Home Products News Contact Us
Home > Supports > Diesel Generators

Reasons of Diesel Generator Fuel Pump Failure

Oct. 25, 2021

The function of the diesel generator fuel pump is to ensure that a sufficient amount of diesel is delivered from the fuel tank to the fuel injection pump, and to maintain a certain fuel supply pressure to overcome the resistance of the pipeline and the fuel filter, so that the diesel will circulate in the low pressure pipeline to ensure The operation of diesel generators, but when the oil pump of the diesel generator fails, it will directly affect the use of the unit. Therefore, we must promptly check the cause of the damage to the diesel generator oil pump. Next, Starlight Power Generation Equipment will talk to you about the cause of the failure of the diesel generator's fuel pump.


The external manifestation of the failure of the diesel generator's fuel delivery pump is insufficient fuel supply or no fuel supply. Insufficient fuel supply from the fuel pump will cause small diesel generators to fail to work under full load or only operate under no-load conditions. If the oil pump does not supply oil, the small diesel generator will not start. So what are the reasons for these problems in the oil pump? Starlight power generation equipment introduces you as follows:


diesel generator set.jpg


1. Problems with the inlet and outlet valves of the oil transfer pump


(1) The oil inlet and outlet valves are not closed tightly. Poor sealing of the inlet and outlet valves of the oil transfer pump will make it difficult to exhaust. The inspection method is to blow air at the outlet of the oil transfer pump. Normally, it should be blocked. If it can blow through, the oil outlet valve is not sealed; Inhale at the mouth. Normally, it should be blocked, otherwise the inlet valve is not sealed.


(2) Insufficient or broken springs of inlet and outlet valves. Insufficient elasticity or breakage of the inlet and outlet valves will also cause the same consequences as if they are not tightly closed, that is to say, it will cause the exhaust of the diesel generator to become difficult, everyone should pay attention to it together.


2. Piston problem of oil transfer pump


The problems of the oil transfer pump piston mainly include excessive wear of the oil transfer pump piston, piston stuck, piston spring broken, piston rod stuck, etc. The piston of the oil transfer pump is a very important focus in the principle of the oil transfer pump, when the piston-related parts or pistons When there is a problem, the force in the oil transfer pump will not be able to function correctly, then the operation of the oil transfer pump will have a problem.


3. The oil filter screen of the oil pump is blocked


If the filter screen of the oil inlet pipe joint of the diesel generator fuel pump is blocked, there will not be enough fuel to be delivered to the fuel injection pump, and the cylinder will cut off the fuel and cannot start. The oil inlet filter screen of the fuel transfer pump is a component that filters the diesel generator diesel. Generally, it filters out the impurities in the diesel, so as to provide the diesel generator with clean diesel. It will be filtered for a long time without cleaning. It will cause the filter to become clogged.


4. The hand oil pump is not shut down tightly


When the hand oil pump of the diesel generator is not closed tightly, some air will enter the oil pump, so that the internal pressure of the oil pump will become very large due to the air entering, so that there will be problems with oil suction, which is directly caused by the difficulty of oil suction. It will be a problem with the start of the diesel generator, or a failure in normal operation, etc.


5. Oil problem


The reasons for the problem that affect the oil supply are the loosening of the oil inlet pipe joint and the insufficient oil in the oil tank. These two reasons will lead to insufficient oil supply, and insufficient oil supply will directly cause the diesel engine to fail to start, or even the diesel generator to stop suddenly when it is running.


The above is the reason why the diesel generator oil pump is damaged by Starlight Power Generation Equipment. It can be seen that the reason for the failure of the oil pump is mainly the problem of the inlet and outlet valves of the oil transfer pump, the piston problem of the oil transfer pump, the blockage of the oil inlet filter of the oil transfer pump, and the hand The oil pump is not shut down tightly, there is a problem with the oil volume, etc. Therefore, you need to make specific maintenance measures according to the specific situation, so as to ensure the normal operation of the diesel generator.


Starlight Power was founded in 1974 and is one of the earliest manufacturers of generators and diesel generator sets in China. If you want get more information, welcome send email to sales@dieselgeneratortech.com we will pay highly attention on your question.

Contact Us
  • Adds: No.2 Xingguang Road, Guxi Industrial Park, Taixing, Jiangsu, China.
  • Tel: +86 771 5805 269
  • FAX: +86 771 5805 259
  • Cellphone: +86 134 8102 4441
                    +86 138 7819 8542
  • E-mail: sales@dieselgeneratortech.com
Follow Us

Copyright © Jiangsu Starlight Electricity Equipments Co., Ltd.All Rights Reserved | Sitemap

Contact Us