Gorman-Rupp Pumps PA6B60-6068H 1421583 and up - Manual (Page 35)

OM−06250 PA SERIES
MAINTENANCE & REPAIR PAGE E − 13
Use only replacement parts provided or
approved by Gorman-Rupp. Use of non-
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 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 suction spool (5, 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 discharge piping. Support the dis-
charge check valve assembly (7) using a sling and
a suitable lifting device. Remove the nuts (4) and
separate the discharge check valve assembly and
gasket (9) 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 and O-ring. Separate the valve cover and O-
ring and remove the flapper.
Suction Head Removal
(Figure 4)
Remove the suction and discharge piping. Before
attempting to service the pump, remove the pump
casing drain plug (7) and drain the pump. Clean
and reinstall the drain plug.
Remove the nuts (34) and use the jacking screws
(43) to force the suction head (38) out of the pump
casing. Turn the screws evenly to prevent binding.
Remove the suction head gasket (37).
Inspect the wear ring (39) for excessive wear or
scoring. If replacement is required, use a small bit
to drill three holes horizontally, 120
_ apart, through
the wear ring. Use a chisel or other suitable tool to
complete the cuts through the wear ring. Use cau-
tion not to damage the suction cover bore. Re-
move the wear ring from the suction head.
Impeller Removal
(Figure 4)
Before attempting to remove the impeller (2), re-
move the pipe plug (32) and drain the seal cavity.
This will prevent the seal lubricant from spilling as
the impeller is removed.
To remove the impeller, secure the shaft from rotat-
ing by reaching through the discharge port and
tightly wedging a soft-metal bar between the vanes
of the impeller.
Remove the fillister head screw (40) and impeller
nut (42). Install two 3/8−16 UNC by 3-inch long