Gorman-Rupp Pumps PAH3B60-4045H 1493144 and up - Manual (Page 48)

OM-06474 PAH SERIES
MAINTENANCE & REPAIR PAGE E - 25
support bracket using the previously removed
hardware.
Priming Chamber Assembly And Installation
(Figure 8)
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 7)
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
(7, Figure 4). 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 6)
Before starting the pump, remove the air vent and
bushing (11 and 12) and fill the seal cavity with
approximately 170 ounces (5 liters) of SAE No. 30
non‐detergent oil to the center of the sight
gauge(s) (9). Clean and reinstall the air vent and
bushing. Check the oil level regularly and maintain
it at the middle of the sight gauge.
Bearings
(Figure 6)
The pedestal was fully lubricated when shipped
from the factory. Check the oil level regularly
through the sight gauge(s) (9A)
and maintain it at
the midpoint of the gauge(s). When lubrication is
required, remove one of the pipe plugs (15) and
add SAE No. 30 non‐detergent oil through the
opening. When lubricating a dry (overhauled) ped­
estal, fill the pedestal with approximately 50
ounces (1,5 liters). Clean and reinstall the fill plug.
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 pedestal once
each year and refill with clean oil. Change the oil
more frequently if the pump is operated continu­
ously or installed in an environment with rapid tem­
perature 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.