Gorman-Rupp Pumps PA6C60-QSB4.5P 1537244 and up - Manual (Page 38)

PA SERIES OM-06553
MAINTENANCE & REPAIR PAGE E - 16
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 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 (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 gasket are the only serviceable
parts of the check valve. If the flapper requires re­
placement, remove the hardware securing the
cover and gasket. Separate the valve cap and re­
move the flapper.
Back Cover Plate and Wear Plate Removal
(Figure 4)
The wear plate (24) is easily accessible and may be
serviced by removing the back cover plate assem­
bly (32). Before attempting to service the pump,
drain the pump casing.
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 8)
Further disassembly of the pump requires separat­
ing the pump end and drive assembly from the en­
gine. Disconnect the discharge piping from the
pump casing.
See Figure 4 and disengage the hardware (14 and
30) and remove the guards (17).
Remove the remaining hardware (7 and 8) secur­
ing the drive flange to the engine bellhousing. Sep­
arate the assemblies by pulling the pump end
straight away from the engine.
As the assemblies separate, the flexible portion of
the coupling assembly (1) will remain on the shaft.
To remove the coupling from the shaft, unscrew the
two allen head setscrews from the bushing (2).
Screw one of the setscrews into the puller hole on
the circumference of the bushing. As the coupling
and bushing separate, remove the bushing, and
slide the coupling off the shaft. Remove the shaft
key (3).
It is not necessary to remove the outer ring of the
coupling from the engine flywheel unless the cou­