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Lubrication
Lubricate the thrust bearing once a month if the pump
is operating continuously. To lubricate the bearing,
pump one or two shots (about 0.1 oz/2.8 grams) of
Chevron SRI/No. 2 NLGI grade grease through the
fitting on the top of the seal retainer. A 14 oz. tube of
this grease is supplied with the pump. See Fig. 3.
NOTE: Do not lubricate the bearing when you first
receive the pump as it is factory greased.
CAUTION
Use only Chevron SRI/No. 2 NLGI grade grease to
help prevent bearing overheating and premature
bearing failure. This green or brown-colored grease
is used for the factory pack and must not be mixed
with any other type of grease. The use of any other
type of grease will void the Graco Warranty.
CAUTION
Do not over grease the bearing, which may cause
the bearing to overheat. Remove any excess grease
after lubricating.
1
1
Grease here.
Fig. 3
Thrust Bearing Temperature Monitoring
The 3/8" npt plug (54) can be removed from the pump
base to install a temperature sensor to monitor thrust
bearing temperatures. This sensor can be purchased
from an appropriate outside supplier
Thrust Bearing. Once a month, lubricate the thrust
bearing if pump is run continuously. Refer to thrust
bearing Lubrication instructions on this page. It is
recommended that the Imperial pump thrust bearing
assembly be replaced at least once a year.
Pump Pressure, Flow, and Temperature. Once a
month, check the static discharge pressure, flow rate
of the pump, thrust bearing temperature, and coupler
clearance. Record them.
NOTE: If the operating temperature exceeds 150_ F
(65_ C) and normal maintenance, troubleshooting, and
service fails to reduce temperature, contact a qualified
Graco representative.
Blockage of the overflow tube and overflow chamber
on pump base will cause leakage through the shaft
seal and adjustment nut opening.
54
03122
3122B
Preventive
Maintenance
CAUTION
308060
9
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