Gorman-Rupp Pumps PA4A60C-C2.2T 1394774 and up - Manual (Page 40)

PA SERIES OM-05783
MAINTENANCE & REPAIR PAGE E - 18
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 7)
Disconnect both the suction piping and the air dis­
charge tubing from the priming chamber assembly
(1). Support the priming chamber assembly 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 pump assembly.
(Figure 8)
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 lock washer 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 (26)
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 3)
The pump and drive assembly must be separated
from the engine before further disassembly.
Disengage the hardware (11, 12 and 13) and re­
move the belt guard assembly (10). Remove the
hardware (17, 18 and 19) securing the air com­
pressor assembly (8) to the mounting flange (8,
Figure 5). Use a pry bar to raise the air compressor
high enough to remove the spacers (20). Remove
the belt (9) from the air compressor drive pulley
(not shown).
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 9)
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
mounting flange (18, Figure 5) to the engine
bellhousing. Remove the intermediate guards (20,
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 (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