ARMY TM 9-2815-257-24
AIR FORCE TO 38G1-128-2
MARINE CORPS TM 10155A/2815-24/3
4-10. OIL PUMP MAINTENANCE
This task covers removal, cleaning, inspection, and installation.
Tool Kit, Master Mechanic (Item 3, App. B, Sect. III)
Engine oil drained (Para. 3-5)
Oil, Lubricating (Item 1-5, App. E)
Solvent, Dry Cleaning (Item 7, App. E)
Rag, Cleaning (Item 8, App. E)
Grease, Automotive (Item 9, App. E)
When removing crankcase cover, be careful not to damage oil seal.
Release crankcase cover (1, Figure 4-9) from cylinder block by removing fifteen screws (2). Carefully
separate crankcase cover from engine crankcase.
Remove cover gasket (3). Discard if damaged or deformed.
Remove oil pump cover (4) from crankcase cover (1) by removing three screws (5). Remove and discard
Remove parallel pin (7) and slide oil pump (9) out of crankcase cover (1). Remove outer rotor (8).
Remove and discard governor assembly (11) and pin (10).
Cleaning solvents are flammable and toxic to eye, skin, and respiratory tract. Skin and eye
protections are required when working in contact with cleaning solvents. Avoid repeated or
prolonged contact. Work in well ventilated area only. Keep away from heat, sparks, and
open flame. Do not smoke while using cleaning solvent. Failure to observe this warning
can result in injury or death to personnel.
Clean components with cleaning solvent and a clean rag. Allow to air dry.
Remove any old gasket material or grease from crankcase cover and engine crankcase mating surfaces.