Gorman-Rupp Pumps PA4A60C-C2.2T 1394774 and up - Manual (Page 41)

OM-06168 PA SERIES
MAINTENANCE & REPAIR PAGE E - 19
gage the hardware (4 and 5) securing it to the fly­
wheel.
Remove any leveling shims used under the casing
mounting feet. Tie and tag the shims for ease of
reassembly.
Move the pump end to a clean, well equipped shop
area for further disassembly.
(Figure 3)
Remove the belt (9). Remove the capscrews from
the center of the bushing (25). Reinstall the caps­
crews in the tapped holes in the bushing and tight­
en them in an alternating pattern until the bushing
is “jacked” out of the sprocket (24). Slide the bush­
ing and sprocket off the shaft. Remove the key (31,
Figure 5).
Draining Oil From Seal Cavity
(Figure 5)
If any further disassembly is to be performed on the
pump, the seal oil cavity must be drained to pre­
vent the oil in the seal cavity from escaping as the
pump casing is removed.
Position a clean container under the seal cavity
drain plug (15A). Remove the plug and drain the oil
from the seal cavity into the container. For shorter
drain time, remove the vented plug (10). Clean and
reinstall the drain plug and vent plug. Inspect the
oil for water, dirt or a cloudy condition which could
indicate seal failure.
Loosening Impeller
(Figure 5)
With the pump end separated from the engine,
wedge a block of wood between the vanes of the
impeller (1) and the pump casing (1, Figure 4) to
prevent rotation.
Install the shaft key (23) in the shaft keyway. Install
a lathe dog on the drive end of the shaft (24) with
the “V” notch positioned over the shaft key.
With the impeller rotation still blocked, see Figure
10 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 10. Loosening Impeller
Pump Casing And Wear Plate Removal
(Figure 4)
Support the pump casing using a suitable hoist
and sling.
Use lifting and moving equipment in
good repair and with adequate capacity
to prevent injuries to personnel or dam­
age to equipment. If slings or chains are
used to move the pump or components,
make sure that the load is balanced;
otherwise serious personal injury or
death could result. Suction and dis­
charge hoses and piping must be re­
moved from the pump before lifting.
NOTE
Drain the oil from the seal cavity before removing
the pump casing. See Draining Oil From Seal Cav­
ity.
Remove the hardware (9 and 10) securing the
pump casing (1) to the rotating assembly (8). Pull
the pump casing straight away from the rotating