Maintenance
Impeller locknut areas to inspect
Locknut surfaces must be smooth and free of grooves and scratches, especially in the areas
indicated by arrows in the figure. Also check the outside diameter of the locknuts.
Cartridge mechanical seal replacement
Cartridge-type mechanical seals should be serviced by the seal manufacturer. Refer to the
instructions from the mechanical seal manufacturer for assistance.
Coupling guard replacement
Repair or replace the coupling guard if you notice corrosion or other defects.
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)
• 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.
Model 3610, API Type BB1 API 610 11th Edition Installation, Operation, and Maintenance Manual
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