Gorman-Rupp Pumps U4A60S-B 1289519 and up - Manual (Page 39)

OM-05665 SUPER U SERIES
MAINTENANCE & REPAIR PAGE E - 15
Periodically, the valve should be removed for in­
spection and cleaning. When reinstalling the relief
valve, apply `Loctite Pipe Sealant With Teflon No.
592', or equivalent compound, on the relief valve
threads. Position the valve as shown in Figure 1
with the discharge port pointing down.
Final Pump Assembly
(Figure 1)
If the discharge flange (7) or blind flange assembly
(37) were removed, replace the respective gaskets
(6 and 43). Apply `Permatex Aviation No. 3 Form‐A‐
Gasket' or equivalent to the mating surfaces, and
secure the flanges to the pump casing (1) with the
attaching hardware (4, 5, 41 and 42).
NOTE
There is a threaded passage through the interior
wall of the pump casing just in front of the blind
flange assembly. This passage is designed to
equalize pressure in the casing when the pump is
in operation, and must be kept clear.
Secure the extension pipe assembly (31) to the
suction back cover (27) using the coupling (34).
Install the shaft key (17, Figure 2) and reconnect
the power source. Be sure to install any guards
used over the rotating members.
Do not operate the pump without the
guards in place over the rotating parts.
Exposed rotating parts can catch cloth­
ing, fingers, or tools, causing severe in­
jury to personnel.
Install the suction and discharge lines and open all
valves. Make certain that all piping connections are
tight, properly supported and secure.
Be sure the pump and power source have been
properly lubricated, see LUBRICATION.
Remove the fill cover assembly (46) and fill the
pump casing with clean liquid. Reinstall the fill
cover and tighten it. Refer to OPERATION, Section
C, before putting the pump back into service.
LUBRICATION
Seal Assembly
(Figure 2)
Before starting the pump, remove the vented plug
(9) and fill the seal cavity with approximately 40
ounces (1,2 liters) SAE No. 30 non‐detergent oil to
the middle of the sight gauge (18)
and maintain it at
the middle of the gauge. Clean and reinstall the
vented plug. Maintain the oil at this level.
NOTE
The white reflector in the sight gauge must be posi­
tioned horizontally to provide proper drainage.
Bearings
(Figure 2)
The bearing housing was fully lubricated when
shipped from the factory. Check the oil level regu­
larly through the sight gauge (18A)
and maintain it
at the middle of the gauge. When lubrication is re­
quired, add SAE No. 30 non‐detergent
oil through
the hole for the air vent (10). 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 approximately 10
ounces (0,3 liter) clean oil. Change the oil more fre­
quently if the pump is operated continuously or in­
stalled 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.