Gorman-Rupp Pumps PA6C60C-F6L 1423057 thru 1477477 - Manual (Page 39)

OM−05771 PA SERIES
MAINTENANCE & REPAIR PAGE E − 17
Disengage the hardware (11, 12 and 13) and re-
move the belt guard assembly (7). Remove the
hardware (8, 9 and 10) securing the air compres-
sor assembly (6) to the mounting flange (9, Figure
5). Use a pry bar to raise the air compressor high
enough to remove the spacers (14). Remove the
adjustable V-belt (15) from the air compressor
drive sheave (17).
Disconnect all hoses and fittings from the air com-
pressor and use a suitable hoist and sling to re-
move the air compressor assembly.
(Figure 8)
Support the pump end using a hoist and sling, and
remove the hardware (not shown) securing the
pump casing to the base.
Remove the hardware (6 and 7) securing the inter-
mediate to the engine bellhousing. Remove the in-
termediate guards (27, Figure 5), and separate the
assemblies by pulling the intermediate straight
away from the engine.
As the assemblies separate, the flexible portion of
the coupling assembly (3) will remain on the shaft.
To remove the coupling from the shaft, unscrew the
two allen head setscrews from the bushing (2).
Screw one of the setscrews into the puller hole on
the circumference of the bushing. As the coupling
and bushing separate, remove the bushing, and
slide the coupling off the shaft. Remove the shaft
key (35, Figure 5).
It is not necessary to remove the outer ring of the
coupling from the engine flywheel unless the cou-
pling must be replaced. To remove the ring, disen-
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 4)
Remove the capscrews from the center of the
bushing (10). Reinstall the capscrews in the
tapped holes in the bushing and tighten them in an
alternating pattern until the bushing is jacked" out
of the sheave (11). Slide the bushing and sheave
off the shaft. Remove the key (34, Figure 5).
Draining Oil From Seal Cavity
(Figure 4)
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 large (3 gallons [12 liters] or more) clean
container under the seal cavity drain plug (18). Re-
move the plug and drain the oil from the seal cavity
into the container. For shorter drain time, remove
the vented plug (8). 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. Remove the impeller screw and
washer (21 and 22).
Install one of the shaft keys (34 or 35) 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 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.
NOTE
Do not remove the impeller until the rotating assem-