Goulds Pumps HS - IOM - Manual (Page 23)

INSTALLING A BEARING
Long bearing life is quite dependent on careful
handling of the bearing when it is out of the housing
and during the installation procedure. Dirt and rough
handling are prime enemies of precision bearings.
Bearings should be pressed, not “hammered” into
place. If heat is used to facilitate the installation, a hot
oil bath is the best method. Bearings for grease
lubrication should be hand-packed with grease to
insure adequate lubrication at startup.
NORMAL BEARING TEMPERATURE
The running temperature for a bearing assembly
depends on many factors such as speed, bearing loads,
ambient air temperature, and condition of bearings.
Temperatures higher than the human hand can tolerate
are very satisfactory for good bearing operation and
should not cause any alarm. For a given speed and loading, the bearing housing
temperature will stabilize at some temperature, usually
below 200°F., which will be the normal temperature
for that installation. Higher temperatures than this
normal temperature, without any change in speed or
loading, can mean a lubrication difficulty or the
approach of a bearing failure.
TO DISASSEMBLE THE BEARING ASSEMBLY
1. Disassemble the liquid end in accordance with the
instructions for that section.
2. Remove the cap screws which fasten the retainers (109
and 119B) to the bearing housing and pull the retainers
off the shaft. Retainer (119B) will push the slinger
(9905) off the shaft with it.
3. Remove the shaft (122) from the bearing frame
(134C).
4. Press the bearings off the shaft by pushing against the
inner race.
TO ASSEMBLE THE BEARING ASSEMBLY
1. See Fig. W15.
2. Press the bearings on the shaft. Make sure the thrust
bearing (112C) is properly orientated. The thrust side
of the outer race must face the retainer.
3. Carefully slide the shaft (122) with bearings into the
bearing frame (134C).
4. Slide the thrust bearing retainer (119B) into position
and secure with cap screws.
5. Slide the radial bearing retainer (109) into position.
Make sure the thrust bearing is pushed against the
other retainer and measure the gap between the
retainer (109) and the housing. See note "N."
6. Remove the retainer and install the necessary shims to
give a thickness .005” - .008” greater than the
measured gap. This will keep the retainers from
axially preloading the thrust bearing against the radial
bearing. Secure the retainer with cap screws.
7. Slide the slinger (9905) into position close to the
retainer, but with sufficient gap to prevent it from
rubbing.
HS IOM 5/08
17
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