Gorman-Rupp Pumps PA6C60C-B-E50 460/3 1528569 and up - Manual (Page 41)

PA SERIES OM-06531
MAINTENANCE & REPAIR PAGE E - 14
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 5)
Disconnect the air discharge tubing from the prim­
ing chamber assembly (2, Figure 2). Support the
priming chamber assembly using a sling and a
suitable lifting device. Remove the hardware (6
and 7) and separate the priming chamber assem­
bly (1), gasket (8) and baffle (9) from the pump cas­
ing.
(Figure 6)
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 2)
Support the discharge check valve assembly (26)
using a sling and a suitable lifting device. Remove
the hardware (not shown) securing the check valve
to the pump and separate the discharge 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 3)
The wear plate (20) is easily accessible and may be
serviced by removing the back cover plate assem­
bly (27). Before attempting to service the pump, re­
move the casing drain plug (8A) and drain the
pump casing. Clean and reinstall the drain plug.
Remove the back cover nuts (25) 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 (25) 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 (13 and19).
Inspect the wear plate and, if replacement is re­
quired, remove the hardware (21 and 22) securing
it to the back cover plate.
Draining Oil From Seal Cavity
(Figure 3)
If any further disassembly is to be performed on the
pump, the seal oil cavity must be drained to pre­
vent the oil in the seal cavity from escaping as the
pump casing is removed.
Position a, clean container (2 gallon [7,8 liter] mini­
mum) under the seal cavity drain plugs (8B, Figure