6
307–959
MAINTENANCE
Thorough flushing and proper maintenance are es-
sential to keep your system working properly!
Improper flushing or maintenance may prevent the
system from working the next time you need it, and
may result in costly damage to the system.
ALWAYS flush your system thoroughly and imme-
diately after each use.
ALWAYS drain all water out of the spray valve and
extension and leave the system filled with mineral
spirits to prevent corrosion.
CAUTION
NOTE:
A power flush Adapter, Graco part no. 220–331,
can be used if you are using penetrating or lock-
down encapsulants. This accessory is placed at
the pump inlet and uses a standard city water
supply to aid in flushing. See
ACCESSORIES
,
page 18, to order. Instructions on hose to use it
are included with the adapter.
Flushing
(Non–oil based materials only)
1. Turn the switch to OFF.
2. Place the suction tube in the pail of warm soapy
water. Hold the spray wand over the material pail.
Turn on the system and. T rigger the spray valve to
drain and save the material in the hoses.
Release the
trigger. Shut the pump off just as soon as all material
is drained, to avoid contaminating the material with
the flushing water.
3. Hold the spray wand over the flushing pail. Turn on
the pump and trigger the spray valve. Circulate the
solution for three to five minutes (five to ten minutes
if it is cold).Then open the priming valve for a few sec-
onds to clean the priming tube. Close the valve.
4. Raise the suction tube above the water and run the
pump for a few seconds to drain the flushing solution.
Shut off the pump.
5. Wash off all external parts of the hoses, spray wand,
spray valve and pump.
6. Using clean water, flush again. Changing water as
often as necessary until the system is thoroughly
cleaned.
7. Finally, flush the system with clean mineral spirits for
just a few seconds. Open the priming valve and turn
off the pump. Some mineral spirits must be left in the
system to prevent corrosion.
8. Oil the needle in the spray valve and trigger the valve
a few times to distribute the oil. See Fig 3.
Fig 3
OIL
REGULARLY
SPRAY
VALVE
Never leave water or water–based material (latex)
in the system. To protect the pump from freezing
and to prevent corrosion in the pump, spray valve
and spray wand, your final flush must be mineral
spirits.
CAUTION
Flushing
(Oil–based materials only)
NOTE:
Follow the instructions above except use mineral
spirits.
Do not heat the mineral spirits.
TROUBLESHOOTING GUIDE
Pressure Relief Procedure
To reduce the risk of serious bodily injury, including
injury from moving parts or electric shock, always
follow this procedure whenever you shut of f the
system, when checking or servicing any part of the
system, and whenever you stop spraying.
1. Turn the ON/OFF switch to OFF.
2. Unplug the power supply cord.
3. Trigger the roller valve to relieve pressure.
If you suspect that pressure is not fully relieved af-
ter following the steps above, open the priming
valve two turns counterclockwise.
WARNING
CAUTION
Thoroughly flush the system after each use to re-
duce down time and costly repair bills.
NOTE:
If you are not able to determine the cause of the
problem, or the problem and solution is not dis-
cussed in this chart, return the system to an
authorized service agency for repair.
