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Porter Cable Pancake Compressor Issue

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Forum topic by Matt Przybylski posted 01-03-2016 05:02 PM 602 views 0 times favorited 29 replies Add to Favorites Watch
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Matt Przybylski

528 posts in 1839 days


01-03-2016 05:02 PM

Hey everyone,
I don’t use my air compressor often as I don’t do that much air nailing but for the occasional task I turn it on and let it build up the pressure before use. The other day I needed to use my brad nailer so I turned it on and let it build up. It took longer than usual which I found curious and then all of a sudden it started to just release air (really loudly) and the pressure was going back down. Every time I turn it on now it eventually gets to around 145 PSI tank pressure and then starts to just let the air out of the safety valve.

Anyone have any ideas on what the issue may be?

-- Matt, Illinois, http://www.reintroducing.com


29 replies so far

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ohtimberwolf

634 posts in 1813 days


#1 posted 01-03-2016 05:06 PM

I would suspect a bad safety valve or it may be that something has infiltrated it. larry

-- Just a barn cat, now gone to cat heaven.

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Matt Przybylski

528 posts in 1839 days


#2 posted 01-03-2016 05:19 PM

It would be nice if it was just the safety valve but if I replace it and it doesn’t work it may also be the pressure switch from what I’m seeing online. I wish there was an easy way to tell which is the issue.

-- Matt, Illinois, http://www.reintroducing.com

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dhazelton

2324 posts in 1758 days


#3 posted 01-03-2016 06:31 PM

I would say the pressure switch is bad. Thank your stars the safety valve is good. Videos on youtube as to how to test it.

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MrUnix

4209 posts in 1660 days


#4 posted 01-03-2016 06:34 PM

I’m not seeing how it is the pressure switch since it’s cutting off close enough to rated pressure like it should. Try letting it pump up and shut off, then unplug the unit from the wall. At that point, it should be bleeding air out the safety valve as you mention… see where it stops bleeding air, if at all. Also verify that it’s the safety valve that is bleeding air and not a loose connection somewhere (like even where the safety valve screws into the regulator). Also, is that safety valve adjustable? Did you try pulling out the ring and pushing it back in (while under pressure) a few times in case there is a piece of debris or something keeping it from closing completely?

Cheers,
Brad

-- Brad in FL - To be old and wise, you must first be young and stupid

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dhazelton

2324 posts in 1758 days


#5 posted 01-03-2016 06:40 PM

Ah – my PC pancake has a 135 psi shutoff, so i assumed if it went beyond that the safety valve would take over. The Porter Cable is a good little unit (I see a lot of the Bostich’es in the scrap metal yard down the road from me). It may be what MrUnix says.

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teejk02

423 posts in 586 days


#6 posted 01-03-2016 06:52 PM



Ah – my PC pancake has a 135 psi shutoff, so i assumed if it went beyond that the safety valve would take over. The Porter Cable is a good little unit (I see a lot of the Bostich es in the scrap metal yard down the road from me). It may be what MrUnix says.

- dhazelton

That would be my guess also. The relief valve on my Bostiches is purely a mechanical thing designed to let off when pressure gets too high (not unlike that thing on your water heater). It might simply be dirty. Not so sure what I would use to clean it though…carb cleaner maybe? And then just “exercise” it a little.

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johnstoneb

2143 posts in 1634 days


#7 posted 01-03-2016 07:14 PM

It pumps to 145psi then safety valve opens. Either the pressure switch is out of adjustment or bad. The safety valve is doing its job.

-- Bruce, Boise, ID

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a1Jim

115202 posts in 3038 days


#8 posted 01-03-2016 07:19 PM

This compressor is notorious for having this problem ,I gave up on these after buying a couple that lasted a very short time.if it was me I wouldn’t spend any time or money trying to fix it.

-- http://artisticwoodstudio.com Custom furniture

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MrUnix

4209 posts in 1660 days


#9 posted 01-03-2016 07:26 PM

Ah – my PC pancake has a 135 psi shutoff…
- dhazelton

Either the pressure switch is out of adjustment or bad.
- johnstoneb

Yeah, I guess before anyone can make a conclusion about the pressure switch, Matt needs to let us know which one he has… The ones being sold now are 150psi models, some others, not…

Cheers,
Brad

-- Brad in FL - To be old and wise, you must first be young and stupid

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teejk02

423 posts in 586 days


#10 posted 01-03-2016 07:33 PM



This compressor is notorious for having this problem ,I gave up on these after buying a couple that lasted a very short time.if it was me I wouldn t spend any time or money trying to fix it.

- a1Jim

I dunno…I have two of the Bostich ones and have had no problems other than one was defective from the factory and was fixed under warranty. I keep one under my work table so I don’t have to trip over the hose from my larger one. I’m guessing it sat for awhile and the relief valve gummed up a little (had that happen with my larger one). Just a little “exercising” was all it took.

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dhazelton

2324 posts in 1758 days


#11 posted 01-03-2016 07:45 PM

The PC is the lightest, cheapest unit that will shoot a framing nail. I’ve had mine for ten years of handyman type use and it’s been great. I’d love a Makita but it weighs twice as much. That gets old when you move it around a lot or need to carry it upstairs. If mine died today I’d just go buy a new one tomorrow.

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a1Jim

115202 posts in 3038 days


#12 posted 01-03-2016 07:49 PM

We all have different experiences with tools I’m glad this type compressor has worked for You. I can’t help but wonder if a 10 year old unit might have be made in the USA

-- http://artisticwoodstudio.com Custom furniture

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dhazelton

2324 posts in 1758 days


#13 posted 01-03-2016 08:17 PM

Good point – maybe a new one wouldn’t be as good as my old one.

My 1990s 33 gallon Craftsman has a DeVilbiss tag on the pump and an Emerson USA tag on the motor. Doubt that would be so on today’s units.

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MrUnix

4209 posts in 1660 days


#14 posted 01-03-2016 09:03 PM

My 1990s 33 gallon Craftsman has a DeVilbiss tag on the pump and an Emerson USA tag on the motor. Doubt that would be so on today s units.
- dhazelton

Sounds like the same compressor I have out in the garage – 33 gal Craftsman badged Devilbiss. Been plugged in and turned on 24/7/365 since I purchased it and nary a problem… heck, I even remember to drain the tank once every few years :)

I looked at the new Craftsmans, and the upper end ones seem to be made by Wagner and some company called Midwest Air Technologies (somehow related to Powermate). Doubt any of them are made in the US.

Cheers,
Brad

-- Brad in FL - To be old and wise, you must first be young and stupid

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Matt Przybylski

528 posts in 1839 days


#15 posted 01-03-2016 09:04 PM

My model is a C2002 Type 5. I found this video online so I went and unscrewed my drain valve and its pretty rusted/nasty. Since the part is so cheap ($7 on amazon) I’m probably going to start there for replacements. Next I’ll probably replace the safety valve (or do both together) and then see what happens. Thanks for the input everyone.

-- Matt, Illinois, http://www.reintroducing.com

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