Goulds Pumps 3355 - IOM - Manual (Page 40)

Maintenance
NOTICE:Never re-use shaft nuts (136A).
9. Remove the ball bearings (409) with the bearing puller.
10. Check the shaft surface for damage. Grind away any furrows.
Disassemble the pump body
1. Loosen the nuts (357F) and remove the tie rod (356S).
2. Remove the suction casing (100F) and remove the O-ring (412K).
3. Loosen the impeller nuts (304) and remove the washer (199).
4. Dismantle the impeller (101) and diffuser (150) and then remove the impeller key (178).
Mark all parts for reassembly.
5. Remove the intermediate bearing housing (134C) and bearing sleeve (310).
6. Dismantle the pump in stages down to the discharge casing.
7. Invert the remaining portion of the pump.
Note that the bearing bracket (228C) faces up.
Disassemble the suction end ball bearings
1. Remove the heat flinger guards (499) if applicable.
2. Place the pump in a horizontal position and then raise the suction casing (100F) with
wooden blocks so that the feet of the bearing bracket (228C) are exposed by approximately
0.50 in. (1.27 cm).
3. Move back the thrower (248) or heat flinger (123B) if applicable.
4. Unscrew the nuts (425 and 427H) and then pull the bearing cover (119) off the bearing
bracket (228C).
5. Remove the bearing bracket (228C) by tapping the bearing flange lightly in an axial
direction.
6. Unscrew the shaft nut (136A) with a spanner wrench. The shaft nut has a securing device
that prevents it from becoming loose.
NOTICE:Never re-use the shaft nut (136A).
7. Remove the ball bearings (112) with the bearing puller.
8. Check the shaft surface for damage. Grind away any burs.
Remove the shaft seal
1. Remove the roller bearings (112) with a gear puller.
2. Remove bearing cover (119), spacer sleeve (157) and thrower (248) or heat flinger (123B)
if applicable.
3. Remove shaft sleeve key (401).
4. Remove seal cover (184). Pre-treat fitting surface between the seal cover and the casing
with compatible lubricant.
5. Slide off shaft sleeve (104 and 126) and pull out O-ring (412F).
6. Press out the seat ring of the mechanical seal (383 and 383S) from the seal cover (184)
using even pressure.
7. Slide the rotating unit of the mechanical seal off the shaft sleeve (104 & 126). If the
mechanical seal has set screws these must first be removed.
8. Clean and check all parts for wear. Mechanical seals must always be replaced.
38 Model 3355 Installation, Operation, and Maintenance Manual