Bell and Gossett e-80SC Series, Instruction Manual

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Motor frame size Distance
Collar (DC)
in (mm) Set screw size Set screw torque
in-lbs
D200 IEC 3.686 (93.62) .25–28UNF 87
D225 IEC 4.762 (120.95) .313–24UNF 165
D250 IEC 4.762 (120.95) .313–24UNF 165
324TC-326TC 4.375 (111.13) .25–28UNF 87
364TC-365TC 4.875 (123.83) .313–24UNF 165
404TC-405TC 6.25 (158.75) .313–24UNF 165
444TC-445TC 7.50 (190.5) .313–24UNF 165
447TC-449TC 7.50 (190.5) .313–24UNF 165
6.3.3 Assemble the coupler
For all pump sizes, except 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 tapered washer
groove. The collar, tapered washer 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 in Motor collar ring setting on page 21.
3. Upon disassembly, the impeller and pump shaft weight cause the rotor to move
downward and rest at the bottom of the volute. During reassembly, pump shaft and
impeller will be pulled back up into position by the tapered washer acting against the
tapered groove in the coupler.
4. After the seal is pre-assembled onto the pump according the section above, assemble
the tapered washer with cap screw and lock washer on the end of the pump shaft. An
allen wrench can be placed in the hole on the side of the shaft to prevent it from
rotating while tightening the cap screw.
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.
Check that the tapered washer installed on the end of the pump shaft is starting to
engage the taper groove in the coupler half.
7. Place the other half of the coupler around the shaft.
6 Maintenance
Series e-80SC INSTRUCTION MANUAL 23