Gorman-Rupp Pumps 11 1/2A3-B 348418 and up - Manual (Page 29)

10 SERIES OM-00565
MAINTENANCE & REPAIR PAGE E - 6
If no further disassembly is required, see Seal
Reassembly and Installation.
Shaft and Bearing Removal and Disassembly
When the pump is properly operated and main­
tained, the pedestal should not require disassem­
bly. Disassemble the shaft and bearings only
when there is evidence of wear or damage.
Shaft and bearing disassembly in the field
is not recommended. These operations
should be performed only in a properly‐
equipped shop by qualified personnel.
Remove the slinger ring (12) and shaft key (19).
Use snap ring pliers to remove the outboard retain­
ing ring (17) and remove the bearing adjusting
shims (18). Tie and tag the shims or measure and
record their thickness for ease of reassembly.
NOTE
There are no provisions for draining the lubricant
from the pedestal. Place a drip pan under the ped­
estal before disassembly.
Place a block of wood against the impeller end of
the shaft and tap the shaft and assembled bear­
ings (14 and 16) from the pedestal. Be careful not
to damage the shaft.
It is not necessary to remove the inboard bearing
retaining ring (13) unless replacement is required.
Use snap ring pliers to remove the retaining ring if
necessary.
After removing the shaft and bearings, clean and
inspect the bearings in place as follows.
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 bear­
ings are removed.
Clean the pedestal, shaft and all component parts
(except the bearings) with a soft cloth soaked in
cleaning solvent. Inspect the parts for wear or dam­
age and replace as necessary.
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 bearings thoroughly in fresh cleaning
solvent. Dry the bearings with filtered compressed
air and coat with light oil.
Bearings must be kept free of all dirt and
foreign material. Failure to do so will great­
ly shorten bearing life. Do not spin dry
bearings. This may scratch the balls or
races and cause premature bearing fail­
ure.
Rotate the bearings by hand to check for rough­
ness or binding and inspect the bearing balls. If ro­
tation is rough or the bearing balls are discolored,
replace the bearings.
The bearing tolerances provide a tight press fit
onto the shaft and a snug slip fit into the pedestal.
Replace the bearings, shaft, or pedestal if the
proper bearing fit is not achieved.
If bearing replacement is required, use a bearing
puller to remove the bearings from the shaft.
Shaft and Bearing Reassembly
and Installation
Clean and inspect the bearings as indicated in
Shaft and Bearing Removal and Disassembly.