TM 9-2320-289-34
3-11.
TIMING CHAIN AND SPROCKETS REMOVAL.
This task covers:
a. Checking Timing Chain
b. Removal
Free Play
c. Inspection
INITIAL SETUP:
Equipment Condition
Tools/Test Equipment
l Crankcase cover removed.
• Dial indicator
(See paragraph 3-10)
a. CHECKING TIMING CHAIN FREE PLAY
1.
2.
3.
4.
Mount dial indicator to front of engine block (5). Position dial indicator plunger so that it contacts
timing chain (4) midway between camshaft sprocket (8) and crankshaft sprocket (9).
NOTE
When moving timing chain (4) to check free play, ensure that it is moved
parallel to front face of engine block (5).
Applying finger pressure on inside of timing chain, move timing chain (4) outward as far as it will
go. With timing chain in maximum outward position, set dial indicator to “O.”
Applying finger pressure on outside of timing chain, move timing chain (4) inward as far as it will
go. With timing chain in maximum inward position, note dial indicator reading.
Maximum free play with used timing chain (4) must not exceed 0.80 in. (20.3 mm). Maximum
free play with new timing chain must not exceed 0.50 in. (12. 7 mm). If free play exceeds this
limit, replace timing chain and sprocket.
TA50645
Change 2
3-33
