Question about Porter Cable RN175 Roofing Coil Nailer

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Air goes thru my Porter Cable RN175 and out the muffler

When I hook my Porter Cable RN175 Coil Roof Gun to a compressor hose the air just goes thru the gun and out the muffler. Does this sound like an o-ring gave out, if so is it a certain ring or should I just replace all of them???

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I would replace them all. Check the inlet Valve/fitting too.

Posted on Feb 03, 2010

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1 Answer

My check valve hose gets very hot, I saw a question, what is meant by regulated pressure?


  1. The regulated pressure is at the output of the pressure regulator i/e the air pressure being delivered to the air tool or spray gun.
  2. This can be set from just a few PSI up to about 180 PSI (on my Porter Cable unit).

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My porter cable roofing nailer rn175 type 1 it fire's and the rod stayed out and air comes out what part do I need to fix


Could have check valve out of place or broken. Easy to check. Remove head and pull out the cylinder and the round cylinder spacer. Look for black band that should have been covering small holes just below the cylinder spacer. Replace band if broken or if good install the cylinder ring on the cylinder then install the band and finally reinstall the assembly into gun. Look for any broken/cracked parts in the head of the gun. Good luck

Aug 28, 2013 | Porter Cable RN175 Roofing Coil Nailer

1 Answer

Roofing coil nailer will not advance nails


The feeder piston should be very hard to retract by hand and should move back and forth as quickly as driver piston moves. With nails removed and side door open, activate gun on rubber surface (old coiled up air hose or water hose ) and make sure driver and feeder move quickly. If not check for debris within feed piston or air passage to feedpiston. The spring straddles the feeder with the slightly bent part of the spring arms contacting the upper surface of the feeder (little grooves cut into feeder). When installed correctly, the tip of the spring arms will be pointing upwards and the back part of the spring between the two loops will be contacting the feeder shaft. Good luck.

Jun 25, 2013 | Porter Cable Air Tools & Compressors

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How to remove muffler intake from Porter Cable CPF6020-1 air compressor


To remove the air filter intake muffle you will need to remove the 4 screws that hold the head on to the pump.
There is a O-ring under the head you will want to put a little vasoline on before you reassemble the head back to the pump.

The new muffler kit should be the KK-4981

kk-4981_1.jpg

Sep 10, 2012 | Porter Cable Air Tools & Compressors

1 Answer

Using a Porter Cable RN175A and it stopped working.


for technical service (888) 848-5175

866-375-6287 their number

http://www.ereplacementparts.com/porter-cable-rn175-type-roofing-nailer-parts-c-129_1658_1660.html

Sep 06, 2012 | Porter Cable RN175 Roofing Coil Nailer

1 Answer

I have a porter cable double stack 150psi air compressor that will run then shut off when it is suppose to but no pressure on the regulator guage and no air will come out the hose when you hook up to


Make sure the regulator is working and set to the desired pressure. There should be a knob and guage showing the pressure. It may also be a bad compressor.

Aug 03, 2012 | Porter Cable Air Tools & Compressors

1 Answer

My RN175 shoots you think it shot the nail, but when you move the gun to shoot the next nail the nail you just shot falls out the end of the gun. What could cause this?


The driver is coming down far enough to break the nail off the strip but not far enough to drive it in. This could be caused by any of the following:
- The driver is broken off and too short to drive the nail
- The driver is bent and doesn't travel all the way down
- The seal/o-ring on the piston is damaged and air is leaking past it
Any of the above will require you to remove the head and inspect the driver, piston and o-rings or have a service center check it out.

Mar 07, 2012 | Porter Cable RN175 Roofing Coil Nailer

1 Answer

My RN 175 roofing nailer (porter cable) fires like a machine gun. I cleaned the trigger valve assembly and replaced the o-ring at top of the asembly. Still fires in high repetition.


With most nailers there is a safety device that has to be depressed as you press the gun against the work that is being nailed. This safety device might be damaged or jammed in the firing position allowing the gun to act like an automatic.

Mar 14, 2011 | Porter Cable RN175 Roofing Coil Nailer

1 Answer

I just found our old RN175 and wonder if I should and where it needs to be oiled before use?


put about 6 drops of air tool oil in the fitting and then plug in and shoot some nails to relube the o rings. Let me know if you need more assistance.

Nov 09, 2010 | Porter Cable RN175 Roofing Coil Nailer

1 Answer

Air is blowing from the top of the gun


Leaking from top is usually caused by the upper bumper (part #886113). This vinyl part will begin to crack/crumble causing improper seal. Order bumper only or overhaul kit #903789 that replaces most parts in gun. Order from www.toolpartsdirect.com. Good luck

Sep 18, 2010 | Porter Cable RN175 Roofing Coil Nailer

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