FUSO 4M4 – LUBRICATION – OIL PUMP – Inspection procedure

Inspection: Driven gear, drive gear and gear and case
• 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
• Measure the clearance between each gear’s shaft and the oil pump cover, as well as between each gear’s shaft and the gear and case.
• If the measurements are not within the standard value range, replace the defective part(s).


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