Gorman-Rupp Pumps PA6C60C-F6L 1477478 and up - Manual (Page 39)

OM−05771 PA SERIES
MAINTENANCE & REPAIR PAGE E − 17
(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, 7 and 9) securing the
mounting flange (9, Figure 5) to the engine
bellhousing. Remove the intermediate guards (25,
Figure 5) and separate the assemblies by pulling
the pump straight away from the engine. The bell-
housing adaptor ring (not shown) will become a
free part.
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 belt (15, Figure 3). Remove the caps-
crews 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 (30, Figure 5).
Draining Oil From Seal Cavity
(Figures 4 and 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 large (3 gallon, minimum) clean contain-
er under the seal cavity drain plugs (7, Figure 4 and
24B, Figure 5). Remove the plugs and drain the oil
from the seal cavity into the container. For shorter
drain time, remove the vented plug (5, Figure 5).
Clean and reinstall the drain plugs 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) to prevent ro-
tation. Remove the impeller screw and washer (21
and 22).
Install the shaft 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 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.