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craftsman pro air compressor

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scottm

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Joined
Aug 3, 2009
Messages
51
It looks like that sticker on the tank might say 21 AMPs, so it should be around 5HP if I'm reading it right. Kind of blury, so I'm not sure.

A 60 gallon 5hp single stage home type compressor runs around $800 new, so if that is what you found I'd buy it. I'd prefer a cast iron pump, but you can't be as picky buying used.

If it turns out to be a 3HP one I'd pass. Last week Rural King had a rebranded Sanborn (Industrial Air) 3HP 60 gallon cast iron pump on sale for $380, and TSC had a similar 3.2HP Campbell Hausfeld on sale for $429. I'd just go buy a new one and be not have to buy a belt and take a chance on everything else being OK.

Also, remember you can't trust the HP stickers, look at the AMPs it draws. 3HP will be around 15 Amps, 5HP will be around 22 Amps.
 

rhastings80

Well-known member
Joined
Apr 1, 2009
Messages
636
You may want to check parts.sears.com and see if they even sell any replacement parts for it. My buddy is having a hard time finding parts for his Craftsman professional that is about 5 years old. Maybe you can figure out who the OEM is that made it. I would rather buy a IR or something where its easier to get parts.
 

KinzeMech

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Joined
Jul 15, 2012
Messages
1,164
I have one of those. Bought it in 2005. I have replaced the belt once since then. I added a solberg silencer type filter to quiet it down. It has been a good machine. When run for a long time, the unloader valve blows a tiny bit of oily, rust colored "snot", but it has never needed an oil top up.

The last time I replaced it, the belt was available from sears parts.

It is a 3.1 HP compressor. around 11 SCFM@ 90 psi.

The OEM on that model is DeVilbiss.

The price he's asking would be fair if it was running. I'd talk him down to $200. You are not only looking at replacing the belt, but also taking the chance the belt broke due to a problem with the pump. You will not be able to test run it, so you are taking the gamble on it if you buy it.

If you buy it, and all it takes to get running is a belt, Give it a fresh oil change. Then adjust the pressure switch to shut down around 135 or so. From the factory they come set to 150psi. That is pretty high for a single stage pump, and unnecessarily hard on it. Beyond 135 psi, the pump output falls off rapidly, and it will run a lot longer from 135 to 150 than it did to get to 135 from 120.
 
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KinzeMech

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Jul 15, 2012
Messages
1,164
Thanks Larry.

Also worth pointing out, the unloader dumps out right at the right side (as you are facing it) of the pressure switch. On mine, that periodically spits that rusty colored oily snot I previously mentioned, has left an oily stain in the area of the pressure switch, and on the steel air lines in the vicinity. While it has caused no performance issues or noticeable oil consumption, I still wish it did not do that. The sticky oily stain it has left on mine would come off with nothing less than a pressure washer, I am sure. The compressor pictured is not oily at all in that area. I would take that as an indicator it does not have this minor problem.
 

pipsters

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Joined
Sep 1, 2010
Messages
4,899
Location
USA
I have the same comp pump but in the 25 gal version. Just spins slower. It's an aluminum pump with iron sleeves like every modern car these days. The fact that the belt is snapped is supicious. Make sure you can run the motor and turn over the pump easily.

Also the head bolts need to be re-torqued after running a few hours, I'd bet no one has ever done that. IIRC I used 27 ft-lbs. In my experience the compressor is under-rated and will perform better than a similar spec'd one from another manufacturer.
 
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Gil_MKiii

Active member
Joined
Nov 5, 2012
Messages
25
Location
Los Angeles
Thanks for the advice guys. I'm currently just looking around to whats going on in the used compressor market. I'll keep hunting though.
 

ARAMP1

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Joined
Nov 15, 2005
Messages
624
Location
Memphis, TN
I've used that same compressor since 2005 and it's been great. Made in the USA too.

PM me your e-mail address and I'll e-mail you the operators manual. It's too big to attach.
 

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KinzeMech

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Jul 15, 2012
Messages
1,164
Nice air filter.
Was it louder or quieter than the original?

I put a solberg silencer on mine and I think it cut the volume in half.
 

the1nonlyjl

Banned
Joined
Jun 23, 2012
Messages
555
Location
Westchester County, NY
http://losangeles.craigslist.org/wst/tls/3587395745.html

What do you guys think of this compressor? I have lots of air tools that I'm bringing home from the shop. What should I be looking for my house compressor? I would only be working on my cars. Please help a newbie out.


Ahhh god forbids if 'pressor goes down and it doesn't have a warranty anymore. How would you trust that seller for sure it is in working order? I would prefer buy a brand new one with warranty. *knocking on the wood* It is up to you. Just giving you my 2 cents.
 

ARAMP1

Well-known member
Joined
Nov 15, 2005
Messages
624
Location
Memphis, TN
Nice air filter.
Was it louder or quieter than the original?

I put a solberg silencer on mine and I think it cut the volume in half.

It is a little bit quieter. I had an open element that I wish I would have tried before I sold it.
 
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