Gorman-Rupp Pumps PA6C60-QSB4.5P 1537244 and up - Manual (Page 39)

OM-06553 PA SERIES
MAINTENANCE & REPAIR PAGE E - 17
pling must be replaced. To remove the ring, disen­
gage the hardware (5 and 6) securing it to the fly­
wheel.
Move the pump end to a clean, well equipped shop
area for further disassembly.
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 (3 gallons [11,4 liters]
minimum capacity) under the seal cavity drain
plugs (10A, Figure 5 and 7B, Figure 4). Remove the
plugs and drain the oil from the seal cavity into the
container. For shorter drain time, remove the
vented plugs (14, Figure 5 and 8, Figure 4). Clean
and reinstall the drain plug and vented plugs. In­
spect 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 and the pump casing to prevent rotation.
Remove the impeller capscrew and washer (26
and 27).
Install the shaft key (22) in the shaft keyway. Install
a lathe dog on the drive end of the shaft (23) with
the “V” notch positioned over the shaft key.
With the impeller rotation still blocked, see Figure 9
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 9. Loosening Impeller
NOTE
Do not remove the impeller until the rotating assem­
bly has been removed from the pump casing.
Pump Casing Removal
(Figure 4)
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.
Support the pump casing using a suitable hoist
and sling and remove the hardware (18 and 19).
Install four 1/2-13 UNC x 2‐inch long jacking
screws in the tapped holes in the bearing housing
(6, Figure 5). Tighten the jacking screws in an alter­
nating pattern until the pump casing is pushed off
of the bearing housing. Remove the jacking
screws and shims (17).