Gorman-Rupp Pumps 12B2-B 723756 and up - Manual (Page 34)

OM-00575 10 SERIES
MAINTENANCE & REPAIR PAGE E - 11
If a lifting eye was used to move the pump casing,
be sure to remove the lifting eye from the pump
casing.
Be sure the pump and power source have been
properly lubricated, see LUBRICATION.
Fill the pump casing with clean liquid. Reinstall the
fill plug (5) and tighten it.
Refer to OPERATION, Section C, before putting
the pump back into service.
LUBRICATION
Seal Assembly
(Figures 1 and 4)
Fill the grease cup (11) through the grease fitting
with No. 2 lithium base grease until grease es­
capes from the relief hole. Turn the grease cup arm
counterclockwise until it is at the top of the stem;
this will release the spring to apply grease to the
seal (see Figure 4).
GREASE
FITTING
CROSS
ARM
POSITION
WHEN
EMPTY
POSITION
FOR
FILLING
POSITION
WHEN
IN USE
RELIEF
HOLE
Figure 4. Automatic Lubricating Grease Cup
Bearings
The pedestal was fully lubricated when shipped
from the factory. Check the oil level regularly
through the sight gauge (27) and maintain it at the
middle of the gauge. When lubrication is required,
add SAE No. 30 non‐detergent oil through the hole
for the air vent (15). Do not over‐lubricate. Over‐lu­
brication can cause the bearings to over‐heat, re­
sulting in premature bearing failure.
Under normal conditions, drain the pedestal once
each year and refill with clean oil to the middle of
the sight gauge. Change the oil more frequently if
the pump is operated continuously 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.