Goulds Pumps 3409 - IOM - Manual (Page 54)

LIMITED END FLOAT COUPLINGS
For units with drivers having sleeve bearings, the coupling
halves are set to limit total shaft axial movement to less
than one-half of the motor rotor assembly end float. This is
accomplished by inserting a phenolic disc, or equivalent, of
a specified thickness between the motor and pump shaft.
(See Fig. 40)
Most 3409 pump installations use the all metal, gear type
coupling. Where limited end float gear type couplings are
used, the coupling hubs are slip-fit onto the pump and
motor shafts. After installation of the coupling covers and
hubs; with the motor set on its Magnetic Center, butt the
pump and motor shafts with the phenolic disc inserted
between them. (The pump thrust bearing limits end float
toward the pump, and the coupling covers limit end float
towards the motor.) The thrust bearing of the pump is large
enough to carry any magnetic thrust developed by the
motor when aligned properly.
Once the above instructions have been followed
completely the Alignment Procedures found in the
Installation section should then be followed.
54
3409 IOM 11/04
Fig. 40