TM 5-3805-248-23-2
AUTOMATIC TIMING ADVANCE UNIT MAINTENANCE - CONTINUED
0278 00
SETTING - CONTINUED
NOTE
Normal engine rotation is counterclockwise. If flywheel housing is not turned in direction of normal engine
rotation, or if it is turned past threaded timing bolt hole, rotate flywheel housing clockwise approximately 30
degrees. This is to remove any play in timing gears when engine is put on top center.
8.
Position timing bolt (8) and locate against flywheel
8
housing where plug (1) was removed.
9.
Rotate 1/2 in. (13 mm) ratchet on engine counter-
clockwise while holding timing bolt (8) in position
and hand tighten. Stop turning when timing bolt (8)
can be threaded into hole in flywheel housing.
10.
Install timing bolt (8).
11.
Check number one piston setting. Number one piston
should be at top center of compression stroke.
ENGINE
TURNING
TOOL 394-484
12.
Remove front valve cover (WP 0010 00).
13.
Check number one cylinder. If number one cylinder is
on the compression stroke, valves will be closed.
14.
Test rocker arm. With valves closed, rocker arm can
be moved by hand. If rocker arm cannot be moved,
rotate flywheel housing 360 degrees and repeat steps 9
and 11.
ROCKER ARM
394-485
0278 00-3
