Goulds Pumps 3393 - IOM - Manual (Page 70)

Maintenance
Radial suction pump
See relevant sectional drawing.
To dismantle the whole pump for maintenance work, place it in a vertical position with the
suction nozzle facing upwards. It is important that the pump is secured and stable and
supported without damaging the bearing housing. A workbench with a hole approximately 1/2”
larger than the shaft is helpful in such cases. A hoist or a second person is required for a safe
disassembly.
WARNING:
Make sure that the unit cannot roll or fall over and injure people or damage property.
1. Unscrew nuts (425) and back off the bearing bracket (228C) using the jacking screw (418).
2. 2. Unscrew cap screws (371C) and confirm that the bearing housing cover (119) is free to
move.
3. Remove bearing housing (228C)
4. Remove the bearing housing cover o-ring (412). Do not reuse the o-ring.
5. Bend back the lock washer tab (382) and remove bearing nut (136A) and lock washer
(382).
6. Remove ball bearings (112) with the bearing puller.
7. Remove the mechanical seal and gland as noted in the instructions for removal of the
mechanical seal.
8. Loosen tie rod nuts (357F) and remove tie rods (356J). Note: the tie rods are threaded into
the discharge casing and must be removed by unscrewing the tie rods using the flats
machined into their surface.
9. Remove suction casing (100S) and remove O-ring (412K).
10. Loosen retaining ring set screw ((352F) and remove retaining ring (361H) and split ring
(214B).
11. Remove impeller (101), impeller key (178), stage casings (100G) and final stage casing
(100H) along with stage casing o-rings (412K) and discharge casing o-ring (497D). This
must be done stage by stage down to the discharge casing (100D).Do not reuse o-rings.
12. Invert the pump so the discharge side bearing housing (228C) faces upward position.
13. Remove seal guards (499).
14. Remove cooling fan (392) if applicable, by loosening set screw (222V).
15. Disconnect any flush piping from the mechanical seal gland.
68 Model 3393 Installation, Operation, and Maintenance Manual