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Porter Cable Pancake Compressor Piston Stuck

Joined
May 18, 2024
Messages
3
Cylinder is stuck in the head when I take it apart. How the heck am I supposed to get it out of there? I've tried soaking in wd40. will not twist out. Might have to remove the entire piston arm and pound it out in a vice.
 
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nadogail

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Joined
Jan 23, 2009
Messages
31,907
Location
Coronado, CA
WD-40 is a water displacer, It has some ability to penetrate but IMHO that is incidental.

ATF, mixed with Acetone has worked well as a penetrating solution.
 

WillyBoy

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Nov 10, 2021
Messages
634
Location
Genesee valley area of New York state
Yeah, what nadogail said. Some folks attribute too much to WD-40.
Over the counter penetrants that work pretty well: PB Blaster; Liquid wrench; Aerokroil.

If the piston has scuffed the cylinder wall, there may be some metal in the way.
 

wssix99

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Joined
Mar 2, 2011
Messages
5,155
Location
Chicago, IL
Those are made in China and have all sorts of non-serviceable parts on them. Something else on the unit is probably broken, which led to the issue. Are you actually trying to get it running again. $99.99 will buy you a new one.
 

strutaeng

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Joined
Dec 12, 2011
Messages
2,249
Location
Dallas, TX
If it's stuck because it actually failed, I think you should probably toss it. Those units are oiless, which means they eventually wear out and it's not worth fixing them.
 

finn

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Joined
Mar 27, 2005
Messages
16,187
Location
The UP, God's country
Scrap it. A new one is likely about the cost of parts to fix the one with the seized piston or broken rod.

if it still rotated, a new teflon ring might be worth it, but anything beyond that is a fools errand, as far as repairs.
 

knightfire83

Member
Joined
Mar 25, 2016
Messages
13
I bought one of those store brand oilless ultra quiet compressors for around the house things.
Pretty amazing how much air it puts out and you can barely tell it's running.

Similar to this one on YouTube:
The video makes it seem louder than it is in person.

 
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driftpin

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Joined
Dec 22, 2016
Messages
11,185
Location
Miami-Dade/Broward Co. Florida
I have an old version of the Politically Correct (PC: Porter Cable) which came with a pneumatic brad gun, to do work on remodeling the kitchen. It's pretty-loud! The scroll screw compressors are supposed to be the most-quiet, but I've never seen a side-by-side comparison. The PC compressor has outlasted the brad gun, which seems to have developed some fatal flaw in its operation, related to the piston and its O-ring. I tried to service the gun with a gen-yoo-wine PC O-ring but it still isn't going to work, w/o having to fuss with it in-between brad strikes. I did the HFT thing, and that brad gun works well.
 

nadogail

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Joined
Jan 23, 2009
Messages
31,907
Location
Coronado, CA
I bought one of those store brand oilless ultra quiet compressors for around the house things.
Pretty amazing how much air it puts out and you can barely tell it's running.

Similar to this one on YouTube:
The video makes it seem louder than it is in person.

 

onewheat

Well-known member
Joined
Feb 19, 2012
Messages
1,286
Location
Knoxville, TN
I've got a Porter Cable compressor and the Pressure Switch no longer works (it just runs until the blow-off pops) and a replacement is no longer available. It looks like I just took it out of the box though.
 

nadogail

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Joined
Jan 23, 2009
Messages
31,907
Location
Coronado, CA
Can you adapt another switch? I have had good luck when working on hydraulic equipment by replacing OEM pressure switches with Quality Generic replacements.
 
Last edited:

onewheat

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Joined
Feb 19, 2012
Messages
1,286
Location
Knoxville, TN
Can you adapt another switch? I have had good luck when working on hydraulic equipment by replacing OEM pressure switches with Quality Generic replacements.

I did find another that I could adapt - it was $35. A new compressor with a warranty is $100 and I have another, so I haven't been in a huge hurry to do anything just yet.
 
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