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 TM 55-1905-221-14-2
5-15. CYLINDER HEAD (Continued).
LOCATION/ITEM
ACTION
REMARKS
REPAIR/REPLACEMENT (Cont)I
s. When a valve seat insert
runout within the desired
limits is obtained, determine
the position of the contact
area between the valve and
the valve seat insert in
the following manner:
1.
Apply a light coat of
Prussian blue, or a
similar paste, to the
valve seat insert.
2.
Lower the stem of the
valve in the valve guide
and bounce, but do not
rotate the valve on the
insert. This procedure
will indicate the area of
contact on the valve face.
The most desirable area
of contact is at the
center of the valve face.
t.
Dress the grinding wheel to
obtain the proper seat angle.
After the valve seat inserts
have been ground and inspected,
clean the cylinder head
thoroughly before installing
the valves.
u. Install valves (6) as follows:
1.
Clean the valve guides (7).
2.
Lubricate the valve stems
and slide the valves (6)
all the way into the guides.
NOTE
If reconditioned valves are used, install them in the same relative location from which they were removed.
5-372
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