Gorman-Rupp Pumps PA4A60C-B-E30 575/3 1482736 and up - Manual (Page 41)

PA SERIES OM−06440
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 6)
Disconnect both the suction piping and the air dis-
charge tubing from the priming chamber assembly
(12, Figure 3). Support the priming chamber as-
sembly 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 suction spool (32, Figure 2).
(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 2)
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.
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 piping (16, 17 and
18). Remove the pipe cap (16) and drain the oil
from the seal cavity into the container. For shorter
drain time, remove the vented plug (10, Figure 5).
Clean and reinstall the pipe cap and vent plug. In-
spect the oil for water, dirt or a cloudy condition
which could indicate seal failure.
Separating Pump End From Power Source
(Figure 1)
Further disassembly of the pump requires separat-
ing the pump end from the power source. Discon-
nect the discharge piping from the pump casing.
Remove the hardware (2 and 3) securing the guard
(6) to the drive flange (18, Figure 4) and remove the
guard. Disconnect the hardware securing the
halves of the coupling (4) and separate the cou-
pling halves.
Use lifting and moving equipment in