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306981 11
Operation
Shutdown and Care of the Pump
WARNING
To reduce the risk of serious injury whenever you
are instructed to relieve pressure, always follow the
Pressure Relief Procedure on page 9.
For overnight shutdown, relieve the pressure. Always
stop the pump at the bottom of the stroke to prevent
the fluid from drying on the exposed displacement rod
and damaging the throat packings.
Always flush the pump before the fluid dries on the
displacement rod. See Flushing below.
Flushing
WARNING
FIRE AND EXPLOSION HAZARD
Before flushing, read the section FIRE
AND EXPLOSION HAZARD on page
4. Be sure the entire system and flush-
ing pails are properly grounded. Refer to
Grounding on page 5.
Flush the pump:
D Before the first use
D When changing colors or fluids
D Before fluid can dry or settle out in a dormant pump
(check the pot life of catalyzed fluids)
D Before storing the pump.
Flush with a fluid that is compatible with the fluid you
are pumping and with the wetted parts in your system.
Check with your fluid manufacturer or supplier for
recommended flushing fluids and flushing frequency.
If the pump is being used to supply a circulating sys-
tem, allow the solvent to circulate until the pump is
thoroughly flushed.
CAUTION
Never leave water or water-base fluid in the pump
overnight. If you are pumping water-base fluid, flush
with water first, then with a rust inhibitor such as
mineral spirits. Relieve the pressure, but leave the
rust inhibitor in the pump to protect the parts from
corrosion.
02501
Fig. 3
36
P
1
Torque to 18–20 ft–lb
(24–27 N.m)
1
Model 223586 Shown