Gorman-Rupp Pumps 81 1/2B2-B 259506 and up - Manual (Page 31)

80 SERIES OM−00744
MAINTENANCE & REPAIR PAGE E − 10
compound to the fill plug (33). Reinstall and tighten
the fill plug.
Refer to OPERATION, Section C, before putting
the pump back into service.
LUBRICATION
Seal Assembly
Fill the grease cup (7) 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
NOTE
Some smoking and leakage may occur after instal-
ling a new seal assembly. This should stop after the
pump has run a while and the lapped seal faces
have seated in.
Bearings
The pedestal was fully lubricated when shipped
from the factory. Under normal conditions, remove
the vented plug (13) and add three shots of No. 0
lithium base grease from a grease gun after each
250 hours of operation or once each month, which-
ever comes first. Do not over-lubricate. Over-lu-
brication will cause the bearings to over-heat, re-
sulting in premature bearing failure.
If grease is forced out around the shaft or
bearings as new grease is added, the
bearing cavity is full and should be disas-
sembled and cleaned immediately.
After lubrication, clean and reinstall the vented
plug.
There are no provisions in the bearing cavity to
drain or flush the lubricant. The pump and pedestal
must be disassembled to completely clean and
maintain this cavity.
Under normal conditions, change the grease after
each 5000 hours of operation, or at 12 month inter-
vals, whichever comes first. Change the grease
more frequently if the pump is operated continu-