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TM 55-2915-335-30&P
2-24. IMPELLER HOUSING - lNSPECT/REPLACE (Cont)
2-24
3. INSPECTION
a.
b.
c.
d.
Run your finger along the packing grooves in the
impeller housing. Feel for any sharp edges, nicks,
or scratches that may damage preformed packings.
Remove sharp edges, nicks, or scratches, using 500
or 600 grit, wet or dry emery paper. After sanding,
clean surface with a cloth moistened with dry
cleaning solvent.
If edge of packing groove is broken off, replace
impeller housing.
Using a flashlight, visually inspect pump cover and
inlet seal packing seats, surfaces A and B, for
nicks, burrs, or scratches. If a defect is found on
either sealing surface,
it must be completely
removed flush with the surrounding surface as
follows:
(1)
(2)
(3)
Use 500 or 600 grit, wet or dry emery paper
moistened with water. Polish the bore
diameter until the sharp edges and the entire
raised portion of defect is removed.
Lightly run your finger along the entire bore
area of surfaces A and B and make sure you
do not feel any defects. After you are
satisfied with the finish, use a clean cloth
moistened in cleaning solvent to clean the in-
side of the bore.
Use a flashlight to check the reflected surface
to make sure the raised portion of the defect
is removed.
Check each of the three fluid ports on motor end
of housing for blockage. Clear any blockage found
with wire probe, 0.035 inch (0,89 mm) diameter
maximum. If fluid port blockage cannot be
removed, replace impeller housing.
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