Goulds Pumps 7200CB - IOM - Manual (Page 86)

Maintenance
In order to repair worn seats, skin cut them in a lathe while you maintain dimensional
relationships with other surfaces.
• Replace parts if the seats are defective.
Additional parts
Inspect and either repair or replace all other parts, if inspection indicates continued use would
be harmful to satisfactory and safe pump operation.
Inspection must include these items:
• Bearing end covers (109A and 119A)
• Labyrinth seals (332A and 333A)
• Bearing locknut (136)
• Impeller key (178) and coupling key (400)
• Bearing lockwasher (382)
• All nuts, bolts, and screws
Shaft replacement guidelines
Shaft measurement check
Check the bearing fits of the shaft. If any are outside the tolerances shown in the Bearing fits
and tolerances table, then replace the shaft.
Shaft straightness check
Check the shaft straightness. Use "V" blocks or balance rollers to support the shaft on the
bearing fit areas. Replace the shaft if runout exceeds the values in the Shaft and rotor runout
requirements table.
NOTICE:Do not use shaft centers for the runout check as they may have been damaged during
the removal of the bearings or impeller.
Shaft surface check
Check the shaft surface for damage. Replace the shaft if it is damaged beyond reasonable
repair.
Rotor
Allowable runouts of the fully assembled rotor are listed in the Shaft and rotor runout
requirements table.
Table 3: Shaft and rotor runout requirements
Characteristic Requirement
Flexibility factor, L 4 /D 2 >1.9x10 9 mm
(3.0x10 6 in.)
84 Model 7200CB, API Type BB5 Barrel Multistage / ISO 13709 2nd Edition / API 610 11th Edition Installation, Operation, and
Maintenance Manual