TM 554920-384-13&P
50
100
GENERAL
INSPECTION
HOUR
HOUR
Appearance. Inspect the general appear-
ance of the equipment, paying particular at-
tention to cleanliness, legibility of identi-
fication markings, and conditions of the
paint. Correct all deficiencies noticed.
C y l i n d e r head, manifold, and muf-
fler. Inspect the cylinder heads, manifolds
and muffler for leaks, loose mounting and
defective gaskets. Tighten loose manifolds
and muffler mounting bolts and nuts. Dur-
ing the first weekly servicing of a new or
reconditioned engine, inspect all the cylin-
der head bolts for tightness. After warming
the engine up to operating temperature,
tighten any loose bolts to 25 to 32 ft.-lb
torque. Replace defective cylinder head and
manifold gaskets.
Valve Mechanism. If the valves are noisy or
loss of power is noticed, inspect the condi-
tion of the valve mechanism.
Remove valve covers and adjust valve lifter
clearance if necessary. The correct clear-
ance for the valve lifters is 0.0080 inch for
the intake valves and 0.0160 inch for the ex-
haust valves. Replace cover gaskets if
defective.
Compression Test. Remove the spark plugs
and test the cylinder compression by turn-
ing the engine ocver serveral times to sta-
bilize gage reading. If the gage reading var-
ies more than 10 pounds between the four
cylinders, inspect the cylinder head bolts for
tightness.
Tighten any loose bolts and retest. If low
compression or a variation in compression
persists the trouble lies with the cylinder
head gasket, valves, or piston rings. Correct
all deficiencies.
Electrical System Magneto. Inspect the ig-
nition magneto for loose mounting bolts and
wiring connections. Correct any deficiencies
notes.
Remove the end cap and inspect the distrib-
utor cap for cracks, and corroded termi-
nals. Examine the breaker point gap. The
correct gap is 0.015 inch at full separation
of points.
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