Gorman-Rupp Pumps 82H2-B 716064 and up - Manual (Page 23)

OM−00828 80 SERIES
MAINTENANCE & REPAIR PAGE E − 5
Impeller Removal
Before removing the impeller, turn the cross arm on
the automatic grease cup (4) clockwise until it rest
against the cover (see Figure 4). This will prevent
the grease from escaping when the impeller is re-
moved.
Immobilize the impeller by wedging a block wood
between the vanes. If removed, install the shaft
key (17). Install a lathe dog on the drive end of the
shaft (18) 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 (7)
off the impeller shaft. Tie and tag the shims, or
measure and record their thickness for ease of
reassembly.
Seal Removal and Disassembly
(Figures 1 or 3)
Remove the grease cup and piping (4, 5 and 6)
from the seal plate. Slide the seal plate (29) and
seal assembly off the shaft (18) as a unit. Carefully
remove the rotating and stationary seal elements,
packing rings, stationary washers, seal spring and
shaft sleeve from the seal plate.
Inspect the seal liner (8) for wear or grooves which
could cause leakage or damage to the seal pack-
ing rings. The seal liner is a press fit in the seal plate
and does not normally require replacement. If seal
liner replacement is required, refer to Seal Reas-
sembly and Installation.
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-e-
quipped shop by qualified personnel
.
Remove the pedestal drain plug (25) and drain the
pedestal. Clean and reinstall the plug.
Remove the slinger ring (9) from the shaft. Remove
the pedestal mounting hardware from the base.
Tie and tag any shims used under the mounting
feet for leveling.
Use snap ring pliers to remove the bearing retain-
ing ring (16) from the pedestal bore. Remove the
bearing shim set (22); tie and tag the shims, or
measure and record their thickness for ease of
reassembly.