Question about Chicago Pneumatic 1/2" Air Impact Wrench

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Loaned impact wrench tried to use after returned will not stop rotating unless air is unplugged

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Typical ---get it serviced there is small platic type o/ring on trigger in the handle that gets brittle and breaks up,mine went just after easter ..make sure ,when fixed to add a few drops of transmission fluid to th e air inlet every time you useit

Posted on Jul 29, 2009


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Hi sureputtcup...

Try this solution:
Spray some WD40 into the air intake of the impact wrench and then hook up your air hose to the it a few seconds in forward....then after running in forwards for a few times, disconnect the wrench again, and again spray a small amount of WD40 into the air intake of the wrench...again run in forward...after running in forward again, then try to reverse the rotation...turn to reverse..
This will sometimes free up the vanes and sticky parts and allow the wrench to work properly.
If this does not work then you will need to disassemble the wrench and clean and oil and reassemble.
Please take time to rate me 4 thumbs up

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1 Answer

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Yes, if you take it apart you'll find that the trigger isn't allowing air to pass through to the veins of the impact wrench. It's a relatively simple mechanism, where maybe something is broken inside.

If it were blowing air but the veins were stuck, I would say, lubricate it. But, if no air goes through it at all, then the trigger housing houses the problem part.

Have you tried to disassemble the air wrench?

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1 Answer

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