Goulds Pumps 3180-86 - IOM - Manual (Page 88)

a) Use an induction bearing heater in order to heat the bearings to approximately 250°F (121°C ).
This expands the bearings to ease their installation on the shaft.
b) Install the radial bearing (409) onto the shaft (122). For the S, M, L, and XL groups, make sure
that the spacer ring is placed between the shaft shoulder and inner race.
Care must be taken to keep the inner race together with the roller assembly during installation.
c) Place the thrust-bearing retainer ring (253B) on the shaft between the bearing fits with a small
diameter-facing coupling end.
d) Determine the orientation of the angular contact thrust bearings (112) for back-to-back mounting.
This is with the thick shoulders of the outer races together.
e) Slide the angular contact duplex bearings (112) onto the shaft while you maintain the correct
orientation.
f) Push the inner races firmly together against the shoulders until they cool and lock into place.
g) After the bearings have cooled, place the lockwasher (382) on the shaft and install the bearing
locknut (136).
h) Tighten the bearing locknut firmly with a spanner wrench while you clamp the bearing set against
the shaft shoulder.
i) Bend the tang of lockwasher into a slot on the bearing locknut.
1
409
122
253B
112
382
136
1. Spacing ring.
2. If the frame is grease lubricated, hand pack all three bearings with grease.
3. Lubricate and install the O-ring (496) on the thrust bearing housing (134A):
a) Slide the thrust bearing housing over the bearings.
b) Attach the thrust-bearing retaining ring (253B) to the thrust bearing housing with socket head
capscrews (236A).
Tighten firmly in a crossing sequence in order to make sure there is even contact with the bearing
races. See Maximum torque values for fasteners.
For the S, M, L, and XL groups: For the XL1, XL2-S, and XL2 groups:
There will be a gap of approximately 0.12 to
0.16 in. (3.05 to 4.06 mm) between the retaining
ring and bearing housing.
There will be a gap of approximately 0.16 to
0.21 in. (4.06 to 5.33 mm) between the retaining
ring and bearing housing.
Maintenance
86 Models 3180, 3181, 3185, and 3186 Installation, Operation, and Maintenance Manual