Gorman-Rupp Pumps PA6F60-4045T 1521221 and up - Manual (Page 43)

OM-06189 PA SERIES
MAINTENANCE & REPAIR PAGE E - 21
Check the clearance between the impeller wear
ring for scraping or binding and correct any before
putting the pump back into service.
Discharge Check Valve Assembly And
Installation
(Figure 3)
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
place the flapper.
Install the valve cap gasket and secure the cap with
the previously removed hardware.
Support the discharge check valve assembly (11)
using a sling and a suitable lifting device. Use the
previously remoed hardware to secure the dis­
charge check valve assembly and gasket to the
pump assembly (1).
Priming Chamber Assembly And Installation
(Figure 7)
If the priming chamber lid (8) was removed, make
sure all of the old adhesive is removed and install a
new linear O‐ring (8) using “3M Scotchgrip
No.847” or equivalent compound in the groove.
Secure the priming chamber lid and gasket with
the hardware (5 and 6).
Clean and inspect the components of the priming
valve (1). Inspect the linkage and ensure the orifice
button squarely engages the valve seat. Replace
the button if required.
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 priming valve gasket (4) and strainer
(10).
Lower the float into the priming chamber (9) and
secure the valve with the previously removed hard­
ware (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 (6, Figure
3). 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.
Bearings
(Figure 4)
The bearings were fully lubricated when shipped
from the factory. Lubricate the bearings after every
1,500 hours of service. To lubricate the bearings,
remove the plastic covers from the grease fittings
(10 and 16) and be sure the fitting and the end of
the grease gun are clean.