Goulds Pumps 3393 - IOM - Manual (Page 90)

Maintenance
9. Install the seal guard (499). These are not shown but cover the openings in the bearing
frame.
Assembly of the balance drum rotor and stator - end and radial suction
pumps
NOTICE:Take care not to damage the shaft (122) during reassembly.
1. Replace balance drum stator (300A) and balance drum stator o-ring (496U).
2. Replace balance drum rotor (300) and balance drum rotor o-ring (4112X). Balance drum
rotor must be rotated approximately 30º to lock it into place. Use the alignment marks
placed during disassembly as a guide.
3. Insert balance drum locking plate key (178R) in shaft and slide balance drum locking plate
(519) over key and secure it to balance drum with capscrews (372H).
4. Replace seal chamber (184) by inserting the lip on the flat surface of the seal chamber into
the positioning groove in the balance drum stator.
5. Replace mechanical seal and gland as noted in instructions for assembly of mechanical
seal.
6. Replace thrust end bearing housing as noted in instructions for assembly of thrust bearing
(item 409).
88 Model 3393 Installation, Operation, and Maintenance Manual