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Troubleshooting Methods for Diesel Engines

Jul. 09, 2021

Diesel engines are the main power in construction machinery. If the equipment fails mechanically during operation, it will cause damage to the basic parts at a minimum, and cause major mechanical accidents. Therefore, everyone must follow the correct methods and methods in the process of troubleshooting. step. The general working order of troubleshooting should be to study the failures in an orderly manner, then find the reasons in the order from simple to complex, and finally eliminate the failures in a planned way. Below, the technicians of Starlight Power Group will lead you to familiarize yourself with the detailed methods of diagnosis and troubleshooting of diesel engine faults.

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1. Think, observe, and carefully study failures before taking action.

1) What warning features have occurred before the failure. Under normal circumstances, before a diesel engine malfunctions, its speed, sound, exhaust, water temperature, oil pressure, etc. will show some abnormal signs, that is, failure signs. The staff can quickly make correct judgments based on the characteristics of the omen, and take decisive measures to avoid accidents. For example, if the valve leaks, the engine will emit black smoke; if the crankshaft bush and journal are worn too much, the engine will emit a dull "boring" knocking sound.

2) What repair and maintenance work has been done before. Usually some improper repairs or maintenance will cause some failures, and the staff can find clues from these repairs or maintenance.

3) Whether there has been a similar failure before.

4) If the engine is still running, let it continue to run for more inspections to see if the equipment is safe.


2. Start with the simplest and easiest reasons to check. Most of the faults are simple and easy to eliminate. The staff should check the easiest and obvious things first, so as to save time, quickly find out the cause, eliminate the fault, and reduce unnecessary troubles. For example, "insufficient power" is usually caused by loose throttle mechanism and dirty fuel filter; "excessive oil consumption" is usually caused by leakage of gaskets and oil pipe joints.


3. Repeat the inspection and thinking before starting the disassembly work. Most engine failures do not just originate from a component, but can be traced back to the relationship between the components. In the process of troubleshooting, there is often such a situation: the entire engine is disassembled to find the cause of a certain failure, so that all clues to find the fault are destroyed in the process of dismantling. So you should check your thinking again to see if you have overlooked an easy solution. For example, not charging is not only a fault in the governor, it may also be caused by a loose fan belt.


4. Find out and eliminate the root cause of the failure. After the mechanical failure is corrected, the root cause of the failure must be found and eliminated to avoid similar failures later. "Injector plunger sticking" can be solved by replacing the failed plunger, but there is always a factor that causes the plunger to stick. This may be improper adjustment of the fuel injector, or it may be caused by the fuel. Caused by water and other reasons.


If you can diagnose and eliminate diesel engine faults in accordance with the above four steps, you can basically find out the cause of the fault and the troubleshooting method, and avoid messy and clueless situations. Of course, the content shared by Starlight today is only part of the use, repair and maintenance of diesel generator sets. More technical guide content Starlight will sort out and share with everyone as soon as possible. Welcome your continued attention!


Jiangsu Starlight Power Generation Equipment Co., Ltd. was founded in 1974 and is one of the earliest manufacturers of generators and diesel generator sets in China. The company has a registered capital of 218.88 million yuan. The company covers an area of 86,000 square meters and a building area of 55,000 square meters. There are more than 660 employees, including 456 professional technicians and 106 senior technicians. It has 46 sales and service outlets nationwide. The main products are diesel engines, generator sets, and diesel generators, providing users with a one-stop service of design, supply, debugging and maintenance at any time. Starlight has always insisted on using first-class talents, building first-class enterprises, manufacturing first-class products, creating first-class services, and making every effort to build a first-class domestic enterprise. If any question please feel free to visit our website https://www.dieselgeneratortech.com/ or send email to sales@dieselgeneratortech.com

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