Goulds Pumps 3610 - IOM - Manual (Page 73)

Maintenance
b) Chill the new bushing using dry ice or other suitable chilling substance, and install the
bushing into the fit of the case (100) and head (184).
Be prepared to tap the bushing in place with a hardwood block or soft-faced hammer.
WARNING:
Dry ice and other chilling substances can cause physical injury. Contact the supplier for information and
advice for proper handling precautions and procedures.
c) Tack weld the bushing in place at three equidistant places.
Replace the wear rings
The casing wear rings (164) 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).
1. Remove the wear rings:
a) Remove the setscrews.
b) Remove the wear rings from the casing (100) and 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
scratches.
b) Heat the new impeller wear rings to 180°F–200°F (132°C–143°C) 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.
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. Check the casing wear-ring (164) runout and distortion by measuring the bore at each
setscrew location with inside micrometers or vernier calipers.
Machine any distortion in excess of 0.003 in. (0.08 mm) before you trim the new impeller
wear rings (142).
4. Confirm with inside micrometers or vernier calipers the bore of the casing wear rings (164).
Installation, Operation, and Maintenance Manual 71