Machinery Engine Parts QST30 Fuel Injectors 3092639 3093293 4025281 Fuel Injector Repair Kits

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To properly maintain the accessories of the fuel injection pump
The side cover of the pump body, oil dipstick, oil filling plug (respirator), oil overflow valve, oil pool screw plug, oil level screw, oil pump fixing bolt, etc., must be ensured to be intact and undamaged. These accessories play a crucial role in the operation of the fuel injection pump. The side cover can prevent the invasion of impurities such as dust and water, the respirator (with a filter) can effectively prevent oil deterioration, and the oil overflow valve ensures that the fuel system has a certain pressure and does not enter the air. Therefore, it is necessary to strengthen the maintenance of these accessories and promptly repair or replace them if any damage or loss is found.
Regularly check and adjust the fuel supply advance angle of the fuel injection pump and the fuel supply interval angle of each cylinder.
When in use, due to the loosening of the coupling bolts, wear of the camshaft and roller body components, the fuel supply advance angle and the fuel supply interval angle of each cylinder often change, causing diesel combustion to deteriorate, the power and economy of the diesel engine to deteriorate, and difficult to start, unstable operation, abnormal noise and overheating. In practical use, most drivers attach great importance to the inspection and adjustment of the overall fuel supply advance angle, but neglect the inspection and adjustment of the fuel supply interval angle (involving the adjustment of the single pump fuel supply advance angle). This results in the first cylinder fuel supply timing after the overall adjustment, but the rest of the cylinders do not necessarily have the fuel supply timing due to wear and tear of the camshaft and roller transmission components, which can also lead to difficulties in starting the diesel engine, insufficient power, and unstable operation. Especially for fuel injection pumps that have been used for a long time, more attention should be paid to the inspection and adjustment of the fuel supply interval angle.
To ensure the high cleanliness of diesel entering the fuel injection pump, it is important to ensure proper use and filtration of diesel fuel.
Generally speaking, diesel generators have much higher requirements for diesel filtration than gasoline engines do for gasoline. When using, it is necessary to choose diesel that meets the required grades and undergo sedimentation for at least 48 hours. Strengthen the cleaning and maintenance of diesel filters, and promptly clean or replace the filter element; Clean the diesel tank in a timely manner according to the working environment conditions, thoroughly removing the sludge and water at the bottom of the tank. Any impurities in the diesel will cause serious corrosion or wear to the fuel injection pump plunger, outlet valve coupling parts, and transmission components
Regularly check the camshaft clearance.
The axial clearance requirement for the camshaft of the fuel injection pump is very strict, generally between 0.03 and 0.15mm. If the clearance is too large, it will intensify the impact of the roller transmission components on the working surface of the cam, thereby increasing the early wear of the cam surface and changing the advance angle of fuel supply; Excessive clearance between the camshaft bearing shaft and the radial clearance can easily cause unstable operation of the camshaft, shaking of the oil adjustment rod, and periodic changes in fuel supply, resulting in unstable operation of the diesel engine. Therefore, regular inspection and adjustment are necessary. When the axial clearance of the camshaft is too large, shims can be added on both sides for adjustment. If the radial clearance is too large, it is generally necessary to replace it with a new one.
Regularly inspect the wear of relevant keyways and fixing bolts.

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