Goulds Pumps 3700 Installation, Operation And Maintenance Manual page 83

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.
• Risk of physical injury from sharp edges. Wear heavy work gloves when handling
impellers.
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.
Item
101
202
203
320
Figure 57: Impeller wear ring
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.
Description
Impeller
Impeller wear ring
Impeller wear ring
Set screw
Maintenance
81