Install the injection pump

1. Before installing the fuel injection pump, all parts of the fuel injection pump should be cleaned to prevent dirt and impurities from being carried into the pump body during installation, resulting in early part wear. At the same time, special attention should be paid to the fitting of the plunger sleeve and the oil pump body so that no debris such as metal shavings, sand particles, and cotton yarn fibers can be formed to prevent oil leakage and damage to parts.
2. The plunger sleeve must not be reversed. Once the plunger sleeve is installed reversely, the plunger sleeve positioning screw is pressed against the oil inlet hole. The inlet and outlet oil of the plunger working stroke only depends on the oil return orifice, and the inlet and outlet oil quantities are small and slow, affecting the normal ignition of the engine. .
3, the positioning screw and gasket installation should meet the requirements: (1) The plunger set screw should meet the requirements, not too long, otherwise it will make the plunger sleeve is pumped in the top of the pump, affecting the plunger in the sleeve flexible movement Accelerating the wear of parts will also make the gap between the screw and the oil return hole too small, or even block the oil return hole, and cannot return oil in time, causing the engine to “fly”. (2) The plunger sleeve set screw should not be overtightened, otherwise it will deform the sleeve and hold the plunger. The installation requirements are: when the oil valve is not installed tightly, after tightening the positioning screw, the plunger can be moved within a small distance from the pump body, but no rotation occurs. (3) Do not miss the copper gasket with the set screw, and make sure that the seal is good. Otherwise, it will cause serious oil leakage, and it will cause air to enter the fuel injection pump, making the engine run unstable.
4. The gasket of the oil valve seat must not be leaked or damaged, but also requires leveling: (1) The high-pressure sealed copper mat and the low-pressure sealing rubber gasket of the oil valve seat must be carefully inspected prior to installation. The requirements are intact and no leakage is allowed. Installed, otherwise it will cause the high-pressure oil chamber to communicate with the low-pressure oil chamber, resulting in the oil pump can not work properly. (2) Tightening torque must be moderate when installing the oil valve tight seat. After tightening, ensure that the plunger can move flexibly in any position in the plunger sleeve, without any local seizure. (3) The gasket must be flat. If the gasket is uneven or wrinkled, after the oil valve is tightened tightly, the plunger sleeve is easily stressed unilaterally to accelerate the wear of the plunger parts.
5, according to the requirements, correctly adjust the fuel supply advance angle.

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