How to Determine if an Oil Pump Engine Has Cylinder Scoring?
2 Answers
When diesel engine cylinder scoring occurs, the vehicle will experience jerking sensations, accompanied by significant abnormal noises from the engine. The RPM will also decrease, and there will be a noticeable drop in power. Here are the methods for cleaning the oil cylinder: Draining the Cylinder Fluid: Extract the hydraulic oil from the oil cylinder, trying to leave as little as possible at the bottom. Cleaning the Dirt: Open the oil cylinder cover and remove the oil sludge from the bottom. After cleaning thoroughly, use diesel to wash the oil cylinder and filter screen again. Once completed, drain all the waste oil and wipe the oil cylinder clean with a clean cloth. Filtering: After completing the above steps, wait for a while before pumping the hydraulic oil back in or filtering it through cotton gauze.
Last time I helped a friend deal with a similar issue. When an oil pumping unit experiences cylinder scoring, there will be obvious metal friction sounds, especially at low speeds—it sounds like sandpaper grinding. The oil pressure gauge needle will suddenly drop, while the temperature gauge shoots up. The most noticeable symptom is the sluggish power output; the pumping rod moves weakly. At this point, you must shut down the machine immediately—otherwise, by the time you see blue smoke from the exhaust pipe, it's already too late, as it usually means the piston rings and cylinder walls have already been deeply scored. I remember last time when we opened it up, the cylinder walls were scraped with shiny metal streaks. Such issues can’t be delayed—if you notice anything unusual, call the maintenance team right away, or the entire crankcase could be ruined.
