Gorman-Rupp Pumps PA4A60-4024T 1476457 and up - Manual (Page 38)

PA SERIES OM−06415
MAINTENANCE & REPAIR PAGE E − 16
authorized parts may result in damage to
the equipment and/or injury to personnel
and will invalidate the warranty.
Priming Chamber Removal And Disassembly
(Figure 6)
Disconnect both the suction piping and the air dis-
charge tubing from the priming chamber assembly
(12, Figure 3). Support the priming chamber as-
sembly using a sling and a suitable lifting device.
Remove the hardware (6 and 7) and separate the
priming chamber assembly, gasket (8) and baffle
(9) from the spool (6, Figure 3).
(Figure 7)
Remove the hardware (2 and 3) securing the prim-
ing valve (1) to the priming chamber (5). Carefully
lift the valve components from the priming cham-
ber. Remove the gasket (4) and clean the mating
surfaces.
If the priming valve float is stuck or the strainer (6) is
clogged, it can usually be cleaned without further
disassembly.
The only serviceable part of the priming valve is the
orifice button (not shown). If liquid continues to by-
pass through the priming chamber after adjusting
the orifice button (see Priming Chamber Reas-
sembly and Installation for adjustment), the but-
ton may require replacement. To replace the orifice
button, remove one of the e-clips" from the pivot
pin closest to the orifice button and remove the piv-
ot pin. This will allow the linkage to be raised high
enough to access the orifice button.
Remove the hex nut and lockwasher securing the
orifice button to the linkage bar and unscrew the
orifice button from the linkage bar.
Discharge Check Valve Removal and
Disassembly
(Figure 3)
Remove the hardware (not shown) securing the
discharge check valve bracket to the base.
Support the discharge check valve assembly (7)
using a sling and a suitable lifting device. Remove
the hardware (not shown) and separate the dis-
charge check valve assembly and gasket (not
shown) from the pump assembly (1).
The flapper and cover O-ring are the only service-
able parts of the check valve. If the flapper requires
replacement, remove the hardware securing the
cover. Separate the cover and O-ring and remove
the flapper.
Separating Pump and Drive Assembly From
Engine
(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 bear-
ing housing (11, Figure 5) to the engine bellhou-
sing. Remove the intermediate guards (12, Figure
5) and separate the assemblies by pulling the inter-
mediate 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 (23, 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.
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.