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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, stop the pump at the bottom
of its stroke to prevent fluid from drying on the ex-
posed displacement rod and damaging the throat
packings. Relieve the pressure.
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
OR EXPLOSION HAZARD on page 4.
Be sure the entire system and flushing
pails are properly grounded. Refer to
Grounding on page 6.
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.
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.
Operation
To reduce the risk of serious injury whenever you
are instructed to relieve pressure, always follow the
Pressure Relief Procedure on page 9.
1. Relieve the pressure.
2. Remove the tip guard and spray tip from the gun.
See the gun instruction manual.
3. Place the suction tube (26) in a container of sol-
vent.
4. Close the return line valve (7).
5. Hold a metal part of the gun firmly to the side of
the grounded metal pail.
6. Start the pump. Always use the lowest possible
fluid pressure when flushing.
7. Trigger the gun.
8. Flush the system until clear solvent flows from the
gun.
9. Release the gun trigger and lock the trigger safety.
The pump should stall against pressure.
10. Place the return line tube (10) in a grounded metal
pail.
11. Open the return line valve (7) and flush the return
line until clear solvent flows from the return line
tube (10).
12. Relieve the pressure.
13. Clean the tip guard and spray tip separately, then
reinstall them.
14. Clean the inside and outside of the suction tube
(26) and return line tube (10).
WARNING
308081
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