Gorman-Rupp Pumps PA6C60C-F4L 1318119 thru 1504810 - Manual (Page 39)

OM-05768 PA SERIES
MAINTENANCE & REPAIR PAGE E - 17
Disengage the hardware (11 and 12) and remove
the belt guard assembly (7). Remove the hardware
(8, 9 and 10) securing the air compressor assem­
bly (6) to the mounting flange (9, Figure 5). Use a
pry bar to raise the air compressor high enough to
remove the spacers (13). Remove the adjustable
V‐belt (14) from the air compressor drive sheave
(16).
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 (8 and 9) 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 (1) 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 (3).
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 (6 and 7) 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 adjustable V‐belt (9). Remove the
capscrews from the center of the bushing (10). Re­
install 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. Re­
move 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 clean container under the seal cavity
drain plug (15). Remove 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 4)
With the pump end separated from the engine,
wedge a block of wood between the vanes of the
impeller (1, Figure 5) and the pump casing (1) to
prevent rotation. Remove the impeller screw and
washer (21 and 22).
See Figure 5 and install the 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 po­
sitioned 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
bly has been removed from the pump casing.