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Figure 3-75.Cylinder head prepared for pressured test.
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TM-10-3930-634-34 Truck Lift Fork; Diesel Engine Pneumatic Tired Wheels Rough Terrain 6 000 Lb. Capacity 24 Load Center Anthony Model MIT 6-2 Manual
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Figure3-80. Exhaust valve guide installation
TM 10-3930-634-34
ing solvent (Fed Spec P-D-680) and dry thoroughly
tly and drive the guide into the cylinder head as il-
with compressed air.
lustrated in figure 3-80.
(b) Inspect the counterbores for cleanliness, con-
CAUTION
centricity, flatness and cracks.
Do not use the valve guides as a means of
(c) Immerse the cylinder head for at least 30
turning the cylinder head over or handling
minutes in water heated to 180 F. to 200 F.
the cylinder head.
(d) Rest the cylinder head, bottom side up, on a
(4) Exhaust valves.
work bench and locate the insert squarely in the coun-
(a) An exhaust valve which is to be reused may
terbore seat, face up. Install the insert in the cylinder
be refaced, if necessary; to provide sufficient valve
strength and spring tension the edge of the valve must
while the head is still hot and the insert is at room
not be less than 1/32 inch thick.
temperature. Drive the insert into place with install-
ing tool as illustrated in figure 3-79.
(b) Before either a new or used valve is in-
(3) Exhaust valve guide. Turn the cylinder head
stalled, inspect the valve seat in the cylinder head for
right side up and install the exhaust valve guides as
proper valve seating. The proper angle for the seating
follows:
face for both valve and seat insert is 30.
(c) When a new valve seat insert is installed or
(a) Install the threaded end of valve guide in the
proper guide installation tool.
(b) Position the valve guide squarely in the bore
of the cylinder head and tap the installation tool gen-

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