Goulds Pumps 3640 - IOM - Manual (Page 70)

Maintenance
Gaskets, O-rings, and seats replacement
WARNING:
Avoid death or serious injury. Leaking fluid can cause fire and/or burns. Replace any damaged or worn
gaskets/o-rings.
• 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.
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 360A)
• Labyrinth seals (332A and 333A)
• Bearing locknut (136)
• Impeller key (178) and coupling key (400)
• Bearing lockwasher (382)
• Water jacket cover (490), if supplied
• 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
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.
68 Model 3640 Installation, Operation, and Maintenance Manual