GORMAN-RUPP PA4C60-4045H, Инструкция по установке, эксплуатации и обслуживанию

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OM−06078 PA SERIES
MAINTENANCE & REPAIR PAGE E − 21
pump casing opening. Use the capscrews (45) to
press the suction cover into the pump casing until
fully seated.
Check the clearance between the impeller and the
wear ring for scraping or binding and correct any
before putting the pump back into service.
(Figure 3)
If the suction spool (5) was removed, install a new
gasket (2) and use a suitable lifting device to posi-
tion the suction spool against the pump suction
cover. Secure the spool to the pump with the pre-
viously removed hardware (3 and 4).
Discharge Check Valve Assembly And
Installation
(Figure 3)
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 and O-ring. Separate the valve cover and re-
place the flapper.
Install the valve cover O-ring and secure the cover
with the previously removed hardware.
Support the discharge check valve assembly (7)
using a sling and a suitable lifting device. Use the
previously removed hardware to secure the dis-
charge check valve assembly and gasket to the
pump assembly (1).
Priming Chamber Assembly And Installation
(Figure 7)
Clean and inspect the components of the priming
valve (1). Inspect the linkage and ensure the orifice
button (not shown) squarely engages the valve
seat. Replace the orifice button if required (see
Priming Chamber Removal and Disassembly
for orifice button removal).
If the orifice button was removed, screw the new
orifice button into the linkage bar until fully seated.
Align the hole in the linkage bar with the holes in the
bracket and reinstall the pivot pin. Secure the pivot
pin with the previously removed e-clip".
Adjust the orifice button seating as necessary by
screwing the orifice button into or out of the linkage
bar. Proper adjustment is achieved when the ori-
fice button fully seats against the orifice before the
linkage bar on the float bottoms against the
threads on the orifice button. When adjustment is
complete, install and tighten the lock washer and
hex nut securing the orifice button.
Install the strainer (6) and priming valve gasket (4).
Lower the float into the priming chamber (5) and
secure the priming valve with the previously re-
moved hardware (2 and 3).
(Figure 6)
Install the baffle (9) and gasket (8) and use a sling
and suitable lifting device to position the priming
chamber assembly on the hopper spool (not
shown). Secure the priming chamber assembly
with the hardware (6 and 7).
Reconnect the suction piping to the hopper spool
and the air discharge tubing to the priming cham-
ber assembly.
LUBRICATION
Seal Assembly
(Figure 4)
Check the oil level regularly at the sight gauge on
the seal oil reservoir and maintain it at the top of the
gauge. When lubrication is required, remove the
breather on top of the reservoir and add
synthetic
oil of an ISO viscosity grade 22 or lower.
Under normal conditions, drain the seal cavity and
reservoir every 1000 hours or once each year,
whichever comes first, and refill with clean oil.
Change the oil more frequently if the pump is oper-
ated continuously or installed in an environment
with rapid temperature change.
When adding oil after draining, or if the oil in the
reservoir has dropped below the sight gauge, air
must be purged out of the upper circulation hose to
prevent vapor locking. To accomplish this, discon-
nect the upper hose from the oil reservoir and hold
the hose below its point of entry in the seal cavity.
Fill the reservoir until the oil begins to run from the
hose, then reconnect the hose to the oil reservoir.