Gorman-Rupp Pumps T6A71S-B /F,/FM - Manual (Page 32)

OM-05351 SUPER T SERIES
MAINTENANCE & REPAIR PAGE E - 10
hot plate may be used to heat the bearings. Bear­
ings should never be heated with a direct flame or
directly on a hot plate.
NOTE
If a hot oil bath is used to heat the bearings, both the
oil and the container must be absolutely clean. If
the oil has been previously used, it must be thor­
oughly filtered.
Heat the bearings to a uniform temperature no
higher than 250
_
F (120
_
C), and slide the bearings
onto the shaft, one at a time, until they are fully
seated. This should be done quickly, in one con­
tinuous motion, to prevent the bearings from cool­
ing and sticking on the shaft.
After the bearings have been installed and allowed
to cool, check to ensure that they have not moved
away from the shaft shoulders in shrinking. If
movement has occurred, use a suitably sized
sleeve and a press to reposition the bearings
against the shaft shoulders.
If heating the bearings is not practical, use a suit­
ably sized sleeve, and an arbor (or hydraulic) press
to install the bearings on the shaft.
When installing the bearings onto the
shaft, never press or hit against the outer
race, balls, or ball cage. Press only on the
inner race.
Secure the outboard bearing on the shaft with the
bearing snap ring (21).
Slide the shaft and assembled bearings into the
bearing housing until the retaining ring on the out­
board bearing seats against the bearing housing.
When installing the shaft and bearings into
the bearing bore, push against the outer
race. Never hit the balls or ball cage.
Position the outboard oil seal (7A) in the bearing
housing bore with the lip positioned as shown in
Figure 2. Press the oil seal into the housing until the
face is just flush with the machined surface on the
bearing housing. Inspect for and remove any seal­
ant shavings that might be removed from the O.D.
of the oil seal.
Press the oil seal (7) into the bearing cap (19) with
the lip positioned as shown in Figure 2. Replace
the bearing cap gasket (20) and secure the bear­
ing cap with the hardware (17 and 18). Be careful
not to damage the oil seal lip on the shaft keyway.
Lubricate the bearing housing as indicated in LU­
BRICATION.
Seal Installation
(Figures 2 and 5)
Most cleaning solvents are toxic and
flammable. Use them only in a well ven­
tilated area free from excessive heat,
sparks, and flame. Read and follow all
precautions printed on solvent contain­
ers.
Clean the seal cavity and shaft with a cloth soaked
in fresh cleaning solvent. Inspect the stationary
seat bore in the seal plate for dirt, nicks and burrs,
and remove any that exist. The stationary seat bore
must be completely clean before installing the
seal.
A new seal assembly should be installed
any time the old seal is removed from the
pump. Wear patterns on the finished faces
cannot be realigned during reassembly.
Reusing an old seal could result in prema­
ture failure.
The seal is not normally reused because wear pat­
terns on the finished faces cannot be realigned
during reassembly. This could result in premature
failure. If necessary to reuse an old seal in an emer­
gency, carefully wash all metallic parts in fresh
cleaning solvent and allow to dry thoroughly.