Gorman-Rupp Pumps PA4A60-4024T 1476457 and up - Manual (Page 46)

PA SERIES OM−06415
MAINTENANCE & REPAIR PAGE E − 24
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 and gasket (8 and 9) and use a
sling and suitable lifting device to position the prim-
ing chamber assembly on the pump suction spool
(6, Figure 3). Secure the priming chamber assem-
bly with the hardware (6 and 7).
Reconnect both the suction piping and the air dis-
charge tubing to the priming chamber assembly.
LUBRICATION
Seal Assembly
(Figure 5)
Before starting the pump, remove the vented plug
(8) and fill the seal cavity with approximately 5
quarts (4,7 liters) of SAE No. 30 non-detergent oil
or until the internal casting is covered. This can be
checked by inserting a screwdriver through the
vented plug opening until it bottoms out. Remove
the screwdriver and the tip should have just a little
oil on it. Clean and reinstall the vented plug. Main-
tain the oil level above the minimum oil level line in-
dicated by the decal on the pump casing.
Bearings
(Figure 5)
The bearing housing was fully lubricated when
shipped from the factory. Check the oil level regu-
larly through the sight gauge (22)
and maintain it at
the midpoint of the gauge. When lubrication is re-
quired, remove the air vent (10) and add SAE No.
30 non-detergent oil through the opening. When
lubricating a dry (overhauled) intermediate, fill the
bearing cavity with approximately 28 ounces (0,8
liter). Clean and reinstall the air vent. Do not over-
lubricate. 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 clean oil. Change
the oil more frequently if the pump is operated con-
tinuously or installed in an environment with rapid
temperature change.
Monitor the condition of the bearing lubri-
cant regularly for evidence of rust or mois-
ture condensation. This is especially im-
portant in areas where variable hot and
cold temperatures are common.
For cold weather operation, consult the factory or a
lubricant supplier for the recommended grade of
oil.
Engine
Consult the literature supplied with the engine, or
contact your local engine representative.