2-4. ENGINE TROUBLESHOOTING (CONT)
TEST OR INSPECTION
11. DIAL INDICATOR HAND DOES NOT INDICATE 0.053 INCH WHEN PERFORMING VALVE TIMING
CHECK (PAGE 3-8) (Cont).
Notify general support maintenance to remove timing gear cover (page
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
b. If timing marks are alined, go to step 5 below.
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
a. If backlash exceeds 0.011
inch, replace drive gear,
crankshaft gear, or worn
camshaft bushings (page
b. If backlash is 0.004 to
0.011 inch, go to step 6