Gorman-Rupp Pumps 612L20B-B 806819 and up - Manual (Page 31)

60 SERIES OM-01919
MAINTENANCE & REPAIR PAGE E - 12
Under normal conditions, change the oil each
5000 hours of operation, or at twelve month inter­
vals, which ever occurs first. Change the oil more
frequently if the pump is operated continuously or
installed in an environment with rapid temperature
change.
Monitor the condition of the bearing lubri­
cant regularly for evidence of rust or mois­
ture condensation. This is especially im­
portant in areas where variable hot and
cold temperatures are common.
For cold weather operation, consult the factory or a
lubricant supplier for the recommended grade of
oil.