For a multi-cylinder diesel engine, whether it is a plunger or rotor type fuel injection pump and its high-speed gear, there is a separate closed lubrication section, which requires a separate oil, and a special device to check the oil level . However, it is easy to ignore this important lubrication site during maintenance. It should be pointed out that some diesel engine oil pump and the governor are connected between the two oils, such as the 495 diesel engine; and some diesel engine oil pump and governor cavity oil is not connected, such as , 12V135 diesel engine. For the latter, it is easier to inadvertently cause a failure. Here is an example of a fault. After a 12V135 diesel engine was working for about 30 minutes, a "traveling car" phenomenon suddenly appeared. After disconnecting the load, the speed is still fast and slow. Cleaning the fuel supply system and exhausting the air still does not eliminate the malfunction. I doubt that the governor has a problem. When the governor was disassembled when it was stopped, it was found that there was no drop of lubricating oil, the bearings had been completely damaged, and part of the speed-controlled flying block was blue, indicating that it had reached a very high temperature during operation. The original operator did not notice that the governor and the fuel injection pump were isolated. Only the oil in the injection pump cavity was filled with the oil, and the governor was in a dry state for a long time. Fortunately, it was discovered in a timely manner that it did not lead to "speed racing." After the bearings were removed and the engine oil was added, the work of the diesel engine returned to normal.
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