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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  • 32 Answers

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 too...by "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

    Follow-Up:
    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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244a Ingersoll rand impact gun


Yup, there is a procedure for that.
1. Use a good penetrating lubricant and soak well.
2. Make sure the motor cylinder (item #22) is installed and pressing against the rear endplate (item# 27), this will keep it straight while attempting to pull the rotor from the motor housing.
3. Grab a set of Vise Grip pliers, lock on to the end of the rotor. Tip install the hammer case screws, thread them all the way down the will give you a place to tap with a hammer and not damage the housing. Depending how old or how beat up you tool is you might have to slightly heat the housing with a propane torch to expand the housing, only do this as a last resort.
Ideally it should slide right out.
Follow this link for a parts list:
http://manualarchive.ingersollrandproducts.com/ir_pdfs/Tools/Vehicle%20Service%20Tools/Air%20Impact%20Tools/16578791_ed2.pdf

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The problem stated could be in one of two places.
1st the hammer mechanism, symptom when trying to loosen or tighten a nut the tool locks up. Disassemble and and check components for wear or broken parts..
2nd under a no load condition, depressing the trigger and only air blows through the exhaust could be a combination of hammer and motor. Also must inspect the anvil bushing (item #19) located in the hammer case, they have a tendency to slide out of place and binding the mechanism as a whole, then check air motor for scarred a
endplate (item # 12) cylinder (item# 9, damaged vanes (item# 11)
Follow this link to the parts list. http://manualarchive.ingersollrandproducts.com/ir_pdfs/Tools/Vehicle%20Service%20Tools/Air%20Impact%20Tools/45534070_ed3.pdf

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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.
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