Goulds Pumps 3500XD - IOM - Manual (Page 40)

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3500XD IOM 8/07
REASSEMBLY OF PUMP
l
! CAUTION
Wear insulated gloves when using a bearing heater.
Bearings will get hot and can cause physical injury.
This procedure covers reassembly of the pump after complete
disassembly. Be sure all directions in the Inspection and
Overhaul section have been followed.
NOTE: There are several methods used to install
bearings. The recommended method is to use an
induction heater that heats as well as demagnetizes the
bearings.
Installation of Thrust Bearings
The Model 3500XD utilizes a thrust bearing on the coupling
end of the shaft designed for high unidirectional thrust loads.
It is thus critical that the thrust bearing be installed in the
proper orientation. The “S” and “L” group pumps utilize a
four point contact bearing paired with a standard angular
contact bearing. The “M” group pump utilizes a Pumpac pair
of bearings. Refer to bearing chart in Figure 20 for detailed
bearing designations.
Both types of thrust bearings consist of a matched pair of
bearings with an arrow scribed on the outer races (see
Figures 22 & 23). The arrow must point in the direction of
axial thrust (i.e. towards the coupling end of the shaft). An
arrow attached to the top of the bearing frame (Figures 22 &
23) shows the correct thrust direction.
Fig. 22
Model 3500XD
M Group
Fig. 23
Model 3500XD
S and L Groups