Graco DutyMax DH230 HD Operation, Parts page 28

Clean Up
6. Move gun to waste pail, hold gun against
pail, trigger gun to thoroughly flush
system. Release trigger and engage
trigger lock.
7. While continuing to trigger gun, turn
prime valve down. Then release gun
trigger. Allow flushing fluid to circulate
until fluid comes out of drain tube clear.
8. Raise displacement pump above
flushing fluid and run sprayer for 15 to 30
seconds to drain fluid. Turn hydraulic
valve OFF. Turn engine OFF or turn
electric motor OFF and unplug.
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9. Engage trigger lock. Remove filters from
gun and sprayer, if installed. Clean and
inspect. Reinstall filters.
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10. Unscrew and remove inlet strainer.
Clean and replace strainer if necessary.
11. If flushing with water, flush again with
mineral spirits, or Pump Armor, to leave
a protective coating to prevent freezing
or corrosion.
12. Wipe sprayer, hose and gun with a rag
soaked in water or mineral spirits.
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