Gorman-Rupp Pumps 03B51-B 1371962 and up - Manual (Page 24)

OM-01239 0 SERIES
MAINTENANCE & REPAIR PAGE E - 5
peller; tension on the seal spring will be released as
the impeller is removed. Retain the impeller key (8).
Remove the impeller adjusting shims (14). Tie and
tag the shims, or measure and record their thick­
ness for ease of reassembly.
Seal Removal and Disassembly
(Figures 1 and 3)
Remove the seal spring. Apply oil to the shaft and
work it up under the rubber bellows. Slide the rotat­
ing portion of the seal off the shaft.
Slide the seal plate and stationary element off the
impeller shaft as a unit. Press the stationary seal
element and O‐ring out of the seal plate from the
back side.
Shaft And Bearing Removal And Disassembly
Shaft and bearing disassembly in the field
is not recommended. These operations
should be performed only in a properly
equipped shop by qualified personnel.
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.
NOTE
There are no provisions for draining the grease
from the pedestal cavity. Place a drip pan under the
pedestal before removing the shaft and bearing.
Disengage the hardware (17 and 18) and slide the
bearing cap (12) off the shaft(15). Tie and tag bear­
ing shim set (19) for ease of reassembly.
Place a block of wood against the impeller end of
the shaft and tap the shaft and assembled bear­
ings (20 and 22) from the pedestal.
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 suitable
bearing puller to remove the bearings from the
shaft.