Rebuilding Compressor

he had heard of knurling but didn't have access to that setup. I ended up putting it back together as is. New rings on Low side piston, new gaskets, new valves/plates on both sides. Took about 20 minutes to fill totally empty tank with the 1HP motor on it (110V) instead of the 1 hr+ I might try pulling high side head tomorrow, replace rings, do a quick hone of that cylinder and see if that helps more. Tank stops filling around 125 PSI.
 
Amazing what these pumps look like inside. They compress air but by the look of the crud/wear looks like they were running Nitro :p.
 
Thanks S.O.F., I have to trust your math as that formula made my head spin. That's one good reason why I chose being an artist. I will replace rings on high side today and see if there's any improvement in time. The other thing is that pulley/belt isn't properly lined up and I'll likely have to make some kind of adapter since I don't want to modify compressor body to accommodate this aftermarket motor. Seems that if I upgraded motor, it still wouldn't give me higher output.
 
Rustbuster77;21349 said:
Thanks S.O.F., I have to trust your math as that formula made my head spin. That's one good reason why I chose being an artist. I will replace rings on high side today and see if there's any improvement in time. The other thing is that pulley/belt isn't properly lined up and I'll likely have to make some kind of adapter since I don't want to modify compressor body to accommodate this aftermarket motor. Seems that if I upgraded motor, it still wouldn't give me higher output.
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Mount the motor on a pair of rails, then mount the rails to the existing compressor bolt pattern.
You should figure out the rpm's you are running the pump at . motor rpm, and the diameter of both pulleys is all that is required.
3rd - never trust a senile mind, LOL.
 
figuring rpms and all...I think I'd be guessing at best. It's a total guess from my point, I know what motor speed says it's supposed to be and the pulley size I'm using is likely not stock. So it's probably back to more math...I might have to ask my 11 year old as I don't do calculations like that, I end up throwing things in frustration ;)
 
regardless of what you end up doing remember this will supply contaminated air not fit for paint. you will have to have extensive filtering to remove the oil vapor.
 
shine;21410 said:
regardless of what you end up doing remember this will supply contaminated air not fit for paint. you will have to have extensive filtering to remove the oil vapor.
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Sorry for not understanding, what exactly about this compressor or style that will give me oil vapor vs other compressors? I want to learn and I know you are are wiser/more experienced than I so I can decide if I'll just cut my losses now or do a more thorough rebuild consisting of new pistons, cylinders, etc. if I have to, I'll sell unit and get something else, just don't have deep pockets since I'm a hobbyist with some limited body and paint experience. Thanks for your input
 
with the age of the compressor and the condition of the cylinders it is unlikely your going to get s really good seal. just use a motoguard cartridge filter at the compressor to trap the oil vapor. old compressors are not ideal for painting . ok for running tools and such but you need good clean air for painting. my compressor is old and has been rebuilt twice. it is over 100 ft from my booth and i use 2 cartridge filters . one at the compressor and one in the booth.
 
That's exactly kind of answer I was looking for. Straight ahead and no $5 words. Thanks! I'm going to likely list it in Craigslist and local garage sales. Great for a lot of stuff. Just not complete paint jobs.

17:04 to fill from completely empty at 125 PSI
I bet S.O.F can figure out scfm if it's changed any.

Here's video after rebuild

 
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sorry to bust your bubble but we sometimes forget how important our air supply is. my compressor has served me well but i am thinking seriously about replacing it with a new one.
 
No worries at all, you tried to warn me earlier. I appreciate your thoughtful advice, I just am one that likes to know why behind it so I can learn. At least I don't have much into it and can hopefully recover my investment. It would be a great compressor for someone not trying to paint. I had just probably gotten lucky in years past using the old Montgomery Wards single stage compressor and painting outside in my dad's driveway with Base/Clear Deltron back around 1990 or so. Had some pretty nice jobs with very little trash in it.

However, I don't think it's worth the risk to possibly blow hundreds of dollars of SPI product out the window because I was too stubborn or stupid to listen to sound advice. I just don't have a big budget for a compressor but really need to get my projects done. Can't afford a $1200+ compressor at the moment.
 
An oil coalescer is always a good addition to a compressed air system. You might be able to find one on ebay.
 
Turns out I was very wrong. I dialed in regulator at 40 PSI and timed how long it took before pump kicked on. 1 minute. After 5 minutes of constant 40 PSI setting on regulator with open air hose attached, it dropped down to 25 PSI. That alone tells me this thing can't keep up with even a small spot job. It's going to have to go :(
 
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Is that a fair test? How about attaching your spray gun and see how long it can maintain correct spray pressure.
 
good one crash. I would go hone bores and clean ring grooves, file fit oversize rings and ck bearing clearances and set/shim whatever accordingly.
 
you cant run an hvlp with only 40-50 lbs at the wall. i maintain 100 lbs at the wall to feed the gun. barry convinced me long ago to keep as much as possible available at the wall to ensure enough volume .
 
Is there a compressor that would fit those specs for $1200 or less?
 
Rustbuster77;21465 said:
Is there a compressor that would fit those specs for $1200 or less?
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http://www.northerntool.com/shop/tools/product_200350475_200350475
Quincy A few dollars over budget
Five year warranty bad ass compressor i spent alot of time comparing 100% usa made
Baldor motor. Pay attention to how everybody rates thier cfm.


Quincy's run at lower rpms and are quieter. Plus they are rebuildable unlike many others. It will take care of your needs painting. Da's cut off tools etc. And last a long time
 
My dad works for Trane which is owned by Ingersoll Rand and I can get a 15% off, so might have to stick with that brand. This time, a new one ;) I hope to recover my investment on this one. Should have listened to Shine...go ahead, rub it in.
 
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