$4.30
Part 117490 is the check valve spring for the Graco Fusion AP and Fusion PC spray guns. Graco's service manual lists it as a spring and the exploded diagram labels it "Spring", while the Graco Partner Portal identifies it specifically as the check valve spring.
It is a small, low-cost item that sits inside an assembly you only reach during a strip-down, which is exactly why it is worth having one in the kit before you start. If a check valve is not behaving as it should, the spring is one of the parts to inspect while everything is open.
The Fusion guns use several different springs, so order by part number. Genuine Graco OEM part 117490.
