Goulds Pumps 7200CB - IOM - Manual (Page 90)

Maintenance
c) Chill the new casing wear ring (164, 164A, 164B, 144) using dry ice or other suitable
chilling substance, and install the ring into the fit of the suction cover (182), inboard
suction cover (182A), intermediate cover (150) and discharge cover (150B).
Be prepared to tap the ring 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.
d) Locate, drill, and tap three new setscrew holes equally spaced between the original
holes in each new ring and ring seat area.
e) Install the setscrews (222E) and upset threads.
3. Check the casing wear rings 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.
4. Confirm the bore of the casing wear rings.
5. Turn the impeller wear rings to size after you mount it on the impeller.
88 Model 7200CB, API Type BB5 Barrel Multistage / ISO 13709 2nd Edition / API 610 11th Edition Installation, Operation, and
Maintenance Manual