Gorman-Rupp Pumps PA6C60C-B-E50 460/3 1528569 and up - Manual (Page 42)

OM-06531 PA SERIES
MAINTENANCE & REPAIR PAGE E - 15
3 and 24B, Figure 4). Remove the plugs and drain
the oil from the seal cavity into the container. For
shorter drain time, remove the vented plug (5, Fig­
ure 4). Clean and reinstall the drain plugs and vent
plug. Inspect the oil for water, dirt or a cloudy condi­
tion which could indicate seal failure.
Separating Pump End From Power Source
(Figure 1)
Further disassembly of the pump requires separat­
ing the pump end from the power source. Discon­
nect the discharge piping from the pump casing.
Disengage the hardware (2 and 3) and remove the
coupling guard (6).
See Figure 2 and disengage the hardware 11, 12
and 13 and remove the belt guard (7). Remove the
hardware (8, 9 and 10) securing the air compres­
sor assembly (6) to the mounting flange (9, Figure
4). Use a pry bar to raise the air compressor high
enough to remove the spacers (14). Remove the
belt (15) from the air compressor drive pulley (not
shown).
Disconnect all hoses and fittings from the air com­
pressor and use a suitable hoist and sling to re­
move the air compressor assembly.
Disconnect the hardware securing the halves of
the coupling (4) and separate the coupling halves.
Remove the half of the coupling and the drive key
(31, Figure 4) from the impeller shaft.
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.
Remove the hardware (29 and 30) securing the
pump casing to the pump support bracket (31) and
use a sling and suitable lifting device to pull the
pump end straight away from the motor. Remove
the coupling half from the impeller shaft.
(Figure 2)
Remove the belt (15). Remove the setscrews from
the center of the bushing (16). Reinstall the
setscrews in the tapped holes in the bushing and
tighten them in an alternating pattern until the
bushing is “jacked” out of the sprocket (17). Slide
the bushing and sprocket off the shaft. Remove the
key (30, Figure 4).
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 the drive key (31) in the shaft keyway. Install
a lathe dog on the drive end of the shaft (10) 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.