Gorman-Rupp Pumps PA10A60-4045H-ESP 1485220 and up - Manual (Page 40)

PA SERIES OM-06351
MAINTENANCE & REPAIR PAGE E - 20
Turn
Counterclockwise
Lathe Dog Arm
“V” Notch
Shaft Key
Impeller Shaft
Lathe Dog
Setscrew
Heavy
Bar Stock
Figure 8. Loosening Impeller
Pump Casing Removal
(Figure 6)
With the pump end resting on a flat surface and the
drive end facing up, secure a suitable lifting device
to the bellhousing mounting holes in the intermedi­
ate (14).
Remove the hardware (9 and 10). Apply tension on
the lifting device and use a pair of pry bars or large
screwdrivers to separate the pump casing at the
gasket (29).
Remove the rotating portion of the pump and place
it on a clean work surface. Discard the pump cas­
ing gasket.
Impeller Removal
(Figure 6)
To remove the impeller (2), unscrew it in a counter­
clockwise direction (when facing the impeller). Use
caution when removing the impeller; tension on
the shaft seal spring will be released as the impeller
is unscrewed. Inspect the impeller and replace it if
cracked or badly worn.
Seal Removal
(Figures 6 and 9)
Slide the impeller adjusting shims (4) off the impel­
ler shaft. Tie and tag the shims or measure and re­
cord their thickness for ease of reassembly.
Remove the seal spring. Lubricate the shaft in the
area adjacent to the seal with light oil and work it up
under the bellows. Slide the rotating portion of the
seal (consisting of the bellows, retainer, and rotat­
ing element) off the shaft as a unit.
Slide the seal plate and stationary portion of the
seal off the shaft. Position the seal plate on a flat
surface with the impeller side down. Use a wooden
dowel or other suitable tool to press on the back
side of the stationary seat until the seat, element
and O‐rings can be removed.
Remove the seal plate O‐ring (7).
If no further disassembly is required, refer to Seal
Installation.
Shaft and Bearing Removal and Disassembly
(Figure 6)
When the pump is properly operated and main­
tained, the bearing housing should not require dis­
assembly. 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 bearing housing drain plug (27) and
drain the lubricant. Clean and reinstall the drain
plug.
Disengage the hardware (15 and 16) and remove
the bearing cover (17), gasket (24) and oil seal
(22). Use a suitably sized dowel to press the oil seal
from the bearing cover.
Place a block of wood against the impeller end of
the shaft (20) and tap the shaft and assembled
bearings (18 and 28) from the intermediate. Press