Intake valve clearance .010 in.
Exhaust valve clearance .020 in.
Valve adjustment may only be
done on cool engine (140F)
The clearance is correct when
some resistance is felt when
the feeler gauge is placed
between the valve stem and the
(11) Tighten tappet adjustment screw (6) until
proper clearance is obtained.
(12) While keeping tappet adjustment screw (6)
at the correct clearance tighten jamnut (5) to
18 lb-ft (24 N.m).
If more than one rocker arm is
replaced, repeat Steps (4) through
The engine crankshaft must be
rotated 360 for each rocker arm
(13) Install gasket (3), rocker arm cover (2) and
screw (1) on cylinder head (4). Tighten
screw to 18 lb-ft (24 N.m).
Install rear panel, (TM 9-4940-568-10).
Start generator and listen for unusual noise and leaks, (TM 9-4940-568-10).
Connect batteries, (TM 9-4940-568-10).
END OF TASK