Xylem Bell & Gossett e-80SCXL Series, Instruction Manual

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Frame Motor frame size
Distance collar
(DC)
in (mm)
Set screw size
Set screw size
in-lbs
280S/M 4.744 (120.50)
315S/M/L 5.906 (150)
355 7.480 (190)
NEMA
364TC-326TC 4.995 (126.873)
0.313–24UNF
404TC-405TC 6.375 (161.925)
444TC-449TC 7.625 (193.675)
509LLC 6.395 (162.43)
5011LLC 6.395 (162.43)
6.3.3 Assemble the coupler
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 24.
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.
5
3
6
4
7
1
2
a. Set screw collar ring
b. Motor shaft
c. Tapered washer
d. Pump shaft with attached impeller (not shown)
e. Taper washer cap screw and lock washer
6 Maintenance
Series e-80SCXL INSTRUCTION MANUAL 25