6.5.5.1 Replace the wear rings
WARNING:
Dry ice and other chilling substances can cause physical injury. Contact the supplier for infor-
mation and advice for proper handling precautions and procedures.
(Not applicable for 3700LF/3700LFI)
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 impel-
lers.
NOTICE:
The impeller and wear-ring clearance setting procedures must be followed. Improp-
erly 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 or puller
to force the rings from the fits.
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 82° to 93°C | 180° to 200°F using a uniform method for heating,
such as an oven, and place them on the impeller wear-ring seats.
6.5 Preassembly inspections
84
Model 3700, 3703, 3710, 3700LF, 3700LFI API Type OH2 / ISO 13709 1st and 2nd Ed. / API 610 8/9/10/11th Ed. Instal-
lation, Operation, and Maintenance Manual
Summary of Contents for Goulds Pumps 3700
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