Skip to main content

Internal Priming Diagnosis

1:49
17:01
133.7K views

At 1:49 in

Trouble Shooting Airless Paint Sprayers

What happens here

The presenter and John discuss the typical cause of an airless sprayer running but not building pressure: a stuck 'seat ball' inside the piston. They power on the sprayer, demonstrating that despite the motor running, no paint is flowing consistently from the prime tube when the prime knob is set to 'prime'. This confirms the lack of priming action and strengthens the suspicion of an internal blockage affecting the ball valve, preventing it from seating correctly and building pressure.

Goal: Confirm lack of priming and identify the suspected internal component (ball valve).

Tools and materials

  • Airless Sprayer — Used to demonstrate the priming failure

What they say

Hide

sprayer you got any thoughts John you know like you said you check if your paint is dirty that's going to give you some hints about what problems you're gonna be having typically if it's raining like that it's just running it's not building any pressure but there's a little seat ball inside the piston there if that's not seating all the way because there's a little piece of paint blocking it it's not going to build pressure but still run but it won't build pressure so one of the ways you can kind of start to figure that out too is does it crime or not so when you flip it over to Primus they're fluid coming out of that frying section and that's a good point that John brought up when I would crime and I would flip it over to crime there should be you know a constant steady flow of paint coming out of here in there was none I think we can power on and we can show you that John

Auto-generated from the video audio.