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Big boy Champion air compressor (picture heavy)

malibu101

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Jul 1, 2005
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3,908
Location
Walnutport PA
This is a 2002 Champion VR5-8 80 gallon compressor with an R-15B pump and a 5 horse 3Ø motor.
I aquired it from a job I was on for $50 and my labor to remove. It had some issues and the owner just wanted it gone, $50 is what he guessed he would get if he had his guys take it to the junkyard.
What I gathered from him was that it came as part of the package of equipment to support some sort of piece of magnetic labrotory equipment. He claimed it didn't run often and instead of fixing this he just plumbed the air supply from the buildings existing 4 cylinder 120 gallon duplex compressor. Plus this gave him one less item to maintain.
The 3 problems I was told it had were all I found-
1- The belt guard came loose and rubbed a hole through the finned copper tube between stages. I brazed the hole shut. A new tube is ~$70.
It works fine, for now. I guess time will tell.
2- The automatic tank drain leaked air. Taking it apart revealed a rubber seal that was shot.
No matter. It has brass pipes and a ball valve in the bottom like "normal".
3- The low oil level would trip once in awhile. Not all compressors have this option. Oil level was fine and clean but still tripped once maybe every 10 starts.
Compressor runs great so instead of opening this up I just jumped the wires together and lost this option.

After I repaired it I drug it on a trailer to a buddy who runs an auto repair shop that has 3 phase to test run it.
Right now it is just sitting in my garage at home. It will have to live in the shed next to the garage as it is just too big for my small space and it's kinda noisy.
I still don't know what I want to do for power. I hear that rotary phase converters and compressors don't get along but I have a 10HP 3 phase motor and a variety of caps that I may play with. Or spend ~500 on a single phase 5HP motor.

Here it is
2hq5gdd.jpg


My brazing of the tube
2pzxmvc.jpg


The low oil level switch I'm no longer using
29m9doz.jpg


Side shot showing the auto drain that I'm not using either
2uenpmc.jpg


Radiator just looks like it means business
dvooxh.jpg


Made In USA :rocker:
dxh9vd.jpg
 
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firebox40dash5

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Mar 19, 2012
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4,185
You ****. I paid more than that for an old Speedaire horizontal 3PH, then found out that when it had been tipped over (which I knew) it had smashed the valve seat in with the manifold.

I was going to offer you a used tube, but I guess my replacement pump didn't come with one. If you make it down near east Baltimore, call MTD Supply, I know they have some parts for them... they had a used pump for me, anyway. :lol:

I got stupid lucky and scored an old greaseable GE 5hp 1PH from a guy in York, for $100. Been purring with nothing but oil changes for a couple years now.
 
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malibu101

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Jul 1, 2005
Messages
3,908
Location
Walnutport PA
I got stupid lucky and scored an old greaseable GE 5hp 1PH from a guy in York, for $100. Been purring with nothing but oil changes for a couple years now.
I think I got stupid lucky scoring this compressor.
I wish I could get idiotic lucky and find a 1Ø motor like you did. :willy_nil
 

The mean fish

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Aug 31, 2010
Messages
323
I have that exact same compressor except mine is single phase, I bought mine dirt cheap but it was in fairly bad shape and needed a head rebuild so I dropped some cash into it.

You can buy a full rebuild kit for that auto drain for pretty cheap, I rebuilt mine and it works great.
 

firebox40dash5

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Mar 19, 2012
Messages
4,185
I think I got stupid lucky scoring this compressor.
I wish I could get idiotic lucky and find a 1Ø motor like you did. :willy_nil

If you'd like to be really pissed...

It was on ebay, with a $100 opening bid, and no bids.

I told my boss to call and offer the guy $200 for it. He called, and offered him $100. The guy accepted. I was on the road within an hour, cash in hand, to pick it up. The auction ended later... at about $250. :spit:
 

healing

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Jan 8, 2006
Messages
176
Ebay had some new 5hp 1ph motors for around $380. I would go that route then you would not need your rotary phase convertor to idle all the time when your compressor calls for air.
 

b-body-bob

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Oct 10, 2011
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1,621
Location
Almost Heaven
Nice Champ. I've got one here that was free for the taking. It popped a cap and the owner decided he needed a new one anyway. I replaced the caps and that only lasted about 1/2 of use before it happened again so I replaced the motor with a new Baldor from e-bay.
 

