Gorman-Rupp Pumps 03F52-B 1329227 and up - Manual (Page 23)

OM-01190 0 SERIES
MAINTENANCE & REPAIR PAGE E - 5
Impeller Removal
Immobilize the impeller by placing a soft brass rod
between the vanes. Remove the hardware (25 and
26) securing the impeller to the shaft. If removed,
install the shaft key (14). Install a lathe dog on the
drive end of the shaft (15) with the “V” notch posi­
tioned over the shaft keyway.
With the impeller rotation still blocked, use a long
piece of heavy bar stock to pry against the arm of
the lathe dog in a counterclockwise direction
(when facing the drive end of the shaft) as shown in
Figure 2. Use caution not to damage the shaft or
keyway. When the impeller breaks loose, remove
the lathe dog and brass rod and unscrew the im­
peller from the shaft.
Turn
Counterclockwise
Lathe Dog Arm
“V” Notch
Shaft Key
Impeller Shaft
Lathe Dog
Setscrew
Heavy
Bar Stock
Figure 2. Loosening Impeller
Unscrew the impeller from the shaft. Use caution
when removing the impeller; tension on the seal
spring will be released as the impeller is un­
screwed.
Inspect the impeller and replace it if cracked or
badly worn.
Seal Removal and Disassembly
(Figures 1 and 3)
Remove the seal spring. Slide the shaft sleeve (17)
and rotating portion of the seal off the shaft as a
unit.
Apply oil to the sleeve and work it up under the rub­
ber bellows. Slide the rotating portion of the seal off
the sleeve.
Slide the seal plate and stationary element off the
impeller shaft as a unit.
Position the seal plate on a flat surface with the im­
peller side down. Use a dowel or other suitable tool
to press the stationary 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.
Remove the slinger ring (22). Disengage the hard­
ware (12 and 13) and slide the bearing cap (16) off
the shaft. Remove the bearing shim set (18). Tie
and tag shims or measure and record their thick­
ness for ease of reassembly.
Place a block of wood against the impeller end of
the shaft (15) and tap the shaft and assembled
bearings (19 and 21) 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