ITT GOULDS PUMPS i-FRAME 3620, Инструкция по установке, эксплуатации и обслуживанию

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6.5.4.2 Replace the impeller wear rings
The impeller wear rings (142) are held in place by a press fit and three setscrews (320).
1. Remove the impeller wear rings:
a) Remove the setscrews.
b) Remove the wear rings from the impeller (101). Use suitable pry or puller tools to force the
rings from the fits.
You can also machine the rings for removal.
CAUTION:
Excessive machining can damage ring fits and render parts unusable.
2. Install the impeller wear rings:
a) Thoroughly clean the wear-ring seats, and make sure that they are smooth and free of scratch-
es.
b) Heat the new impeller wear rings to 132°C–143°C | 180°F–200°F using a uniform method for
heating, such as an oven, and place them on the impeller (101) wear-ring seats.
WARNING:
Wear insulated gloves when you handle rings. Rings will be hot and can cause physical injury.
320
142
101
142
320
Figure 65: Wear ring replacement
c) Locate, drill, and tap three new setscrew holes equally spaced between the original holes in
each new ring and ring seat area.
d) Install the setscrews (320) and upset threads.
3. Turn the impeller wear ring (142) to size after you mount it on the impeller (101).
6.5 Preassembly inspections
3620 i-FRAME API type BB2 single stage / ISO 13709 2nd Ed/API 11th Ed Installation, Operation, and Maintenance
Manual 89