Gorman-Rupp Pumps PAH6B60-6068H 1507875 and up - Manual (Page 38)

PAH SERIES OM-06451
MAINTENANCE & REPAIR PAGE E - 16
can occur if proper lifting procedures
are not observed. Make certain that
hoists, chains, slings or cables are in
good working condition and of suffi­
cient capacity and that they are posi­
tioned so that loads will be balanced
and the pump or components will not be
damaged when lifting. Suction and dis­
charge hoses and piping must be re­
moved from the pump before lifting. Lift
the pump or component only as high as
necessary and keep personnel away
from suspended objects.
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
(2, Figure 3). Support the priming chamber assem­
bly using a sling and a suitable lifting device. Re­
move the hardware (6 and 7) and separate the
priming chamber assembly, gasket (8) and baffle
(9) from the spool (7, Figure 3).
(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 (12)
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.
Suction Head and Wear Ring Removal
(Figure 4)
The wear ring (10) is easily accessible and may be
serviced by removing the suction head (2). Before
attempting to service the pump, remove the lower­
most pipe plug (5) from the pump casing drain the
pump. Clean and reinstall the drain plug.
It is not necessary to remove the suction spool (7,
Figure 3) from the suction head unless replace­
ment of the spool, gasket (4, Figure 3) or suction
head is required. To remove the suction spool, dis­
engage the hardware (5 and 6, Figure 3) securing it
to the pump casing.
Remove the back cover nuts (16) and two diago­
nally opposing locking collars (13). Use the adjust­
ing screws (12) to press the suction head out of the
pump casing.
Remove and discard the O‐ring (3).
Inspect the wear ring and, if replacement is re­
quired, install two 3/4-10 UNC‐2B capscrews (not