Mechanical seal
The mechanical seal was adjusted at the factory. If
the seal leaks slightly when pump is first started, a few
Some units do not require doweling since lock washers are furnished which hold the pump and driver
feet securely in place.
On other units, the pump and driver feet should be doweled after installation is, completed, and the unit
is in correct final alignment. Taper dowel pins, included in the box of fittings, are furnished for these units.
NOTICE:
on all multi-stage units, dowel pins (if supplied) should be used on the coupling end of pump
only. do not dowel feet on outboard end of pump.
On units to be doweled (except those noted above), drill through two diagonally opposite feet of the
pump into the bedplate. Use a reamer with a ¼" per foot
taper. The dowels should extend well into the bedplate but project above the pump feet. Drivers should
also be doweled but the driver manufacturer should be contacted for instructions.
4.5 Alignment - final
Final adjustment can only be accomplished after the unit has been run under actual operating conditions
for a sufficient length of time to bring the unit up to operating temperature.
After this warm-up period has elapsed, stop the unit and immediately disconnect the coupling and check
the alignment. On
Back-Pull Out end suction units, the frame foot
should be loosened to relieve any strain due to thermal
expansion. On units which have jacking bolts on the foot, loosen the hold-down bolts. On units which
have a slotted hole on the foot near the bearing frame, loosen the foot-to-bearing frame bolt. Make sure
motor switch is locked out to prevent accidental rotation. After a minute or two, re-tighten foot bolts.
Repeat each alignment procedure outlined in
2.6 Alignment procedures on page 13
Reconnect coupling.
Check final alignment after approximately one week of operation.
4.6 Doweling
Some units do not require doweling since lock washers are furnished which hold the pump and driver
feet securely in place.
On other units, the pump and driver feet should be doweled after installation is completed, and the unit is
correct final alignment. Taper dowel pins, included in the box of fittings, are furnished for these units.
NOTICE:
On all multi-stage units, dowel pins (if supplied) should be used on the coupling end of pump
only. Do not dowel feet on outboard end of pump.
4.5 Alignment - final
32
3107 Installation, Operation and Maintenance Instructions
