Fuel Injection Pumps 101605-9880 400912-00061

In the complex mechanical structure of modern diesel engines, the fuel injection pump, as one of the core components, has a direct relationship between its performance and the operating efficiency and reliability of the diesel engine. In practice, the fuel injection pump 101605-9880 400912-00061 may appear two kinds of failures: plunger stall and camshaft roll key, these failures not only affect the normal operation of the diesel engine, but also may cause serious safety accidents. In this paper, the causes, effects and preventive measures of these two kinds of failures will be discussed in depth.

1. Fuel Injection Pump Plunger Stuck: The Hidden Killer of Diesel Engine Reliability

Fuel injection pump plunger stalling is a common problem in the diesel engine field. When tiny particles of impurities inadvertently fall into the precision gap between the plunger and the plunger sleeve, they are like a miniature file, gradually wear and jam the plunger's trajectory. This seemingly small change, in fact, has become a major hidden danger affecting the reliability of diesel engines. Plunger stagnation directly leads to the governor function is limited, diesel engine speed fluctuations, light impact on the power output, the heavier may trigger a “flying car” accident - that is, the diesel engine speed is out of control, or diesel engine accidentally stalled, to the equipment safety and personnel safety Safety of equipment and personnel to bring a double threat.

Negligence in the assembly process is the primary factor. If the connectors are installed too tightly, the pump body and plunger sleeve will be deformed or even cracked due to uneven force, which will lay a hidden danger for subsequent use. In addition, the oil mixed with water, oil viscosity is too high resulting in poor winter operation, as well as the commissioning of the oil selection is not appropriate, are common triggers of plunger stalling. Especially when the gel concentration and acidity of diesel fuel exceeds the standard, it will form a layer of oil film that is difficult to remove on the surface of the precision coupling parts of the fuel injection pump, which further aggravates the risk of stalling. Improper storage of new fuel injection pumps, such as packaging damage, moisture and rust prevention measures fail, will also accelerate the process. Therefore, ensuring assembly precision, choosing the right oil and strengthening routine maintenance are the keys to preventing plunger stalling.

2. Fuel injection pump camshaft roller key: the culprit of fuel supply angle shift

Fuel injection pump camshaft keying is another failure point that should not be ignored. The camshaft rolling key will directly lead to changes in the fuel supply angle, which in turn affects the combustion efficiency and power output of the diesel engine. This failure is mainly caused by two major reasons:

One is the mismatch between the taper surface of the camshaft and the taper surface of the bore of the oil pump spline sleeve during production or use. Ideally the fitting surface should be more than 80% to ensure a tight connection. However, when the two tapers do not match, the spline sleeve may loosen in a short period of time after installation and form a rolled key.

The second is a design defect, i.e., the length of the oil pump spline sleeve taper is shorter than the camshaft taper length. Theoretically, this length difference should be compensated by the camshaft nut tightly fixed, but in actual production, there are occasional parts that do not meet the design requirements, even if the nut is tightened, but also can not effectively fix the spline sleeve, resulting in increased axial clearance and outward movement of the spline sleeve, which ultimately triggered the roll key.

Keluo Construction Machinery utilizes advanced technology to optimize production processes, improve component fit and durability, and ensure that every detail is handled properly. At the same time, we have developed a maintenance team with professional skills and a high sense of responsibility to ensure timely and effective solutions to customer problems. 101605-9880 400912-00061 fuel injection pumps manufactured by Keluo Construction Machinery ensure the efficient and safe operation of diesel engines, and at the same time, constantly promote technological progress and innovation, contributing to the sustainable development of industrial society. Keluo Construction Machinery's fuel injection pumps 101605-9880 400912-00061 ensure the efficient and safe operation of diesel engines, while continuously promoting technological advances and innovations to contribute to the sustainable development of industrial society.