Gorman-Rupp Pumps PA6C60C-F5L All serial numbers - Manual (Page 39)

OM-05770 PA SERIES
MAINTENANCE & REPAIR PAGE E - 17
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 (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 (26)
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 (17). Before
attempting to service the pump, remove the pump
casing drain plug (7C) and drain the pump. Clean
and reinstall the drain plug.
Remove the back cover knobs (21) 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
knobs (21) and two diagonally opposing locking
collars (18). Use the adjusting screws (19) to press
the back cover out of the pump casing.
Remove and discard the O‐rings (6 and16).
Inspect the wear plate 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.
Disengage the hardware (11, 12 and 13) and re­
move the belt guard assembly (7). Remove the
hardware (8, 9 and 10) securing the air compres­
sor assembly (6) to the mounting flange (9, Figure
5). Use a pry bar to raise the air compressor high
enough to remove the spacers (14). Remove the
synchronous belt (15) from the air compressor
drive sheave (17).
Disconnect all hoses and fittings from the air com­
pressor and use a suitable hoist and sling to re­
move the air compressor assembly.