ARMY TM 9-2815-259-24
AIR FORCE TO 38G1-125-2
MARINE CORPS 09249A/09246A-24
5.4. SHORT BLOCK ASSEMBLY
5.4.1. CAMSHAFT ASSEMBLY.
The following procedures require complete access to the engine. If
necessary, remove engine from generator set, refer to TM 9-6115-671-14.
Mount engine on repair stand (NSN 4910-01-016-1835 or equal) as outlined
in paragraph 4.10.
a. Inspection Prior to Camshaft Removal.
Remove timing gear cover, refer to paragraph 4.9.2.
Inspect camshaft gear for chipped, broken, or missing teeth. If camshaft gear has chipped, broken,
or missing teeth, camshaft must be removed and the camshaft gear replaced. Refer to refer to
b. End Play Test.
If not already performed, remove timing gear cover. Refer to paragraph 4.9.2.
Attach magnetic base of dial indicator to front plate.
Position dial indicator against end of camshaft and zero dial indicator.
Measure camshaft end play. Camshaft end play should be 0.003 - 0.009 in. (0.08 - 0.23 mm). If
camshaft end play exceeds specifications camshaft must be removed from engine and inspected,
refer to step c.
Remove camshaft, refer to step c, or install timing gear cover, refer to paragraph 4.9.2,
If not done previously, remove engine. Refer to TM 9-6115-671-14. Install engine on rotating
repair stand, refer to paragraph 4.10.
If not done previously, drain engine oil and coolant, refer to TM 9-6115-671-14.
Remove rocker arm cover, refer to paragraph 4.7.1.
Measure valve lift for excessive wear, refer to paragraph 4.7.2. If valve lift shows excessive wear,
cylinder head must be removed for inspection of cylinder block, cylinder head, and camshaft
followers, refer to paragraph 4.7.4.
Lock engine at No. 1 TDC compression, refer to paragraph 4.7.2.
Remove rocker arm assembly and push rods, refer to paragraph 4.7.3.