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TM 55-2915-335-30&P
2-14. INLET SHUTOFF VALVE - lNSPECT/REPLACE (Cont)
2-14
3. INSPECTION
a.
b.
c.
d.
e.
f.
g.
Place valve stem in a combination square as
shown. Visually check that stem is at an ap-
proximate 90° angle with valve arm. If valve stem
is not parallel with arm of square, replace valve
stem assembly.
Check valve arm. If valve arm is bent, straighten it.
Visually inspect valve seal surface C for scratches
or burrs. If sharp edges cannot be removed from
scratches or burrs using 500 or 600 grit, wet or dry
emery paper, replace pump housing.
Visually check valve stem for crossed, stripped, or
flattened threads. If damaged, replace valve stem.
Check rubber seal disk, surface D, for cracks, glaz-
ing, or uneven surface. A glazed surface is hard
and shiny. If surface D is cracked, uneven, or
glazed, replace seal disk assembly.
Check bond between rubber seal disk and back-
plate. If seal disk is separated from backplate, re-
place seal disk assembly.
Using a flashlight visually check packing groove in
valve stem bore for any appearance of nicks or
damage. If packing groove is damaged, replace
housing.
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