Goulds Pumps API 3171 - IOM - Manual (Page 49)

6. Slide the bearing shell (134) off the bearing and shaft.
7. Remove the locknut (136) and the lockwasher (382).
8. Use a suitable bearing puller in order to remove the bearing (112).
Make sure to save the bearing for inspection.
9. Set the shaft on a table where it is adequately supported.
You do not need to disassemble the pump any further unless you need to replace bad parts.
Preassembly inspections
Replacement guidelines
Casing check and replacement
Inspect the casing for cracks and excessive wear or pitting. Thoroughly clean gasket surfaces and alignment
fits in order to remove rust and debris.
Repair or replace the casing if you notice any of these conditions:
• Localized wear or grooving that is greater than 1/8 in. (3.2 mm) deep
• Pitting that is greater than 1/8 in. (3.2 mm) deep
197
100
155
100 Casing
155 Casing collar
197 Steady bearing
• Check the I.D. of the casing collar (155) and steady bearing (197) per the dimensions in Bearing fits and
tolerances (page 49). If the I.D. is greater than what is allowed, remove the snap ring (369) and use a
suitable hydraulic press to remove these items for replacement. If sealed bearings have been provided,
you must also remove the lip seals (333H).
• Inspect the casing-to-column connection area for any cracks or excessive corrosion damage. Replace
if any of these conditions exist.
• Irregularities in the casing-gasket seat surface
Impeller replacement
This table shows the criteria for replacing the impeller:
Impeller parts When to replace
Impeller vanes • When grooved deeper than 1/16 in. (1.6 mm),
or
• When worn evenly more than 1/32 in. (0.8 mm)
Maintenance
Model API 3171 Installation, Operation, and Maintenance Manual 47