6
Clean all metal parts with a solvent. Use a bristle brush (not metal or wire) to remove tightly adhering
deposits. A fiber scraper may be used to remove the gasket and shellac from cas
ing flange. Blow dry with
clean dry compressed air.
CAUTION:
Never use hydrocarbon liquids (oil or solvent) to clean mechanical seal parts
.
Use of oil or solvent
will deteriorate material used on the seal.
Use mild soap solution to clean seal parts. Use only your finger to remove dirt. Rinse with clean
water and dry with mild air stream. Use care not to damage or scratch lapped surfaces.
6-3
Inspection:
Visually inspect parts for damage affecting serviceability. Check o-rings and gaskets for cracks, nicks, or
tears; packing rings for excessive compression, fraying or shredding, and embedded particles. Replace if
defective in any way. Mount shaft between lathe centers and check eccentricity for entire length of the
shaft. Eccentricity should not exceed .002 inches. Bearing surfaces should be smooth; shoulders square
and free of nicks.
Measure OD of impeller hub and ID of pump casing. Compute diametrical clearance (ID minus OD) and
compare with the original pump specifications. Surfaces must be smooth and concentric. Examine
impeller passages for cracks, dents or embedded material. Examine shaft sleeves for wear
6-4
Assembly:
Assembly is the reverse of the disassembly procedure. The following should prove helpful in
reassembling the pump:
1.
All parts, inside and out, should be clean. Dirt and grit will cause excessive wear, plus needless
shutdown.
2.
Make certain that the keys are in their proper position.
3.
Rotate by hand to insure that the parts do not bind.
4.
Use sealant between the shaft sleeve and shaf
t whenever the sleeve has been removed.
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