GORMAN-RUPP PA6D60-4045T, Инструкция по установке, эксплуатации и обслуживанию, Страница: 37 / 46

OM-06622
PA SERIES
MAINTENANCE & REPAIR PAGE E - 17
Separating Pump And Drive Assembly From
Engine
(Figure 8)
Further disassembly of the pump requires separat­
ing the pump end from the engine. Disconnect the
discharge piping from the pump casing.
See Figure 5 and disengage the hardware (29 and
30) and remove the guards (19).
Remove the remaining hardware (7 and 8) secur­
ing the drive flange (4) to the engine bellhousing.
Separate the assemblies by pulling the pump end
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 (5 and 6) securing it to the fly­
wheel.
Move the pump end to a clean, well equipped shop
area for further disassembly.
Draining Oil From Seal Cavity
(Figure 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 clean container (3 gallons [11,4 liters]
minimum capacity) under the seal cavity drain
plugs (12, Figure 4 and 8B, Figure 5). Remove the
plugs and drain the oil from the seal cavity into the
container. For shorter drain time, remove the
vented plugs (13, Figure 4 and 10, Figure 5). Clean
and reinstall the drain plug and vented plugs. In­
spect the oil for water, dirt or a cloudy condition
which could indicate seal failure.
Loosening Impeller
(Figures 5 and 9)
With the pump end separated from the engine, in­
sert a block of wood through the pump discharge
and wedge it between the vanes of the impeller
and the pump casing to prevent rotation. Remove
the impeller capscrew and washer (27 and 28).
Install the shaft key (23) in the shaft keyway. 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 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.
Turn
Counterclockwise
Lathe Dog Arm
“V” Notch
Shaft Key
Impeller Shaft
Lathe Dog
Setscrew
Heavy
Bar Stock
Figure 9. Loosening Impeller
Pump Casing Removal
(Figure 4)
Support the pump casing using a suitable hoist
and sling and remove the hardware (10 and 11A).
Install four 1/2-13 UNC x 2‐inch long jacking
screws in the tapped holes in the bearing housing
(9, Figure 5). Tighten the jacking screws in an alter­