Gorman-Rupp Pumps PAV3B60C-3TNV70 1433753 and up - Manual (Page 31)

OM-06260 PA SERIES
MAINTENANCE & REPAIR PAGE E - 13
can occur if proper lifting procedures
are not observed. Make certain that
hoists, chains, slings or cables are in
good working condition and of suffi­
cient capacity and that they are posi­
tioned so that loads will be balanced
and the pump or components will not be
damaged when lifting. Suction and dis­
charge hoses and piping must be re­
moved from the pump before lifting. Lift
the pump or component only as high as
necessary and keep personnel away
from suspended objects.
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 Valve Removal And Disassembly
(Figure 2)
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 tubing from the prim­
ing 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 may
be clogged (valve requires service).
Remove the hardware (11 and 12) and separate
the priming chamber and hopper cap (10) from the
suction spool (7). Remove the gasket (9) and
strainer (8) from the suction spool and clean the
strainer as necessary.
(Figure 6)
Remove the hardware securing the priming valve
cover to the priming chamber body. Carefully lift
the valve cover and components from the priming
chamber. 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 6. Priming Chamber
If excessive liquid continues to bypass through the
priming chamber after the pump is fully primed, the
orifice button may require replacement. Remove
the old orifice button from the hole in float arm and
install a new one.
Flap Valve Removal
(Figure 2)
Remove the discharge piping from the discharge
elbow (23).
Remove 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 sepa­
rate 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.
Inspect the flap valve parts for wear or damage. If
replacement is required, remove the hardware se­
curing the backup plate and flap valve adaptor to
the flap valve, and remove the flap valve. Press the
spacer sleeves out of the flap valve.