Gorman-Rupp Pumps PA12A60-B-6068H 1435345 and up - Manual (Page 49)

OM-06296 PA SERIES
MAINTENANCE & REPAIR PAGE E - 29
Install the suction head gasket (52). Position the
suction head over the studs (53) and secure it with
the hardware (14 and 15).
Turn the impeller shaft by hand and check for any
scraping or binding and correct it before putting
the pump into service.
Discharge Check Valve Assembly and
Installation
(Figure 4)
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 (5)
using a sling and a suitable lifting device. Secure
the discharge check valve assembly and gasket
(6) to the pump assembly (1) using the hardware
(2, 3 and 4).
See Figure 1 and secure the check valve to the
check valve support bracket (17) with the previous­
ly removed hardware.
Priming Chamber Assembly And Installation
(Figure 8)
Clean and inspect the components of the priming
chamber (1). Inspect the linkage and ensure the
orifice button squarely engages the valve seat. Re­
place 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 chamber gasket
(4).
Lower the float into the priming chamber (5) and
secure the priming chamber with the previously re­
moved hardware (1 and 2).
(Figure 7)
Install the baffle (7) and gasket (8) and use a sling
and suitable lifting device to position the priming
chamber assembly against the pump suction
flange. Secure the priming chamber assembly with
the hardware (4 and 5).
Reconnect both the suction piping and the air dis­
charge tubing to the priming chamber assembly.
LUBRICATION
Seal Assembly
(Figure 6)
Fill the bottle oiler (54) and seal cavity with approxi­
mately 85 ounces (2,5 liters) of SAE No. 30 non‐de­
tergent oil. Check the oil level regularly and refill as
required.
Bearings
(Figure 6)
The pedestal was fully lubricated when shipped
from the factory. Check the oil level regularly
through the sight gauges (18)
and maintain it at the
midpoint of the gauges. When lubrication is re­
quired, remove the vented plug (19) and add SAE
No. 30 non‐detergent oil through the opening.
Clean and reinstall the vented plug. Do not over‐lu­
bricate. Over‐lubrication can cause the bearings to
over‐heat, resulting in premature bearing failure.
NOTE
The white reflector in the sight gauge must be posi­
tioned horizontally to provide proper drainage.
Under normal conditions, drain the bearing hous­
ing once each year and refill with approximately 14
ounces (0,4 liter) of clean oil. Change the oil more
frequently if the pump is operated continuously or