FUSO 4M4 – LUBRICATION – OIL PUMP – Inspection procedure

Inspection: Driven gear, drive gear and gear and case
โ€ข Carry out the following inspection. Replace the oil pump if any defects are found.
(1) Sinkage of each gear from gear and case end surface

(2) Gear and case-to-tooth tip clearance for each gear

Inspection: Oil pump cover, driven gear, and gear and case
โ€ข Measure the clearance between each gearโ€™s shaft and the oil pump cover, as well as between each gearโ€™s shaft and the gear and case.
โ€ข If the measurements are not within the standard value range, replace the defective part(s).