Gorman-Rupp Pumps 4D-B 461594 and up User Manual
Page 30
D SERIES
OM--01505
MAINTENANCE & REPAIR
PAGE E -- 16
Gearbox
(Figure 4)
The gearbox was fully lubricated when shipped
from the factory. Check the oil level regularly at the
oil cup (46), and keep the oil cup full. Lubricate with
SAE No. 30 non-detergent when lubrication is re-
quired.
Do not over-lubricate. Over-lubrication can
cause the bearings to overheat, resulting in prema-
ture bearing failure.
Under normal conditions, change the oil after each
5000 hours of operation, or at 12 month intervals,
whichever occurs first. Change the oil more fre-
quently if the pump if operated continuously or in-
stalled in a dirty or humid 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.
When lubricating a dry (or overhauled) gearbox,
add one ounce of ‘Molykote M Gear Guard’ and
‘top off’ with clean oil.
For cold weather operation, consult the factory or a
lubricant supplier for the recommended grade of
oil.
Motor
Refer to the motor manufacturer’s recommenda-
tions or contact your local motor representative.