ARMY TM 9-2815-257-24
AIR FORCE TO 38G1-128-2
MARINE CORPS TM 10155A/2815-24/3
5-9. CAMSHAFT ASSEMBLY MAINTENANCE - cont.
Inspect gear (5, Figure 5-10) for broken, chipped, or worn teeth. Replace gear and camshaft (10) as an
assembly if gear is damaged or worn.
Inspect outer surfaces of tappets (6, 7) for wear or damage. Check condition of tappet contact point.
Measure the outside diameter (OD) of tappet stems. OD must be 0.2705 inch (6.87 mm), minimum.
Replace tappet if damaged, worn, or out of limits.
Measure the OD of camshaft (10) where it mates to crankcase cover bearing (4). OD must be 1.1772
inches (29.90 mm), minimum. Replace camshaft (10) and gear (5) if out of limits.
Measure the OD of camshaft (10) on opposite end (where it mates to cylinder block needle bearing). OD
must be 0.5874 inch (14.92 mm), minimum. Replace camshaft (10) and gear (5) if out of limits.
Measure the internal diameter (ID) of bearing (4). ID must be 1.1808 inches (29.993 mm), maximum.
Replace bearing if out of limits.
Insert tappets (8, 9, Figure 5-10) into cylinder block. Install push rod tappets (6, 7).
Carefully insert assembled camshaft (10) and gear (5) into cylinder block. Align match-marks on camshaft
gear with those on crankshaft gear, then press camshaft (10) into crankcase needle bearing
Apply grease to lips of crankshaft oil seal (located in crankcase cover (1)).
Apply oil to crankshaft and camshaft. Make sure that oil pump drive gears are properly engaged.
Mate cover gasket (3) to cylinder block.
Mate crankcase cover (1) to cylinder block and secure using fifteen screws (2). Tighten screws in criss-
cross sequence as shown in Figure 5-11. Torque all screws to 14.5 to 16.6 ft-lbs. (200 to 230 kg-cm).
Install fuel injection pump (Para. 4-12).
Service engine oil (Para. 3-6).