Reasons for failure of fuel transfer pump:
Generally speaking, the mechanical oil transfer pump is very reliable. Even if there is a failure, it is often the rupture of the diaphragm that causes insufficient oil delivery. Sometimes the oil pump rocker arm or spring is excessively worn, which will also cause insufficient oil delivery. This fault is easy to identify. The old oil transfer pump can be repaired, but the new oil transfer pump cannot be disassembled, so it needs to be replaced once it fails.

Maintenance method:
Generally speaking, the mechanical oil transfer pump is very reliable. Even if there is a failure, it is often the rupture of the diaphragm that causes insufficient oil delivery. Sometimes the oil pump rocker arm or spring is excessively worn, which will also cause insufficient oil delivery. This fault is easy to identify. The old oil transfer pump can be repaired, but the new oil transfer pump cannot be disassembled, so it needs to be replaced once it fails.

1. First, check whether the push rod driving the diaphragm in the pump mechanism is damaged. Gently block the oil inlet of the oil pump with your finger and try to start the engine. If you feel suction at this time, it can prove that the push rod is intact.

2. The finger tip is not attracted, indicating that the push rod is damaged, and the fuel injection pump should be replaced as a whole.
Note: When the electric fuel injection pump is working, if it emits a strong pumping sound, it indicates that the pump is in good condition. If there is no pumping sound, it indicates that the fuel supply pump has failed.

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