe carbon was removed and the diesel engine was working properly.