Question about Ingersoll Rand 3/4" Super Duty Extended Anvil Air Impact Wrench

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IR 261 air wrench vanes sticking

I use IR 261 guns. We tighten 1000 1/2" bolts a day per gun. I cannot keep a gun running for more than a few days before the vanes stick into the rotor and you can't get the gun to start. It just puffs air. I'm running 100-120 psi, filter, oiler. I have put in new vanes, have run them dry, wet, very wet, and have tried every combination possible. We even buy new guns that only last a few weeks before they start doing the same thing. I have also had the same problem with 271 guns. I'm at my wits end!

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  • joebob101 Feb 26, 2009

    Thanks for your suggestions. I'm going to try them. I do have clean air (filter/drier) and an in-line mister. I changed the air pressure to 90 psi per factory reccomendations. The comment you made about the vanes absorbing oil was interesting. When I have the problem, a few vanes always seem a little tight in the rotor. I use limited oil, but ususally am pretty liberal with the oil during assembly. I might be getting oil absorbtion problems on those fiber vanes. I found a place yesterday that makes polycarbonate vanes and have ordered some of them to try. I'm using this big gun because it drives the nuts much faster than a 1/2" wrench. We have it suspended from the ceiling with a tool balancer so the weight isn't a factor.



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NOT exactly a solution, but may help you with your problem: I'm also a Owner of a 261 ( In fact 90% 0f all my Air Tools are IR) that I used everyday when I was working on Terex Equipment & EMD Locomotives. I "Upgraded" the Major Parts inside my Gun to the "Industrial Line" rather than the Automotive Parts since the 261 is classified as a Automotive Tool..and Installing an Adjustable Regulator on the Gun Helped a Lot "tweeking" my Gun out, I was Pumping almost as much torque as some of the 1" Guns...
FYI: Don't Over Oil as the Oil will absorb into the Vanes, causing them to Expand in thickness "Permanently"...just 2-3 drops of a Hi-Grade Air Tool Oil before starting the Day is enough...sounds to me like your Picking up some contamination someplace??

Posted on Feb 21, 2009

  • Rick Wymer
    Rick Wymer Feb 26, 2009

    I checked with my Local Authorized IR Repair Center about your Problem. We both agreed that you should install new Vanes(make sure to Wash Out the Parts with Hi-Grade Clean Solvent & Air-Dry), making sure the work area is completely Dust free when you put it back together. Just 2-3 "Drops" of a Hi-Grade Air Tool Lube every 2-3 Hours of Use is Plenty, But a Compressor In-Line Mister is a Superior remedy to adding Lube.
    You didn't say "IF" your Compressor(Main-Line) has a Oil/Lube Mister In-Line??
    Are you getting Condensation in Your Main Supply Line, may want to add a Air Dryer if Not.
    "Auto-Drain" on your Compressor?? I run Auto-Drains on the Compressor Main Drain & on my Main Regulator.
    At the End of a Day of Use:
    I Like to Add a Couple of Drops of Lube, and Run the Gun in Forward and Reverse a Few times (No-Load), before putting it away....
    Hope this Helps You!
    If your ONLY doing 1/2" Bolts(?) won't a 244 work for You, 261 seems a Little Heavy Duty for that



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1. Spray W-D 40 or a similar oil into the impact, while you are holding the trigger down. Give it a good shot. Connect the hose and pull the trigger. Tap the sides of the gun with a plastic hammer to help free up the vanes. Repeat. Normally, this is enough to get you back running.
2. Place it in a bucket and cover the gun with W-D 40. Work the anvil end and trigger to work the oil deep into the gun. Ley it soak 1 hour, and repeat the process, working the oil in, and the air out. Remove it from the oil, and drain the oil back into the bucket by holding the trigger down. Hook up the air, and blow it out.
3. Remove the cover on the head that covers the vanes. Make sure that the vanes will slide freely, and that all gaskets and "O" rings are in good condition. If you note any dry areas in the inner parts of the impact, lubricate with W-D 40, and reassemble.
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