Gorman-Rupp Pumps PA6C60-4045T-ESP 1450296 thru 1479000 - Manual (Page 42)

PA SERIES OM−06341
MAINTENANCE & REPAIR PAGE E − 20
direct exposure or emitted fumes. Wear
adequate protective clothing when
working on the pump or piping.
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 8)
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 (6 and 7) and separate the priming
chamber assembly, baffle (9) and gasket (8) from
the pump assembly.
(Figure 9)
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 5)
Remove the hardware (not shown) securing the
discharge check valve bracket to the base.
Support the discharge check valve (2) using a sling
and a suitable lifting device. Remove the hardware
(not shown) and separate the discharge check
valve assembly and gasket from the pump assem-
bly (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 re-
move the flapper.
Back Cover Plate and Wear Plate Removal
(Figure 6)
The wear plate (24) is easily accessible and may be
serviced by removing the back cover plate (32).
Before attempting to service the pump, remove the
pump casing drain plug (10B) and drain the pump.
Clean and reinstall the drain plug.
Remove the back cover nuts (31) and pry the back
cover and assembled wear plate from the pump
casing (1).
NOTE
An alternate method of removing the back cover
from the pump casing is to remove the back cover
nuts (31) and two diagonally opposing locking col-
lars (28). Use the adjusting screws (30) to press the
back cover out of the pump casing.
Remove and discard the O-rings (16 and 25).
Inspect the wear plate and, if replacement is re-
quired, remove the hardware (26 and 27) securing
it to the back cover plate.
Separating Pump And Drive Assembly From
Engine
(Figure 10)
Further disassembly of the pump requires separat-
ing the pump end and drive assembly from the en-