Goulds Pumps 3700 Installation, Operation And Maintenance Manual page 78

Maintenance
NOTICE:
You must have extremely accurate tooling equipment to balance impellers to the ISO 1940
G1.0 criteria. Do not attempt to balance impellers to this criteria unless this type of tooling
and equipment is available.
Impeller areas to inspect
101
202 and 203
Figure 52: Areas to inspect for wear on impeller
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.
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:
Risk of death or serious injury. Leaking fluid can cause fire and/or burns. Replace all gaskets
and O-rings at each overhaul or disassembly.
• 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 the following items:
• Bearing end covers (109A) and (119A)
• INPRO radial deflector (123) and thrust deflector (123A)
76 Model 3700, API Type OH2 / ISO 13709 1st and 2nd Ed. / API 610 8/9/10/11th Ed. Installation, Operation, and Maintenance
Impeller
Impeller wear rings
Manual