Goulds Pumps 3640 - IOM - Manual (Page 69)

Maintenance
Impeller areas to inspect
A. Shroud
B. Wear ring
C. Vane
Oil ring replacement
Oil rings must be as round as possible in order to function properly. Replace oil rings if they are
worn, distorted, or damaged beyond reasonable repair.
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.
Model 3640 Installation, Operation, and Maintenance Manual 67