Gorman-Rupp Pumps 06B20-B 806819 and up - Manual (Page 24)

OM-01221 0 SERIES
MAINTENANCE & REPAIR PAGE E - 5
plete the cuts through the ring, and remove it from
the pump casing. Use caution not to damage the
pump casing bore when removing the wear ring.
Use caution not to damage the pump cas­
ing bore when removing the wear ring.
Impeller Removal
Before attempting to remove the impeller, remove
the bottle oiler and piping (11, 12, 13 and 14) from
the seal plate (9). This will prevent the oil in the res­
ervoir from escaping when the impeller is removed.
Immobilize the impeller by inserting a bar between
the impeller vanes, being careful not to damage
the vanes. Disengage the hardware (44, 45 and
46).
Install the shaft key (27). Install a lathe dog on the
drive end of the shaft (28) with the “V” notch posi­
tioned over the shaft key.
With the impeller rotation still blocked, see Figure 2
and use a long piece of heavy bar stock to pry
against the arm of the lathe dog in a counterclock­
wise direction (when facing the drive end of the
shaft). Use caution not to damage the shaft or key­
way. When the impeller breaks loose, remove the
lathe dog, key and wood block.
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 removed.
Remove the impeller adjusting shims (42). Tie and
tag the shims or measure and record their thick­
ness for ease of reassembly.
Seal Removal and Disassembly
(Figures 1 and 4)
Remove the seal spring. Slide the shaft sleeve (39)
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 shaft sleeve.
Remove the round head machine screws (10) and
slide the seal plate and stationary seat off the im­
peller shaft as a unit. Press the stationary portion of
the seal out of the seal plate from the back side. Pry
or press the oil seal (38) from the seal plate.
Inspect the wear ring (43) for excessive wear or
damage. The wear ring is secured in the seal plate
by a press fit. If replacement is required, use a
small bit to drill three holes through the ring hori­
zontally, 120
_ apart. Use a saw or chisel to com­
plete the cuts through the ring, and remove it from
the seal plate. Use caution not to damage the seal
plate bore when removing the wear ring.
Use caution not to damage the seal plate
bore when removing the wear ring.
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