Goulds Pumps 3180-86 - IOM - Manual (Page 89)

Assembled rotating element:
4. Prepare the bearing frame for either grease or oil lubrication.
If your bearing frame is... Then...
Oil lubricated
Make sure that the oil return is fully open (no plug).
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1
1. Oil return
Maintenance
Models 3180, 3181, 3185, and 3186 Installation, Operation, and Maintenance Manual 87