ENGINE OVERHAUL PROCEDURES - GENERAL INFORMATION
Measure outer rotor-to-body clearance. Replace pump assembly
if clearance exceeds specification. Measure clearance between rotors.
See Fig. 31. Replace shaft and both rotors if clearance exceeds
specifications.
Fig. 31: Measuring Rotor Clearance - Typical
This Graphic For General Information Only
Install rotors in pump body. Position straightedge across
pump body. Using feeler gauge, measure clearance between rotors and
straightedge. Pump cover wear is measured using a straightedge and
feeler gauge. Replace pump if clearance exceeds specification.
GEAR TYPE
Oil pump gears must be marked for location prior to removal.
See Fig. 32. Remove gears from pump body. Inspect gears for pitting
or damage. Inspect cover for grooving or wear.