1. Preliminary analysis of the problem.
First of all, we need to do a preliminary analysis of the problem. Perkins diesel engines are normal when driving cold, but they have problems with unstable idling when they are hot. This can involve a number of aspects, including the oil supply system, control system, mechanical components, etc. Therefore, we need to look at these possible causes one by one.
Second, the inspection of the oil supply system.
First of all, we need to check the oil supply system. Unstable idling during hot drives can be caused by uneven fuel supply or clogged oil circuits. We need to check that the fuel pump, fuel filter, fuel injector and other components are working properly, and we also need to check that the fuel tank is clean to ensure that the oil path is unobstructed.
3. Inspection of the control system.
Next, we need to check the control system. Unstable idling can be caused by a malfunction of the control system. We need to check whether the control unit, sensors, actuators and other components are working properly. If a fault is found, it needs to be repaired or replaced accordingly.
Fourth, the inspection of mechanical parts.
Finally, we also need to inspect the mechanical parts. Unstable idling can be caused by wear or loosening of mechanical parts. We need to check whether the engine, valves, pistons, crankshafts and other components are working properly, and we also need to check whether the fixing screws of the engine are loose.
V. Conclusions and Recommendations.
From the above analysis, we can conclude that the reasons for the unstable idle speed of Perkins diesel engine during hot car may involve many aspects such as fuel supply system, control system and mechanical components. Therefore, we need to investigate these possible causes one by one and repair or replace them accordingly. It is recommended to choose professional maintenance personnel when repairing to ensure the quality and safety of maintenance.