Goulds Pumps 3640 - IOM - Manual (Page 78)

Maintenance
Assemble the thrust end (ball bearing pumps)
1. Assemble the inboard labyrinth seal (333A) into the inboard thrust end cover (160):
a) Clean the end cover with a solvent.
b) Fit the labyrinth seal (333A) into the bore of the cover (160).
c) Tap the seal in with a hammer.
NOTICE:
Make sure that the expulsion port is at the 6 o'clock position and is properly seated.
2. Assemble the inboard end cover (160) and the inboard bearing end-cover gasket (360A)
onto the shaft.
3. Assemble the thrust bearings (112A) in a back-to-back arrangement onto the shaft (122):
The bearings are interference fit.
a) Preheat the bearings to 250°F (120°C) with an induction-type bearing heater.
Be sure to also demagnetize the bearings after heating.
CAUTION:
• Wear insulated gloves when you use a bearing heater. Bearings get hot and can cause physical
injury.
NOTICE:
Do not use a torch and do not force.
b) Install the bearings (112A), the oil ring sleeve (443B), and the bearing locknut (136)
onto the shaft.
c) While the bearings are hot, tighten the locknut by hand with a spanner wrench until the
bearing is snug against the shaft shoulder.
d) Allow the bearing assembly to cool slowly to room temperature.
Do not rapidly cool the bearings with compressed air or other means.
e) When the bearing assembly is fully cooled, remove the locknut, install the lockwasher
(382), and install the locknut.
76 Model 3640 Installation, Operation, and Maintenance Manual