Goulds Pumps 3700 Installation, Operation And Maintenance Manual page 75

CAUTION:
• Excessive machining can damage ring fits and render parts unusable.
• Wear insulated gloves when you handle rings. Rings will be hot and can cause physical injury.
• For runout checks, firmly support the bearing-frame assembly in the horizontal position.
• Wear heavy work gloves when you handle impellers. The sharp edges can cause physical injury.
NOTICE:
The impeller and wear-ring clearance setting procedures must be followed. Improperly setting
the clearance or not following any of the proper procedures can result in sparks, unexpected
heat generation, and equipment damage.
Casing, impeller, and seal chamber cover wear rings are held in place by a press fit and three
set screws.
1. Remove the wear rings:
a) Remove the set screws.
b) Remove the wear rings from the casing, impeller, and seal-chamber cover using a pry
2. Clean the wear-ring seats thoroughly, and make sure that they are smooth and free of
scratches.
3. Heat the new impeller wear rings to 180° to 200°F (82° to 93°C) using a uniform method for
heating, such as an oven, and place them on the impeller wear-ring seats.
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202
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320
4. Chill the new casing wear ring using dry ice or another suitable chilling substance and
install the ring into the casing fit.
Model 3700, API Type OH2 / ISO 13709 1st and 2nd Ed. / API 610 8/9/10/11th Ed. Installation, Operation, and Maintenance
Manual
or puller to force the rings from the fits.
Impeller
Impeller wear ring
Impeller wear ring
Set screw
Maintenance
73