Cleansing your airless sprayer properly and after every spray job is of the utmost importance! Proper care and maintenance is what is going to make your paint sprayer last and work for you trouble free. Probably half our repair work is due to lack of and/or unsatisfactory cleaning.
These general how-to cleaning instructions apply to most Graco (piston pump) airless sprayers as well as many others with slight variations such as filter types and locations as well as brand-named parts. This way to Graco Magnum cleaning instructions.
Note: If flushing with water, flush again with mineral spirits or Pump Armor, but do not repeat 8. or 14. This leaves a protective coating in the system to help prevent freezing or corrosion.
If you want to see some pictures of paint sprayers that have not been taken care of, see The Airless Wall of Shame.