TM 5-3805-262-34
2-4. ENGINE TROUBLESHOOTING (CONT)
MALFUNCTION
TEST OR INSPECTION
CORRECTIVE ACTION
11. DIAL INDICATOR HAND DOES NOT INDICATE 0.053 INCH WHEN PERFORMING VALVE TIMING
CHECK (PAGE 3-8) (Cont).
Step 4.
Notify general support maintenance to remove timing gear cover (page
4-67).
Check that timing marks on camshaft drive gear and crankshaft gear
are alined as shown.
a. If timing marks are not alined, remove camshaft and drive gear
(page 4-54). Check for damaged camshaft, key, or drive gear
(page 4-61).
b. If timing marks are alined, go to step 5 below.
Step 5.
Check backlash between cam-
shaft drive gear and crank-
shaft gear using dial indica-
tor at drive gear as shown.
Backlash should be 0.004 to
0.011 inch.
a. If backlash exceeds 0.011
inch, replace drive gear,
crankshaft gear, or worn
camshaft bushings (page
4-54) .
b. If backlash is 0.004 to
0.011 inch, go to step 6
below.
2-42
