Goulds Pumps 3393 - IOM - Manual (Page 93)

Maintenance
1. Place balance drum stator (300A) and balance drum stator o-ring (496U) in the discharge
casing.
2. Replace balance drum rotor (300) and balance drum rotor o-ring (412X) on the shaft.
Balance drum rotor must be rotated approximately 30 degrees to lock it into place on the
shaft. Use the alignment marks placed during disassembly as a guide. Make sure that shaft
is braced to prevent it from rotating.
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 cap screws (372H).
4. Locate shaft approximately in the center of the discharge casing with the coupling end up.
5. Replace seal chamber (184) by inserting the lip on the flat surface of the seal chamber into
the positioning hole in the balance drum stator.
6. Replace mechanical seal and gland as noted in instructions for assembly of mechanical
seal.
7. Clean and lubricate the fitting surfaces between the bearing housing (228C) and discharge
casing (110D).
8. Position the bearing cover (119) with the bearing isolator (333A) over the shaft.
9. Verify that the bearing spacer (157) is in place against the shaft shoulder.
Model 3393 Installation, Operation, and Maintenance Manual 91