Flowserve IJ, Installation Operation & Maintenance

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IJ PUMP OPERATION AND MAINTENANCE MANUAL
BO2660-01 6-24
CAUTION
Striking or cutting into parent metal of stationary part will
make replacement necessary.
1. Machine off, or using rotary file grind off, welds that retain keys to metal of parent part or
drill out setscrews, whichever is applicable.
2. Press out or using aluminum drift (or equivalent), knockout
wearing ring.
3. See that requirements under VISUAL INSPECTION above which apply to wearing rings are
complied with for new ring.
4. See that temperature of parent part is above 70°F (21°C).
CAUTION
Do not bind or otherwise cause undue stress on wearing ring.
5. Sub-cool new wearing ring in Dry Ice to shrink it; then, bottom ring squarely in bore of
parent part by using aluminum drift and mallet to strike evenly around circumference of
wearing ring.
6. Determine that wearing ring and parent part have warmed to ambient temperature by feeling
with hand.
7. If the replacement wearing ring has not been furnished with finish stock left on the running
surface, then verify trueness of wearing-ring-to-part fit as outlined below or by an equivalent
technique :
a. Set part face down on table of vertical lathe and parallel with face of table.
b. Align centerline of part with centerline of table using register face of part as true side of
dial indicator; alignment shall be within limit given in OPERATING SPECIFICATIONS.
c. Clamp around part to hold it in centered and parallel position.
d. Set up dial indicator to run on inside diameter of wearing ring and rotate table; total
runout shall not exceed maximum given in OPERATING SPECIFICATIONS.
8. Install new keys and tack weld them to metal of parent part using gas-tungsten arc and
appropriate wire. Note: some installations use interference fit only to secure ring. Then repeat
step 7.
9. If the replacement wearing ring has been furnished with finish stock left on the running
surface, true cut the wearing ring using the following procedure, or an equivalent:
a. Center the parent part on a vertical lathe by following steps 7.a. through 7.c. above.
b. Machine the finish stock from the inside diameter of the wearing ring to meet the
clearances specified in OPERATING SPECIFICATIONS.
10. Verify trueness of wearing-ring-to-part fit as outlined in step 7. above .
11. See that there is no damage to the wearing surface.
6.5.2.6.8 Replacing Bushings
These instructions apply to the replacement of bushings in intermediate covers or volutes. Unless the
impeller hub wearing surface has been, or is to be, ground down (see RENEWING IMPELLER