Gorman-Rupp Pumps 68A2-B 818301 and up - Manual (Page 26)

OM−01467 60 SERIES
MAINTENANCE & REPAIR PAGE E − 5
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 (15)
off the impeller shaft. Tie and tag the shims, or
measure and record their thickness for ease of
reassembly.
Seal Removal and Disassembly
Remove the outer rotating element. Remove the
grease cup and piping (9, 10, 11 and 12) from the
seal plate (49).
Remove the hardware (43 and 44) and slide the
seal plate and remaining seal parts off the shaft as
a unit. Carefully remove the stationary and rotating
seal elements, packing rings and washers, seal
spring and spacer sleeve from the seal plate.
Inspect the seal plate and replace it if cracked or
badly worn. Inspect the wear ring (50) for exces-
sive wear or scoring. If replacement is required,
drill three holes horizontally, 120
_ apart, through
the wear ring. Use a chisel or other suitable tool to
complete the cuts. Use caution not to damage the
seal plate bore. Remove the wear ring sectons
from the seal plate.
Inspect the seal liner (14) for wear or grooves that
could cause leakage or damage to the seal pack-
ing rings. The seal liner is a press fit into the seal
plate and does not normally require replacement. If
replacement is required, see Seal Installation.
Pump Casing and Pedestal Adaptor Removal
To remove the pump casing (1), support the casing
using a suitable hoist and sling and remove the
hardware (39 and 40) securing the casing to the
pedestal adaptor (8). Remove the casing by pull-
ing it straight away from the adaptor.
If the pedestal (27) is to be serviced, disengage the
hardware (5, 6 and 7) and separate the pedestal
adaptor from the pedestal.
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.
Remove the pedestal drain plug (31) and drain the
pedestal. Clean and reinstall the plug.
Remove the slinger ring (13) from the shaft. Re-
move 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 (28) from the pedestal bore. Remove the
bearing shim set (29); tie and tag the shims, or
measure and record their thickness for ease of
reassembly.