Diesel Fuel Injection Pump Inspection and Cleaning Guide

Diesel Fuel Injection Inspection Methods

1.Perform sliding and sealing tests on the plunger coupling. First, tilt the plunger coupling at a 45-degree angle, pull out the cylindrical surface matching the plunger by approximately 1/3, and rotate the plunger once. Then align the piston's inclined groove with the return oil hole, and use your fingers to block the large end face of the plunger sleeve and the oil inlet hole. When the plunger end face reaches the edge of the return hole, if oil foam and bubbles appear, it does not meet the standard and needs adjustment.

2.Check the sealing cone of the oil outlet seat for scars, dents, and wear. Minor damage can be repaired; if severe, the seat should be replaced. If the nylon washer of the delivery valve matching part is severely deformed, the nylon washer should also be replaced.

3.Check if the shoulder plane of the plunger coupling installed on the fuel injection pump body is deformed. Any unevenness will affect the verticality of the plunger sleeve installation and the tightness of the shoulder interface, leading to poor plunger sliding and fuel leakage.

4.Inspect the wear of the fuel injection pump valve hole and camshaft. If wear is severe, they can be replaced.

5.If the flyweight angle and flyweight pin hole are severely worn, they should be replaced. After replacement, the mass difference between the two flyweights must not exceed 1g.

6.Other components with severe wear, defects, fractures, etc., should be replaced.

Diesel Fuel Injection Cleaning

Before cleaning the fuel injection system, it is necessary to know how to disassemble it, and then clean each component of the fuel injection system step by step.

Loosen the pressure adjusting nut, unscrew the pressure adjusting screw, then clamp the fuel injector in a vice and loosen the fuel injection sealing cap. Then, take out the remaining parts and clean them with clean diesel or gasoline. Use a drill bit or steel wire of the corresponding size to unclog the oil injection holes and oil passages. Finally, put the injector nozzle matching parts into diesel and pull the needle valve back and forth to clean it, ensuring the needle valve can slide freely.

Guangxi Dingbo Generator Set Manufacturing 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. Dingbo 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 [email protected].