Goulds Pumps 3298 - IOM - Manual (Page 67)

Maintenance
NOTICE:
• Use caution when you use an hydraulic press because you cannot feel when the bearing
hits the bottom of the bore.
• Do not hammer the magnet assembly onto the shaft. This will damage the ball bearings.
• Pressing the radial bearings into the impeller can cause some ETFE to peel. If this occurs,
press out the bearings, remove any ETFE filings, and then press the bearings back into
the impeller.
• There are several methods you can use to install bearings. The recommended method is
to use an induction heater that heats and demagnetizes the bearings.
• You may need to lightly press the shaft with bearings into the bearing frame. It is important
that you press the bearings in by putting a sleeve on the inner race of the outboard ball
bearing.
• Make sure that the shaft O-ring, grooves, shaft keyways, and keyway in the frame are free
of burrs.
Since the bolt pattern for the bearing end cover (109A) is not symmetric, the bearing end cover
gasket (360A) and bearing end cover (109A) can only go on one way. This ensures that the oil
return slot will always be down.
Reassemble the rotary assembly
1. For the L group, complete these steps:
a) Install the O-ring (496G) into the driven magnet assembly (740A).
b) Lubricate the O-ring (496G) with Parker O-ring lube or an equivalent lube.
c) Press the driven magnet assembly (740A) onto the impeller assembly (101).
d) Install the retaining ring (361H) into the groove of the impeller assembly (101).
Figure 36: 3298 L group impeller
2. For all groups except XS, install the key:
a) Slide key (178S) into impeller (101).
3298 Family Installation, Operation, and Maintenance Manual 65