Replace The Wear Parts - ITT 3610 i-FRAME Manual

6.5 Preassembly inspections
• Repair or replace housings as necessary.

6.5.4 Replace the wear parts

6.5.4.1 Replace the throat bushing
1. 1. Remove the throat bushing:
a) Once the rotor is removed, the throat bushing (125) is clearance fit and can be removed by
sliding off of the shaft from the impeller nut (124).
2. Install the throat bushing:
a) Thoroughly clean the bushing fit in the mating components bore.
b) Slide on new throat bushing on shaft over impeller nut (124).
c) Assure wear rings and bushings sit in proper bores when placing the rotor into the casing.
6.5.4.2 Replace the wear rings
The casing wear rings (164) are held in place with a locational fit and anti-rotational pin (445A). Impeller
wear rings (142) are held in place by a press fit and three setscrews (320).
NOTICE:
The impeller and wear-ring clearance setting procedures must be followed. Improperly set-
ting the clearance or not following any of the proper procedures can result in sparks, unexpect-
ed heat generation, and equipment damage.
1. Remove the 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 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.
90 3610 i-FRAME API 610 11th Ed/ISO 13709 2nd Ed, API Type BB1 Single-Stage, Axially-Split, Between-Bearing IOM