Question about Binks Model 7 Conventional Suction Feed Spray Gun, 1.8mm Tip

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Delivers the product but has a pulsating spray Binks Model 7

Delivers the product but has a pulsating spray resulting in a surface that is not uniform. I was spraying lacquer( before there was a urethane) and it was working perfectly. I couldn't keep my hands off of it. I thought it was working well if I get it rebuilt it will work even better. Wrong. My first real experience at being brain dead. I had it rebuilt at a local business that specializes in spray gun systems. They told me I should leave it alone. They were right. It hasn't worked well since. Sent it to a binks guy in Philadelphia. No luck there either. Years later and I still use it on occasion. works well on a small area. Bought a rebuild kit but not sure if I have the correct tools to do it or if it will even help. Trash time or what. Thank you.

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There is actually very little in the gun in the way of parts. The outer front nozzle unscrews, then the inner nozzle (you need a thin open-end wrench). The fluid and air controls unscrew from the back with loose springs. The fluid needle pushes out the back and the air valve unscrews from the front side of the handle (you may need to remove the trigger to get the valve out). The only critical area is outer and inner passages of the two front components. Soak the entire gun and parts in gun cleaner for an hour or two, then blow everything clean with compressed air. Lightly lube the trigger bearing, fluid needle (not the thin part), and air valve assembly. Put a little light grease on the threads of the two controls and their springs. Don't oil anything around the nozzle. Hopefully, you found a wad of paint in the gun body after soaking it. After reassembly, check the air flow first which should not pulsate. If it does, check the air line with a blow gun--does it pulsate? Check the regulator, hose, and air filter if it does. If the air delivery is good but the gun still pulsates while painting, check the paint supply system. Hope this saves the gun--I've had a Binks gun for many years and it was well used before I got it.

Posted on Oct 08, 2009


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