Gorman-Rupp Pumps 12B20-B 1340494 and up - Manual (Page 29)

10 SERIES OM-00588
MAINTENANCE & REPAIR PAGE E - 6
Position the seal plate on a flat surface with the im­
peller side up and press the oil seal (9) from the
seal plate.
Inspect the seal plate and replace it if cracked or
badly worn.
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.
NOTE
There are no provisions for draining the lubricant
from the pedestal. Place a drip pan under the ped­
estal before disassembly.
Remove the pedestal drain plug (25) and drain the
bearing lubricant. Clean and reinstall the drain
plug.
Remove the slinger ring (27).
Use snap ring pliers to remove the bearing retain­
ing ring (20) from the pedestal bore. Remove the
bearing shim set (15). Tie and tag the shims or
measure and record their thickness for ease of
reassembly.
Remove the setscrews (18) from the bearing re­
tainer (14) and install two 10-32 UNF by 1 inch
long screws (not supplied) in the holes. Use two
screwdrivers to pry against the heads of the screws
to remove the bearing retainer from the pedestal
bore. Do not use the screws as jacking screws to
remove the retainer. Remove the screws from the
retainer and reinstall the setscrews.
Press the oil seal (16) from the bearing retainer. Re­
move the bearing retainer O‐ring (21) from the
groove in the pedestal bore.
Place a block of wood against the impeller end of
the shaft and tap the shaft and assembled bear­
ings (10 and 13) from the pedestal. Be careful not
to damage the shaft.
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.
Inspect the shaft for distortion, nicks or scratches,
or for thread damage on the impeller end. Dress
small nicks and burrs with a fine file or emery cloth.
Replace the shaft if defective.
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