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Oil Leakage of Crankshaft Oil Seal of Cummins Diesel Generating Set

Jul. 25, 2023

The front oil seal of the crankshaft of the Cummins diesel generator set has oil leakage fault, so why does the oil seal oil leakage fault occur when the Cummins diesel generator set has not been running for a long time? In this article, Dingbo Power Generation Equipment will provide users with a brief analysis, and the specific content is as follows:


Cummins 250 kw diesel generator


The front oil seal of the crankshaft of the Cummins diesel generator set leaks oil, which is an oil seal fault. It is impossible to prevent oil leakage. Although the oil leakage rate is not high among the multiple oil seals of the Cummins diesel generator set engine, it is also very cheap, but there are many replacement and disassembly parts, and the labor cost is high, which is a typical minor ailment. So, the reasons for its failure have been analyzed by engineers, but there are only three points.


(1) The aging oil seal of Cummins diesel generator set engine can only be a rubber product in Cummins diesel generator set engine accessories. Rubber products are used in engine components with good toughness and economic practicality, but they cannot achieve breakthroughs in service life, which is also an obstacle that rubber products cannot overcome. In addition, the crankshaft oil seal is often exposed to high temperatures while the engine is running, which accelerates its own aging and can lead to a certain period of time when it becomes unstable.


(2) The oil leakage of the additional grinding oil seal caused by the substandard oil used by the engine of Cummins diesel generator set seems to have nothing to do with the oil, but the quality of the oil determines whether the oil seal will be damaged prematurely. As for the front oil seal of the crankshaft, its inner diameter is usually smaller than the outer diameter of the front part of the crankshaft. The oil seal cannot guarantee oil leakage due to its own elasticity, so a spring is added around the inner diameter to protect the oil with the force of the spring. This creates friction with the crankshaft, and with the high-speed operation of the engine, once the oil is not qualified, the lubrication performance decreases, There will be dry wear between the inner diameter of the oil seal and the front of the crankshaft. Many times, when we remove the oil seal, there will be a shallow mark in the position of the oil seal.


(3) The uncertain position of external forces determines the risk. The position of the crankshaft front oil seal is prone to damage and oil leakage caused by uncertain factors. Through our observation of replacing the crankshaft front oil seal in recent years, the first factor is that the debris and dust from the belt adhere to the inner diameter of the oil seal, which allows these debris to be seized and cause accidental wear and oil leakage; The entanglement caused by floating objects during wading directly causes oil seal damage and oil leakage.


The above is the reason why Cummins diesel generator set engine crankshaft oil seal oil leakage fault was analyzed by Dingbo Power Generation Equipment for the majority of unit users. Finally, Dingbo Power Generation Equipment kindly reminds the majority of users that once the crankshaft oil seal oil leakage is found, Cummins diesel generator set engine may be short of oil and wear, and the outflow of oil will also be a safety hazard for the entire machine room. So, regular inspection is very important.


As a professional diesel generator manufacturer, we always insist on using first-class talents to build a first-class enterprise, create first-class products, create first-class services, and strive to build a first-class domestic enterprise. If you would like to get more information welcome to contact us via sales@dieselgeneratortech.com.

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