Gorman-Rupp Pumps PAV3A60C-B 1511107 and up - Manual (Page 31)

OM-06525 PA SERIES
MAINTENANCE & REPAIR PAGE E - 11
Priming Valve Removal And Disassembly
(Figure 1)
Liquid within the priming hopper may be
pressurized. When draining liquid from the
priming hopper, use caution to avoid con­
tact with the liquid. Otherwise, injury to ser­
vice personnel may occur.
Disconnect the air discharge hose (22) from the
priming valve (14). Liquid will remain in the priming
valve. To drain the liquid, slowly remove the pipe
plug (not shown) in the valve body.
If draining is slow or difficult, the orifice in the valve
may be clogged (valve requires service).
Remove the hardware (10 and 11) and separate
the priming valve and hopper cap (12) from the
suction spool (7). Remove the gasket (9) and
strainer (8) from the suction spool and clean the
strainer as necessary.
It is not necessary to separate the priming valve
from the hopper cap unless complete replacement
of the priming valve is required. If replacement is
required, unscrew the priming valve from the nip­
ple (13).
(Figure 5)
Remove the hardware securing the priming valve
cover to the priming valve body. Carefully lift the
valve cover and components from the priming
valve. Remove the priming valve gasket and clean
the mating surfaces.
If the priming valve float is stuck, it can usually be
cleaned without further disassembly.
Cover
Body
Gasket
Orifice
Button
Float
Float
Arm
Figure 5. Priming Valve
If excessive liquid continues to bypass through the
priming valve after the pump is fully primed, the ori­
fice button may require replacement. Remove the
old orifice button from the hole in float arm and
install a new one.
Flap Valve Removal
(Figure 1)
Remove the discharge piping from the discharge
elbow (23).
Disengage the hardware (5 and 37) and remove
the discharge elbow (it may be necessary to tap on
the flange (15) with a soft‐faced mallet in order to
separate the discharge elbow from the flange).
With the discharge elbow removed, remove the
gasket (21). Unscrew the pin (16) from the flange.
Lift the flap valve assembly (18) out of the flange.
NOTE
Further disassembly of the flap valve is not required
since it must be replaced as a complete unit. Indi­
vidual parts are not sold separately.
Remove the flange if the gasket (4) requires re­
placement.
Pump Casing Removal
(Figures 1 and 2)
Support the pump casing using a suitable hoist
and sling. Use caution to not to damage the pump
casing.