Gorman-Rupp Pumps 16A22-B 1068713 and up - Manual (Page 25)

OM−00711−04 10 SERIES
MAINTENANCE & REPAIR PAGE E − 5
(12) and pedestal (23). Clean the mating surfaces
of the seal plate and pump casing. Tie and tag the
gaskets, or measure and record their thickness for
ease of reassembly.
Impeller Removal
Before removing the impeller, remove the bottle oil-
er and piping (16, 17, 18 and 19). Remove the seal
drain plug (44) and drain the oil from the seal cavity
to prevent the oil from escaping when the impeller
is removed. Clean and reinstall the drain plug.
Immobilize the impeller by wedging a block wood
between the vanes. Remove the impeller caps-
crew and washer (49 and 50).
If removed, install the shaft key (29). Install a lathe
dog on the drive end of the shaft (21) with the V"
notch positioned over the shaft keyway.
With the impeller rotation still blocked, strike the
lathe dog sharply in a counterclockwise direction
(when facing the drive end of the shaft). The impel-
ler may also be loosened by using 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 wood block and unscrew the impeller
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. Slide the impeller adjusting shims (74)
off the impeller shaft. Tie and tag the shims or mea-
sure and record their thickness for ease of reas-
sembly.
Seal Removal and Disassembly
Remove the spring centering washer and seal
spring. Slide the shaft sleeve (75) and rotating por-
tion of the seal off the shaft as a single unit. Apply oil
to the sleeve and work it up under the bellows.
Slide the rotating portion of the seal off the shaft
sleeve. Use a stiff wire with a hooked end to re-
move the stationary element, seat and O-rings
from the seal plate. Slide the seal plate (12) and oil
seal (43) off the shaft. Use a suitable sized dowel
and press the oil from the seal plate.
NOTE
An alternate method of removing the seal assembly
is to slide the seal plate, shaft sleeve and seal as-
sembly off the shaft as a single unit. Place the seal
plate on a flat surface with the impeller side down.
Using a suitable sized dowel, press the seal com-
ponents from the seal plate. Press the oil seal 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