Should I buy this locked up 60gal. compressor? - Page 2 - Hot Rod Forum : Hotrodders Bulletin Board
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  #16 (permalink)  
Old 06-15-2008, 09:42 AM
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Actually those pumps are of the "throw away" type and they only have scrap metal value. Plus most of them, most likely this one too, have no lower end bearings they just have an Aluminum connecting rod fitted to the crank. While it certainly is possible to rebuild one of these things it is simply not practical to do and in all likelyhood would cost more than a new pump unless you have the means to machine the parts yourself. Now if this was a big Quincy, Rol-Air or one of the industrial Ingersoll Rand pumps that would be different. It might be interesting to know that these cheap pumps made for Campbell Hausfeld, etc are made here in the USA and the pump itself is not a bad piece of equipment for what it costs if taken care of but they are highly over-rated as to performance and are sold rated for jobs bigger than they can easily handle.

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Old 06-15-2008, 11:01 AM
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Porter Cable lists two 60gl models. One cast iron pump and one aluminum pump. Both single stage pumps. If he can get the unit for nothing or next to nothing and replace the pump with a two stage cast iron pump he'll have a good compressor that should last for years. TF
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Old 06-15-2008, 11:47 AM
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Quote:
Originally Posted by jaguarxk120
Porter Cable lists two 60gl models. One cast iron pump and one aluminum pump. Both single stage pumps. If he can get the unit for nothing or next to nothing and replace the pump with a two stage cast iron pump he'll have a good compressor that should last for years. TF

True but that 7 "peak" HP motor is really only about 3 to 3 1/2 real HP so powering most two stage pumps with it may be a problem, the ones he would likely find anyway would require at least 5 HP. When you get into the two stage units the ratings are generally closer to fact and as such will require a motor with some real power and not that "peak HP" BS. You will then be looking at a motor with at least 23 AMPs or more and with a much larger shaft than those small over rated motors. Basically if he were to use a two stage pump about the only thing he would be able to use from the outfit as it is would be the tank.
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Old 06-15-2008, 11:51 AM
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If he were to go to a two stage pump it would have to be rated to the motor on the exstising compressor. May have to giveup smoe scfm in trade for a quiter running unit. TF
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Old 06-15-2008, 02:26 PM
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Tell him to give it to you. It's a business write off anyway.
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Old 06-15-2008, 03:43 PM
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I'd say about $50. The first compressor we had was a $369 lowes special. The pump wore out. It got real hard to turn and it burned up the motor. We then bought a nice compressor that was 6.5hp 80 gallon and about 20cfm. It worked fine for about 5 years and it burned up the motor. We put another motor on it $190, and it lasted about a year. Then I had some money and bought a powertrain compressor 6hp 60 gallon and it has worked good for about a year. I think most compressors are throw away now. If the compressor is bad the motor could be wore out. I think if a new one is around $400 it would be better to get a new one with a warranty.
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Old 06-15-2008, 04:09 PM
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[QUOTE=old fords] I think most compressors are throw away now./QUOTE]




Exactly why something like a Quincy, an Ingersoll, etc are worth the extra money if you plan to use it for more than a couple of years or so. Don't lump all compressors together there is a difference, a big difference, The CHEAP compressors are of the throw-away variety but a Quincy, etc will last for many years and provide good service while you have it, these things are a classic case of the old saying "you get what you pay for".
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Old 06-15-2008, 04:21 PM
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I am sure that you get what you pay for with compressors but I think if you take care of even a cheap one you can get it to live. We ran this one hard for 5 years and I don't know how long before that. I think with some oil it would have kept trucking.

Right now I own a Husky 23gal oil less and it has served me well but its time to upgrade!
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Old 06-15-2008, 04:47 PM
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No doubt there is a place for these cheaper outfits and it would make little sense to spend the money on an industrial compressor for home/weekend use. My point was that if someone is going through one of these things every 2 or 3 years then they would be better off with one of the better ones that could very well last 20 years or more, just depends on what on what it is being used for. If you were planing on running a shop for a living or just wanted to buy a compressor that you would not have to worry about for many years then the better ones are the way to go. There is nothing at all wrong with what you are wanting to do here and if you can find a good pump cheap enough you could very well end up with a compressor that will last a long time for only a couple hundred dollars or so, not bad at all!
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Old 06-19-2008, 05:21 PM
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Just an update on the compressor situation. The brand new Cambell Hastfeild 80 gal, $900 compressor my boss bought broke down after about two hours of use.
We were desperate so we tried putting oil in the porter cable and it runs fine now!
Now he says he will sell it to me for $300! I said I would not pay more than $200 for it. The pumps are not rebuildable and its probably going to die.
He says the GE motor on it is worth $200 alone..

You can't buy stuff from pack rats. Not within reason.
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Old 06-19-2008, 07:28 PM
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GE motor? On a Porter Cable? Check the AMP rating on that thing it may be a good buy at $300, Look at the size of the pulley shaft and see if it is bigger than 5/8". A good GE motor and a 60 gal tank would be well worth tracking down a pump for especially if it includes a pressure switch, pop-off valve, etc.
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Old 06-20-2008, 03:05 PM
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Well he told me today he would take my offer of $200!
It seems to be working fine too.
The GE motor is only 16 or 17 amp I think and its shaft is not bigger than 5/8s. I bet it is still a pretty good motor. I think I got a deal after all.
Thanks for all the help.
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  #28 (permalink)  
Old 06-20-2008, 04:25 PM
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that's around 4hp or so.

it might run fine for a long time w/o a new pump... I know a mower engine is similar in design and my dad's mower engine has seized up 3 times from not having oil in it.. ( it uses more oil than gas, and doesn't leak a drop.. but the mower was free soo ).. and it still runs fine after it cools down.. all the bearings and everything are simmilar in design between compressor pumps and small engines.
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Old 06-20-2008, 04:49 PM
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Matt is right that thing may not be hurt as bad as it might seem. It almost certainly is just an Aluminum rod fitted to the crank and has no bearings, just the aluminum against the cast iron crank. For sure the best thing to do would be to just run it and listen for a knocking sound because until it starts to knock, if it ever does, then there would be no real need to change the pump. Just run it a couple of hours and then change the oil, if it runs that long without a problem there is a good chance it will last a long time.
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Old 06-20-2008, 05:28 PM
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Get the thing! Flush out the crankcase fill with a good 10-40w oil and try running it. Sounds like your not going to run it 24/7 but only when needed. If you need a new pump get one, I think your money ahead with this compressor. By the way I was at HF today and the store has a sale going on for a vee-twin pump for $99. Good luck Tom F
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