Introduce the temperature and viscosity of the fuel pump fluid

Fuel pump; After the wear of the drive shaft and bushing, the clearance between them increases, which will inevitably affect the pump oil volume. In this case, the method of repairing the active shaft or bushing can be used to restore its normal fit clearance. If the active shaft has slight wear, simply press out the old bushing and replace it with a standard size bushing, and the clearance can be restored to the allowable range. If the active shaft and bushing are severely worn and the fit clearance exceeds the standard, not only should the bushing be replaced, but the diameter of the active shaft should also be increased by chrome plating or vibration welding, and then ground to the standard size to restore the fit requirements with the bushing.