Question about Itw Devilbiss Itw Paslode Cnp 65Y Coil Nailer

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Paslode im350 piston will not return

After firing the shaft that drives the nails will not slide back into position (ready for the next nail) without being pushed back up.  this is a pain in the neck. does anyone have any ideas?

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  • patrick50892 Jan 30, 2009

    the problem was not the piston ring but the o-ring at the top of the chamber. whilst not broken a part of it was damaged, allowing exhaust gas, that should have pushed the piston back up, to escape from the top 

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It sounds as if the piston o ring is worn. Does the piston drop if you just give it a slight bump with no nails in the magazine, if so that is the problem and would need replaced. Let me know otherwise and I will dig deeper

Posted on Jan 27, 2009

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Having problem with im350 nailer where the piston arm doesn't retract fully back to let nails fall down to fire one. Gun is clean and all other parts work fine. Also o rings have been changed. Can you...


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You need to check for spark. With no nail or gas in it. Take of main cylinder(4bolts on top, 2 bolts on nose. And then put in battery. And then push upper switch(behind roller at top) and the fan will come on. And then pull the trigger. You should have spark.
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1 Answer

Paslode im350


Stuart - this sounds like an air problem - you should perform the following test. With the air nailer close to the compressor you must monitor the airpressure after the gun fires. it sounds like the air is not gettting through diapram fast enough or there is a blockage in line. Blockage in line is not suspected for the following reason . It sounds like the air hose is holding enough air to fire 2-4 nails and then you must wait for the line to fill up again and then it fires ok. The pressure regulator out to the line controls this and they do fail. try this test and report back to me - I know I can solve this for you as I have extensive background in compressor and the like.

Oct 22, 2008 | Itw Devilbiss Itw Paslode Cnp 65Y Coil...

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