TM 5-3825-229-14&P
4-47. VALVE ADJUSTMENT
THIS TASK COVERS:
Adjustment
INITIAL SETUP:
Equipment Condition:
Tools Required:
Ref
Conditions
Nomenclature:
4-22
Battery disconnected
General Mechanics
4-56
Engine housing removed
Too[ Kit
NOTE
Allow engine to cool before adjusting valves.
a.
Remove cap nuts and gaskets (1), rocker arm cover
(2) and rocker arm cover gasket (3).
b.
Remove cap plug (4) from flywheel housing to
expose timing pointer (5) and timing indicator (6).
c.
Hold START switch on remote control box in the
start position momentarily to "jog" engine until
number one (front) cylinder is on the compression
stroke and the 0° TDC mark on the flywheel lines up
with the timing indicator.
NOTE
With the number one piston at TDC (top dead
center), the crankshaft can be turned 90 in either
direction without the valves on number one
cylinder opening. If. the valves open during this
test, the crankshaft must be turned one complete
revolution (360) counterclockwise as viewed from
the flywheel.
CAUTION
Pulling down rocker arm locknuts tight will cause
valves to hit pistons when making valve clearance
adjustments, resulting in possible damage to
components.
Adjusting Valve Lash
4-100
