Bell and Gossett e-80SC Series, Instruction Manual

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Gap
Figure 17: Top view
For pump sizes 10x10X13.5, 12x12x13 and 14x14x14:
1. Ensure the coupler halves are clean and burr free. Use sand paper to remove any burrs
and sharp edges with the keyways, set screw collar groove and pump shaft split ring
groove. The collar, split ring and keys must slide within their grooves without
interference.
2. If removed, install the set screw collar ring on the motor shaft according to the
instructions above.
3. Upon disassembly, the impeller and pump shaft weight cause the rotor to move
downward and rest at the bottom of the volute.
4. After the seal is pre-assembled onto the pump according the section above, assemble
the split ring in the pump shaft.
5. Install the keys in the motor and pump shafts and turn the motor shaft until the keys
line up.
6. Place the coupler half with the key ways on the motor setscrew collar and on both keys.
Use a crow bar on the pump shaft split ring to lift the impeller and shaft until the split
ring groove is in line with the groove in the coupling.
7. Place the other half of the coupler around the shaft.
8. Insert the coupler cap screws and place a lock washer and nut on each screw. The bolt
heads at each level on opposite sides of the coupling should face in different
directions for balance as shown in the
Figure 17: Top view on page 25.
9. Tighten all of the bolts evenly to avoid mis-alignment. Then rotate the shaft by hand
and make sure the gap on both sides of the coupler is approximately equal. Make sure
the gap from the top to the bottom of the coupler is even. If the gap is not equal,
loosen the bolts and repeat the tightening step.
10.Slowly rotate the shaft by hand and check to see if any rubs occur.
a. If no rubs occur, prime and start the pump run for two minutes and determine if the
pump run smooth and vibration free.
b. If problems occur, check the installation and repeat as necessary.
6 Maintenance
Series e-80SC INSTRUCTION MANUAL 25