Gorman-Rupp Pumps PA4E71C-3TNV88-SE 1416614 and up - Manual (Page 47)

OM−06244 PA SERIES
MAINTENANCE & REPAIR PAGE E − 25
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 11)
Disconnect the air discharge tubing from the prim-
ing chamber assembly (1). Support the priming
chamber assembly using a sling and a suitable lift-
ing device. Remove the hardware (6 and 7) and
separate the priming chamber assembly, gasket
(8) and baffle (9) from the spool (33, Figure 8).
(Figure 12)
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 7)
Support the discharge check valve assembly (46)
using a sling and a suitable lifting device. Remove
the nuts (17) and separate the discharge check
valve assembly and gasket (49) from the eccentric
spool (50).
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.
Suction Adaptor and Wear Plate Removal
(Figure 6)
The wear plate (26) is easily accessible and may be
serviced by removing the suction adaptor (23). Be-
fore attempting to service the pump, see Figure 14
and open the shutoff valve (5) to drain the pump
casing. When the casing is fully drained, close the
shutoff valve.
It is not necessary to remove the hopper spool (33,
Figure 8) or suction extension to remove the suc-
tion adaptor. Remove the hardware (14 and 15) se-
curing the suction adaptor to the suction support
bracket (16).
Install two 3/8−16 UNC 2B capscrews (not sup-
plied) in the jacking holes in the suction adaptor,
and use the screws to jack" the suction adaptor
and assembled wear plate from the pump casing
(1). Remove the jacking screws from the suction
adaptor.
Inspect the wear plate and replace it if badly scored
or worn. To remove the wear plate, remove the nuts
(17) and adjusting screws (20) and separate the
wear plate from the suction adaptor.
Inspect the O-rings (24, 25 and 27) and replace
them if damaged or worn.
Separating Pump and Drive Assembly From
Engine
The pump and drive assembly must be separated
from the engine before further disassembly.
Use lifting and moving equipment in
good repair and with adequate capacity
to prevent injuries to personnel or dam-
age to equipment. If slings or chains are
used to move the pump or components,
make sure that the load is balanced;