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Disassemble Gun for Needle/Housing Replacement

3:13
9:19
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At 3:13 in

How to clean & rebuild a Graco Contractor II gun. Graco Sprayer Tips.

What happens here

For a full rebuild, typically done every two years or if paint starts seeping from the needle, begin by attaching a crescent wrench to the front part of the gun. Before unscrewing anything, it's crucial to squeeze and hold the trigger down firmly. If the trigger is not held down, the needle can scar the new housing when reassembled. While holding the trigger, use the crescent wrench to unscrew the front part of the gun. This exposes the needle. Then, release the back of the gun where the spring is housed. Unscrew the back part using the crescent wrench to release the tension from the spring. Carefully remove the spring. At this point, the needle will be exposed from both sides.

Goal: Prepare the gun for replacing internal components like the needle and O-rings

Tools and materials

  • Adjustable Crescent WrenchLoosening and tightening the gun's housing parts

What they say

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you clean that filter. Another thing you want to do with this gun, I about every 2 years I take the guns apart and clean them. If the guns are running fine, I don't ever want to take and clean take the actual gun itself apart and take the needle out cuz what's uh not broken. Don't attempt to fix it cuz they invariably will leak out the needle when you start messing with them. But eventually you'll start to get a little bit of paint start seeping out that needle and because the needle begins to wear out or get scars on it. And so to replace replace the gun housing or replace the needle, it's really important you start off you got to have a crescent wrench. And then you want to start off by squeezing this trigger. If you don't squeeze this trigger, if you're just taking it apart to clean it, you'll ruin that housing. When you put the new housing in, you could scar that the new seat by screwing this back on if you're not pulling the trigger. Very important. Pull the trigger. Hold the trigger down. Now I'm going to just attach a crescent wrench onto the front of the gun. right there. And then I release that. I'm still holding the trigger down tightly. Once I pull this off, now the needle is exposed. I can release the trigger. You can see the needle inside there. And that's the that little balls. That's what stops the paint from coming out of the gun. When you pull the trigger, it allows paint to go through. You release the trigger, it stops. And it's seating inside this thing. There's a little rubber O-ring on there. And that O-ring, when you're uh servicing this gun, it's a good idea to just put a new O-ring on there. So, now I got the needle exposed. There's the back of the gun. You're going to just release the back of the gun. This is where the spring is housed. And I'm going to release the back of this thing here. Unscrew it. And this is what gives you your tension on your trigger. um that gives the trigger the the tension to squeeze. It makes it hard to squeeze. So, you can release that and there's your spring. The spring comes out. Now, the needle is exposed on both sides.

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