Gorman-Rupp Pumps PA6C60C-F6L 1423057 thru 1477477 - Manual (Page 38)

PA SERIES OM−05771
MAINTENANCE & REPAIR PAGE E − 16
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 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, gasket (8) and baffle (9) from
the pump assembly.
(Figure 7)
Remove the hardware (3 and 4) securing the prim-
ing valve (1) to the priming chamber (6). Carefully
lift the valve components from the priming cham-
ber. Remove the gasket (7) and clean the mating
surfaces.
If the priming valve float is stuck or the strainer (5) is
clogged, it can usually be cleaned without further
disassembly.
The only serviceable part of the priming valve is the
orifice button (2). If liquid continues to bypass
through the priming chamber after adjusting the
orifice button (see Priming Chamber Reassemb-
ly and Installation for adjustment), the button may
require replacement. To replace the orifice button,
remove one of the e-clips" from the pivot pin clos-
est to the orifice button and remove the pivot 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 hardware (not shown) securing the
discharge check valve bracket to the base.
Support the discharge check valve assembly (27)
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.
Back Cover Plate and Wear Plate Removal
(Figure 4)
The wear plate (5) is easily accessible and may be
serviced by removing the back cover (22). Before
attempting to service the pump, remove the pump
casing drain plug (19) and drain the pump. Clean
and reinstall the drain plug.
Remove the back cover nuts (26) 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 (26) and two diagonally opposing locking col-
lars (23). Use the adjusting screws (24) to press the
back cover out of the pump casing.
Remove and discard the O-rings (6 and 21).
Inspect the wear plate (5) and, if replacement is re-
quired, remove the hardware (3 and 4) securing it
to the back cover plate.
Separating Pump and Drive Assembly From
Engine
(Figure 3)
The pump and drive assembly must be separated
from the engine before further disassembly.