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Page Title: IMPELLER HOUSING - lNSPECT/REPLACE (Cont)
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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. GO TO NEXT PAGE 2-90

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