Goulds Pumps 3171 - IOM - Manual (Page 45)

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
• Irregularities in the casing-gasket seat surface
Impeller replacement
This table shows the criteria for replacing the impeller parts:
Impeller parts When to replace
Vane edges When you see cracks, pitting, or corrosion damage
Gaskets, O-rings, and seats replacement
• Replace all gaskets and O-rings at each overhaul and disassembly.
• Inspect the seats. They must be smooth and free of physical defects.
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.
Column sections
Inspect the column section(s) (306, 192) for any cracks or excessive corrosion damage. Replace if necessary.
Motor support
Inspect the motor support (240) for any cracks or excessive corrosion damage. Replace if necessary.
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 0.001 in. (0.03 mm).
NOTICE:
Do not use shaft centers for the runout check as they may have been damaged during the removal of the
bearings or impeller.
Maintenance (Continued)
Model 3171 Installation, Operation, and Maintenance Manual 43