Gorman-Rupp Pumps VG6E3-B 1238969 and up - Manual (Page 28)

OM−02818 VG SERIES
MAINTENANCE & REPAIR PAGE E − 8
Slide the seal plate, shaft sleeve and seal assembly
onto the shaft. Secure the seal plate to the bearing
housing with the nuts (15).
Impeller Installation
Inspect the impeller, and replace it if cracked or
badly worn. Install the impeller key (46) and slide
the impeller onto the shaft and against the sleeve
until both are fully seated. Install the impeller nut
(47).
Install the seal plate gasket (10). Slide the pump
casing (1) over the impeller and secure it to the seal
plate with the nuts (13).
Replace any leveling shims used under the casing
mounting feet and install the hardware securing
the casing and bearing housing foot to the base.
Remove the wood block supporting the bearing
housing.
Final Pump Assembly
Be sure the pump is secure to the base and power
source.
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.
Fill the pump casing with clean liquid. Reinstall the
fill plug (49) and tighten it. Refer to OPERATION,
Section C, before putting the pump back into serv-
ice.
LUBRICATION
Seal Assembly
The seal assembly is lubricated by the medium be-
ing pumped and no additional lubrication is re-
quired.
Bearings
The bearing housing was fully lubricated when
shipped from the factory. Check the oil level regu-
larly through the sight gauge (36)
and maintain it at
the middle of the gauge. When lubrication is re-
quired, add SAE No. 30 non-detergent
oil through
the oil inlet plug opening (21). Do not over-lubri-
cate. Over-lubrication can cause the bearings to
over-heat, resulting in premature bearing failure.
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.
Power Source
Consult the literature supplied with the power
source, or contact your local power source repre-
sentative.