Common Rail Fuel Injection Pump Parts Fuel Injection Pump 5264248 0445020150 for KOMATSU SAA6d107e-2 Qsb6.7 Excavator Engine

Common faults of diesel fuel injection pump

4. Gear bar stuck
The single-piece fuel injection pump rack lacks flexibility, which will cause the engine speed to be unstable, and in severe cases, cause a speeding accident.
The factors that cause the gear rod of the fuel injection pump to stick are:
Failure to install the small copper pad of the plunger positioning sleeve screw caused by inaccurate installation, the thickness of the gasket is not up to standard, and the screw is too long will cause problems such as deformation of the plunger sleeve and blocked rotation of the plunger when the positioning screw is tightened, which will eventually lead to Gear bar stuck.
In addition, the lack of flexibility of the plunger coupling itself, the bending of the head of the positioning screw and the wear of the parts are also common reasons for the sticking of the gear rod of the fuel injection pump.
5. Governor front casing hairpin and fuel injection pump governor flying ball bracket
The "speeding" phenomenon is also prone to occur when the governor's front housing card and the governor's flying ball bracket are overloaded when the motor is started.
The main reasons for this failure are:
Severe wear of the camshaft bearing of the fuel injection pump, excessive swing of the drive shaft sleeve of the governor, and severe wear of the inner hole of the fly ball bracket.
To sum up, there are usually many controllable or uncontrollable failures of marine fuel injection pumps during the entire use process. Its failures are not single and simple, but diverse and complex, and the causes of failures are even more strange. Complex, many failures are caused by a combination of multiple aspects.

Therefore, this reminds us that when checking and dealing with fuel injection pump failures on ships, it is necessary for the staff to be very familiar with the possible causes of the problem and have sufficient resilience.