Secure the oil pump carefully in a vise (see fig. 25). Unscrew the bolts securing the intake pipe and remove it together with the oil pressure reducing valve 10 and the spring 3. Remove the cover 2, remove the pump shaft 1 with the drive gear and the driven gear from the housing.
Assemble the pump in reverse order. When assembling the pump, the rotation of the drive shaft must be smooth, without jamming.