Goulds Pumps 3408 - IOM - Manual (Page 38)

36
3408 IOM 03/99
CHANGING ROTATION
3408 centrifugal pumps can be operated clockwise or
counterclockwise when viewed from the coupling end
of the pump. If you wish to reverse the suction and
discharge nozzles; i.e. change rotation, this can be
accomplished with the same pump as follows:
1. Re move the im pel ler from the shaft, turn it 180°
and re place it on the shaft. (Fol low the
dis as sem bly pro ce dures given in this man ual.)
2. With the ro tat ing el e ment out of the cas ing,
re move the cas ing from the baseplate and turn
180°. (Fac tory baseplates are drilled for both
ro ta tions.)
3. Set the ro tat ing el e ment back in the cas ing and
re as sem ble the pump.
NOTE: The impeller and casing are in the same
relationship to each other as they were
originally. The shaft and motor are also in the
same relationship to each other as they were
originally.
4. Reassemble the pump and realign the coupling as
called for in the alignment instructions.
5. The rotation of the motor must be changed by
switching the motor leads.
NOTE: Unless the motor rotation is reversed
the impeller will run backward.
▲
! CAUTION
Check motor fan to make sure it is
bidirectional. If not, motor fan will have to be
turned around or replaced. Failure to do this
could cause motor to run hot.
Fig. 16