Gorman-Rupp Pumps 11 1/2A2-B 347543 and up - Manual (Page 30)

OM-00558 10 SERIES
MAINTENANCE & REPAIR PAGE E - 7
Shaft And Bearing Reassembly
And Installation
Clean and inspect the bearings as indicated in
Shaft and Bearing Removal and Disassembly.
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.
To prevent damage during removal from
the shaft, it is recommended that bearings
be cleaned and inspected in place. It is
strongly recommended that the bearings
be replaced any time the shaft and and
bearings are removed.
NOTE
When installing the bearings, be sure to install them
with the offset of the bearings in the direction as
shown in Figure 1 (seals toward the outside of the
bearing cavity).
The bearings may be heated to ease installation.
An induction heater, hot oil bath, electric oven, or
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 against the shaft shoulders. This should be
done quickly, in one continuous motion, to prevent
the bearings from cooling and sticking on the shaft.
Use caution when handling hot bear­
ings to prevent burns.
After the bearings have been installed and allowed
to cool, check to ensure that they have not moved
out of position in shrinking. If movement has oc­
curred, use a suitably sized sleeve and a press to
reposition the bearings.
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.
After installation, pack the bearings by hand with
No. 0 lithium base grease until fully lubricated.
If removed, install the inboard bearing retaining
ring (16) in the groove in the pedestal I.D.
Slide the shaft and assembled bearings into the
pedestal until the inboard bearing is fully seated
against the bearing retaining ring.
When installing the shaft and bearings into
the bearing bore, push against the outer
race. Never hit the balls or ball cage.
Install the same thickness of bearing adjusting
shims (21) as previously removed. Install the out­
board bearing retaining ring (20).
NOTE
Shaft endplay should be between .002 and .010
inch (0,05 to 0 ,25 mm). Add or remove bearing ad­
justing shims to achieve the correct endplay.