TM 5-3805-262-34
3-1. ENGINE MAINTENANCE (CONT)
j. Valves (Cont).
IMSPECTION/REPAIR (SHEET
(8) If necessary,
lows :
5 OF 6)
grind valves (6 and 9) and seat inserts (7 and 10) as fol-
(a)
Using precision seat grinder
on seat inserts (7 and 10),
grind lightly at angle shown.
Take light cuts until just
enough metal is removed to
obtain smooth finish.
NOTE
Replace any valve that has a thin margin or edge. If margin on used or
ground valve is less than half the margin on a new valve, do not grind
that valve. Valve must be replaced.
(b) Using precision seat grinder on valves (6 and 9), grind lightly at angle
shown. Take light cuts on valve face
to obtain smooth finish.
until just enough metal is removed
Prussian blue contains toxic cyanide. Wear
and use only in a well ventilated area.
protective goggles
Avoid contact with
and gloves
skin, eyes
and clothes and don-t breathe vapors. Contact can cause serious injury
or death. If you contact Prussian blue, flush area with large amounts of
water and get medical aid immediately.
(c) Apply small amount of Prussian blue on valve face. Install valve (6 or
9) in cylinder head and valve face on seat insert (7 or 10).
(d) Remove valve (6 or 9) and inspect contact area on valve face. Bluing
will be removed from valve face where contact was made with seat insert.
Refer to illustrations on following pages for correct and incorrect in-
dications as well as remedial procedures.
3-80
