Goulds Pumps VIC - IOM - Manual (Page 55)

7. Continue with disassembly down to the bowls as described in the next section.
Bowl disassembly
The bowl assembly is composed of these parts:
• Suction bell
• Intermediate bowls
• Top bowl
• Impellers and securing hardware
• Bearings
• Pump shaft
Turbine bowl impellers are secured to the shaft by either a taper collet or a key and split-thrust ring. Follow
only the procedures that apply to your particular construction. These types of impeller attachments can
apply to any vertical pump less than 18 in. (46 cm) in diameter.
NOTICE:
Mark the components in sequence in order to aid the reassembly.
Disassemble the taper collet bowl
1. Remove the capscrews that secure the top bowl to the intermediate bowl.
2. Slide the top bowl off the pump shaft.
3. Pull the shaft out as far as possible and strike the impeller hub using a collet driver or equivalent,
sliding along the pump shaft to drive the impeller off the taper collet.
4. After the impeller is freed, insert a screwdriver into the slot in the taper collet, spread it, and remove
the taper collet.
5. Slide the impeller off the pump shaft.
6. Repeat these steps until the bowl assembly is completely disassembled.
Disassemble the keyed bowl
1. Remove the capscrews that secure the top bowl to the intermediate bowl.
2. Slide the top bowl off the pump shaft.
3. Remove the capscrews and the split-thrust ring from the pump shaft.
4. Slide the impeller off the pump shaft and remove the key.
NOTICE:
If the impeller is seized to the shaft, then strike the impeller with a fiber mallet and drive the impeller
off the pump shaft.
5. Repeat these steps until the bowl assembly is completely disassembled.
Remove the turbine bowl and impeller wear rings
1. Remove the setscrews or grind off the tack weld if the rings are furnished with those locking methods.
2. Use a diamond-point chisel in order to cut two V-shaped grooves on the bowl or impeller wear ring
approximately 180° apart.
Use extreme care not to damage the wear ring seat.
3. With a chisel or drift punch, knock the end of one half of the ring in, and pry the ring out.
4. On high-alloy materials such as chrome steel, set up the bowl or the impeller in a lathe and machine
the wear ring off, using extreme care not to machine or damage the ring seat.
Remove the bowl, suction bell, and lineshaft bearings
NOTICE:
Bowl bearings are press fit. Do not remove the bowl bearings unless replacement is necessary.
1. Press the bearing off.
Maintenance (Continued)
Model VIC Installation, Operation, and Maintenance 53