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Analysis of Insufficient Compression Force of Diesel Generator Set

Aug. 03, 2023

When a diesel generator set is difficult to start successfully or cannot be started at one time when it is started, our engineers of the diesel generator set manufacturer generally first judge that it is caused by the failure of insufficient compression force of the engine. So what are the symptoms of insufficient engine compression? How will the malfunction be repaired? Next, the diesel generator set manufacturer will talk slowly.


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Condition during troubleshooting of insufficient compression force of diesel generator set engine: during inspection, when rotating the crankshaft with external force, the resistance of compression stroke is not large.


Diesel generator set engine compression failure and troubleshooting maintenance methods are as follows:


Failure phenomenon of insufficient compression force of diesel generator set engine: the diesel generator set cannot be started.


Causes of engine malfunction and maintenance troubleshooting methods: engine valve leakage


(1) The engine valve clearance is too small and does not close tightly; Check and adjust the valve clearance to meet the technical requirements specified in the manual;

(2) Severe carbon accumulation on the valve, causing the valve stem to bite; Open the cylinder head, remove carbon deposits from the valve, clean the valve, and add lubricating oil to the valve stem;

(3) The valve cone and seat are severely worn, resulting in poor sealing. Repair and grind the valve.


The piston ring is severely worn, and there is air leakage between the piston ring and the cylinder liner. Disassemble the piston and replace the piston ring.


(1) Excessive clearance between piston and cylinder liner; Replace the piston or cylinder liner according to wear.

(2) If the piston rings are stuck or the notches of each ring overlap, clean the piston rings and stagger the notches of each ring.


Guangxi Dingbo Generator Set Manufacturing Co.,Ltd has been established for many years. In addition to strict requirements on the quality of diesel generator set products and after-sales service, it also has strict regulations on the plant environment, production equipment and supporting facilities, which reflects the strict style of Dingbo people. It is not only responsible for generator products, customers, but also employees, so that every employee of Dingbo Power generation equipment can work in a comfortable environment, Make it comfortable for every visiting customer to visit. Dingbo Power Group, relying on high-quality generators, generator sets, diesel generator, diesel generator sets, good services and the care of friends from all walks of life, carries forward the enterprise spirit of "pragmatic innovation, pioneering, unity and hard work, dare to be the first", and adheres to the enterprise style of "treating people with sincerity and heart to heart", has won the strong support of customers in the fields of post and telecommunications, finance, petrochemical, metallurgy, transportation, education, medical care, etc, Having a proud performance. Dingbo people are gradually moving towards economies of scale and entering the international market after joining the WTO with flexible sales strategies and relying on the company's advantages and strength. If you would like to get more information welcome to contact us via sales@dieselgeneratortech.com.

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