Gorman-Rupp Pumps PA4A60C-B-E30 575/3 1482736 and up - Manual (Page 42)

OM−06440 PA SERIES
MAINTENANCE & REPAIR PAGE E − 15
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.
Remove the hardware (25, 26 and 27, Figure 1) se-
curing the pump casing to the pump support as-
sembly (28, Figure 1) and use a sling and suitable
suitable lifting device to pull the pump end straight
away from the power source. Remove the coupling
half from the impeller shaft.
Loosening Impeller
(Figure 4)
With the pump end separated from the power
source, wedge a block of wood between the vanes
of the impeller (1) and the pump casing (1, Figure
3) to prevent rotation.
Install one of the shaft keys (23) in the shaft key-
way. 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 8
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.
NOTE
Do not remove the impeller until the rotating assem-
bly has been removed from the pump casing.
Turn
Counterclockwise
Lathe Dog Arm
V" Notch
Shaft Key
Impeller Shaft
Lathe Dog
Setscrew
Heavy
Bar Stock
Figure 8. Loosening Impeller
Pump Casing and Wear Plate Removal
(Figure 3)
Position the pump assembly on a flat work surface
with the rotating assembly (8) positioned up. Sup-
port the pump casing (1) using wood blocks or oth-
er suitable material. Make sure the pump assembly
is secure and stable before proceeding with pump
disassembly.
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.