490 How to install unmarked injection pump timing gear

1. Rotate the crankshaft and adjust the engine to the compression stroke of one cylinder. At this time, the intake valve and the exhaust valve are fully closed. The intake valve of the four cylinders is closed and the exhaust valve is opened.
2. Continue to slowly rotate the crankshaft and observe that the 4-cylinder intake valve has just started to open a little and immediately stop the crankshaft.
3, put the fuel pump inside the diesel, slowly positively rotate the fuel pump, look at the oil surface on a cylinder plunger, just rise a little, that is, a cylinder began to supply oil, and immediately stop the rotation,
4, at this time the fuel pump can be installed on the engine. Observe the engine exhaust fumes. When the oil supply is not accurate, loosen the injection pump fixing screw and rotate the injection pump to fine tune it.

When an oil pump injects oil, an angle at which a cylinder is compressed before top dead center is different. When you do not know the exact angle, you can follow the method of appeal according to the injection pump and fine-tune it according to whether the fire and smoke are normal. It is also possible to observe the scale on the flywheel, which is usually determined first in the middle of several scales.

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