Goulds Pumps 3393 - IOM - Manual (Page 79)

Maintenance
Impeller checks
• Check and clean the impeller bore diameter.
• Check the impeller balance. Rebalance the impeller if it exceeds the ISO G 6.3 criteria.
NOTICE:
You must have accurate tooling equipment to balance impellers to the ISO G 6.3 criteria.
Do not attempt to balance impellers to this criteria unless this type of tooling and equipment is
available.
Impeller areas to inspect
A. Shroud
B. Wear Ring (if supplied)
C. Vane
Balance drum areas to inspect
Balance drum surfaces must be smooth and free of grooves and scratches, especially in the
areas indicated by arrows in the figure. Also check the outside diameter of the balance drum.
Model 3393 Installation, Operation, and Maintenance Manual 77