Gorman-Rupp Pumps PA10A60-4045H-ESP 1423416 thru 1485219 - Manual (Page 39)

OM-06351 PA SERIES
MAINTENANCE & REPAIR PAGE E - 19
Suction Head And Wear Ring Removal
(Figure 6)
Support the suction head (34) using a suitable
hoist and sling.
Remove the hardware (9 and 10). Use a pair of pry
bars or large screwdrivers to pry the suction head
and wear ring (35) from the pump casing (1).
Inspect the wear ring. If replacement is required, or
if the O‐rings (7 and 31) require replacement, re­
move the hardware (15 and 16) securing the suc­
tion head to the wear ring.
Use a set of pry bars or large screwdrivers to pry
the suction head and wear plate out of the volute
casing.
Remove the adjusting screws and jam nuts (32
and 33). Remove the jam nuts from the adjusting
screws and reinstall the adjusting screws. Use the
adjusting screws to push the wear ring out of the
suction head.
Remove the adjusting screws, install the jam nuts,
and reinstall the adjusting screws in the suction
head.
Separating Intermediate And Drive Assembly
From Engine
(Figure 7)
Further disassembly of the pump requires separat­
ing the pump end and drive assembly from the en­
gine. Disconnect the discharge piping from the
pump casing.
Remove the hardware (5 and 6) securing the inter­
mediate to the bellhousing. Separate the assem­
blies 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 (19, Figure 6).
It is not necessary to remove the outer ring of the
coupling from the flywheel unless the coupling
must be replaced. To remove the ring, disengage
the hardware (3 and 4) securing it to the flywheel.
Move the pump end to a clean, well equipped shop
area for further disassembly.
Draining Oil From Seal Cavity
(Figure 6)
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 (1 gallon [4 liter] mini­
mum), under the seal cavity drain plug (27A). Re­
move the drain plug and drain the oil from the seal
cavity into the container. Clean and reinstall the
drain plug. Inspect the oil for water, dirt or a cloudy
condition which could indicate seal failure.
Loosening Impeller
(Figures 6 and 8)
With the pump end separated from the power sour­
ce, position the pump end on a flat surface with the
drive end facing up. Insert a block of wood through
the pump discharge and wedge it between the
vanes of the impeller and the pump casing to pre­
vent rotation.
Install the shaft key (19) in the shaft keyway. Install
a lathe dog on the drive end of the shaft (20) 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.