The reasons why the Perkins diesel engine oil circuit is always inlet air may be in the following aspects:
First of all, we need to understand the oil circuit system of Perkins diesel engines. The key components of the system include the fuel tank, transfer pump, injection pump, injector, and return pipe. The working principle of this system is that when the diesel engine is working, the fuel is delivered from the tank to the fuel injection pump through the fuel transfer pump, and then the fuel is pressurized by the fuel injection pump and injected into the cylinder through the fuel injector. In this process, any problem in any link may lead to the occurrence of air ingress into the oil circuit.
Next, let's analyze the causes that may cause air ingress into the oil path one by one
1.Fuel Tank Problems: Poor tank seals or untightened fuel caps can cause air to enter the oil system. At the same time, if the fuel in the tank is insufficient, it is also easy to generate negative pressure and draw air into the oil circuit.
2.Fuel pump problems: Aging or damage to the seal gasket of the fuel pump, loose screws of the oil transfer pump, etc., may allow air to enter the oil circuit.
3.Fuel injection pump problems: Aging or damage to the plunger seal of the fuel injection pump, loose screws of the fuel injection pump, etc. can also cause air to enter the oil circuit.
4.Injector problems: Aging or damaged injector gaskets, loose injector screws, etc. may cause air to enter the injector, further affecting the entire oil circuit system.
5.Return Line Problems: Aging or damage to the return line can cause air bubbles in the fuel to not be fully discharged, allowing air to become trapped in the oil circuit.
6.High engine temperature: If the engine is working under high load for a long time, it can cause problems with the cooling system, making the engine too hot. In this case, the moisture and gases in the fuel may evaporate, forming bubbles that can affect the fuel supply.
7.Poor fuel quality: If the fuel used is of poor quality, there is more moisture and impurities in it, which can lead to air build-up inside the fuel supply system.
In summary, there can be many reasons for air ingress into the oil circuit of Perkins diesel engines. In order to solve this problem, we need to troubleshoot according to the actual situation, find out the specific cause, and take corresponding measures to fix it. In the process of investigation, it is recommended to start from the following aspects: check the sealing of the fuel tank, tighten all screws, check whether the gaskets of the fuel transfer pump and fuel injection pump are aged or damaged, replace the gaskets, check whether the injectors and oil return pipes are normal, check whether the engine cooling system is working normally, check whether the fuel quality meets the requirements, replace high-quality fuel, etc. Through these measures, the problem of air intake into the oil circuit of Perkins diesel engine can be effectively solved and the normal operation of the engine can be ensured. At the same time, it is also very important to maintain and maintain the engine regularly to prevent similar problems from occurring.