Question about Porter Cable Cable 135 PSI, 15 Gal. Oil - Free Horizontal Compressor CPF4515

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I need a new piston ring for a 6 HP Porter Cable air complrssor. It is made of some sort of fiber or perhaps teflon like material. I made a leather one but it just did not last very long. the model number is CPF6025VP

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Do you know the meaning of each letter Do you know the meaning of each letter (RH or SH) in piston rings for a 6 HP Porter Cable air compressor

Posted on Jul 02, 2011

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The part number is DAC-308 and you can order the part from www.msservice.net or you can also try www.allpartsinc.com

You wont need new o-rings for the head just put a little grease on the o-rings and install them again.

Posted on Nov 07, 2010

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1 Answer

Air goes to only 60psi and keeps runnings


These non lubricated compressors have a "plastic" piston ring that eventually wears out. The ring is not available as an individual part. You need to purchase a piston and cylinder kit and possibly a new valve plate as well.

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Craftsman Air Comp. 6 hp oil-less, 33 gal horz. tank - sounds really loud


Sources of noise from craftsman oil free compressors (could be Made by Campbell Hausfeld or Porter Cable) include loose fan, failing bearing/s on the piston rod and housing, failing seal ring on piston, air filter intake and loose motor mounts. With the housing cover off, check the fan blade for cracks or loose screw. Turn motor by hand till the piston is at top of stroke. Examine the cylinder for scratches close to top. If scratched, air is leaking past vinyl ring making noise and causing longer fill time. If everything looks ok, suspect noise coming from bearings. Hard to tell if bearings are failing by looking at them. I have seen many failures of the piston bearing on the crank (fairly easy to change, I use alternator bearing from auto parts ) , however, the bearing in the housing just behind the crank bearing is much harder to replacable. Good luck with your fix-it project.

Jun 11, 2012 | Craftsman Air Tools & Compressors

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Compressor will only build up 60 PSI. What is wrong?


Diafram cracked/ split a little if piston type rings shot.

Feb 27, 2011 | Porter Cable C2002 150 Psi 6 Gal...

1 Answer

Will not build pressure past 40 psi


You have either damaged reed valves or piston ring. Both of which are common problems with this type of compressor. To diagnose: Remove the motor cover, then the four screws holding the cylinder head on. The valve plate is under the head and all eight reeds, five intake and three output, must be in very good condition to work properly. You'll need the valve plate, part number N017592, and head gasket, part number Z-D24819, if there are any damaged reed valves. If they're OK, check the piston ring. Remove the screw holding the piston on the flywheel and pull the con-rod out of the cylinder. The ring around the piston must be in perfect condition to build pressure. The connecting rod kit, part number KK-4964, is the only way to get the piston seal ring.

Jan 17, 2011 | Porter Cable C2002 150 Psi 6 Gal...

1 Answer

C2006 Type 4 Porter Cable will pump from 50# to 100# then will not pump any higher but will keep running.


This sounds like the piston ring is worn out and will not allow the unit to pump up to it's shut off pressure.

You can order the D30324 cylinder/ring kit and it should repair your problem.

You can order this at www.allpartsinc.com or go to www.msservice.net

Nov 06, 2010 | Porter Cable C2002 150 Psi 6 Gal...

1 Answer

Craftsman air compressor 1 HP 12 gal 125 psi


this is probably an "oilless" compressor, it has "piston" with a thin ring of leatherlike material acting as a piston ring, the "cylinder" is an aluminum sleeve - what usually happens is the cylinder gets scratched from dirt or just wear or the leather ring deteriorates, that's why it will go only so far - the only fix for this is to replace the cylinder and the piston

Aug 18, 2009 | Craftsman Air Tools & Compressors

2 Answers

Porter cable pancake unit blows air after shut off.


those have a reed valve set up you need to pull the head off and you will see two strips of metal that are usually held down with two small screws each the one on intake side most likely you could get a rebuild kit cheap it will only have new reed valves maybe new screws for them a leather ring and a head gasket

Mar 14, 2009 | Porter Cable 18 - Gauge Brad Nailer and...

2 Answers

Pressure won't build up in tank


Your compressor is the oilless type that incorporates a vinyl/teflon piston ring and a cylinder that is open from the bottom. Remove the cover and push the piston to upmost position. Look for scratches along the upper portion of cylinder. If scratched, compression is leaking thru ring and will not fill tank. Replace with Sears part #k0650 cylinder /piston ring kit to restore full power. While the compressor is apart examing the valve plate and reed valves for wear. If worn replace with part #z-ac-0032. Reed valves tend to crack or loose their shape reducing efficiency. If cylinder and ring are in fair condition, then most likely reed/valve plate is the problem. Good luck and email if you have more questions.

Feb 01, 2009 | Porter Cable 4 5 Gallons 150PSI Job Boss...

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