PA SERIES
OM-07323
MAINTENANCE & REPAIR
PAGE E - 16
the pump or component only as high as
necessary and keep personnel away
from suspended objects.
Use
Only Genuine Gorman-Rupp
re
placement parts. Failure to do so may cre
ate a hazard and damage the pump or di
minish optimal pump performance. Any
such hazard, damage or diminished per
formance is not covered by the warranty.
NOTE
When appropriate recycling facilities are available,
the user should recycle components and fluids
when doing any routine maintenance / repairs and
also at the end of the pump’s useful life. All other
components and fluids shall be disposed of ac
cording to all applicable codes and regulations.
Priming Chamber Removal and Disassembly
(Figure 6)
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 (5 and 6) and separate the priming
chamber assembly, gasket (8) and baffle (7) from
the spool (4, 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 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 (23)
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.
Diaphragm Primer Removal
(Figures 3 and 5)
NOTE
Whenever complete disassembly is necessary it is
recommended to remove the Diaphragm Primer
from the pump. The unit should be moved to a clean
working area, such as a workbench, for disassem
bly and reassembly.
Disengage the belt guard mounting hardware (15,
16 and 17, Figure 3) and remove the belt guard
(14, Figure 3). Disconnect the suction hose (5, Fig
ure 3) from the diaphragm primer by removing the
hose clamp (4, Figure 3). Disengage the mounting
hardware (8, 9 and 10, Figure 3) securing the di
aphragm primer to the mounting flange (9, Figure
5).