C96

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Nov 30, 2013
Messages
1,251
Nice compressor malibu101 great score, she looks awesome with after cooler to boot

But I must say, I agree with Bill

http://bombshellcoaching.com/wp-content/uploads/2013/01/bill-murray-you-****-239x300.jpg
 

kazlx

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Oct 30, 2012
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2,851
Location
Tustin, CA
Nice score. I would just buy a new motor off of eBay for ~$400 and be done with it. Don't waste your time setting up a rotary converter just to run a compressor. Figure you could probably get part of your money back on the 3 phase motor to offset your cost....
 
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geologist

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Dec 14, 2011
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5,326
I've got the same pump and a 12.5 HP Kohler that is getting ready to go on an 80 gallon vertical tank soon. It was a roadkill find (I made a thread about it) but the old tank was bad. It's a freakin' beast that won't leave you starving for air.
 
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malibu101

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Location
Walnutport PA
I've got the same pump and a 12.5 HP Kohler that is getting ready to go on an 80 gallon vertical tank soon. It was a roadkill find (I made a thread about it) but the old tank was bad. It's a freakin' beast that won't leave you starving for air.

I even got a file of paperwork for this compressor from the owner. :)
Anyway, in the manual for the R-15B it lists this--
min PRM- 400
max RPM- 1050
At 490 pump RPM it gives 14.5 CFM @ 125 PSI
At 1035 pump RPM it gives 30.2 CFM @ 175 PSI

It shows at 490 RPM it can run on a 3 HP motor
and at 1035 RPM it needs a 7.5 HP motor
All this is with a 1725 RPM motor

So, the 12.5 is manly, but overkill. But since you have it go for it!
Just be careful not to run the pump over 1035-1050.
 

healing

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Jan 8, 2006
Messages
176
So, the 12.5 is manly, but overkill. But since you have it go for it!
Just be careful not to run the pump over 1035-1050.

The 12.5 Kohler is a gas engine. Gas engine HP and electric motor HP are not equal it takes a bigger gas engine to equal the same electric HP. So that 12.5 kohler is about the same as a 5-7.5 HP electric motor. Depending on altitude and atmospheric conditions.
 

rothko

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Nov 10, 2013
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135
Location
South UK
That's the business!!
What would that be, at that quality, at todays prices new!!

Nice one.

Rothko
 
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malibu101

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Messages
3,908
Location
Walnutport PA
The 12.5 Kohler is a gas engine. Gas engine HP and electric motor HP are not equal it takes a bigger gas engine to equal the same electric HP. So that 12.5 kohler is about the same as a 5-7.5 HP electric motor. Depending on altitude and atmospheric conditions.
I did not know that about HP ratings.
Thanks for the info!

That's the business!!
What would that be, at that quality, at todays prices new!!

Nice one.

Rothko

Just a quick look at eBay says about $2300 I guess.
http://www.ebay.com/itm/NEW-CHAMPION-VR5-8-5-HP-AIR-COMPRESSOR-/180282857788
 
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Larch

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Apr 10, 2011
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289
Location
Ronan Mt.
Wow that is fantastic! I wish deals like that would show up here. One of the trade offs for living in a low populated area I guess. For you guys that have those 3 phase compressors, what do you figure they cost to run, on average? (Electric Bill) I saw one for sale in Missoula, about an hour south of me. It was a huge horizontal one, about the size of a VW Bug. They were asking $800 for it, way too big for my needs, but a guy can dream right? :)
 
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malibu101

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Jul 1, 2005
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Location
Walnutport PA
I run my Champion 5hp 3 phase on a 10 hp converter, it starts with zero issues.

So does mine.
Except my idler is drawing ~17 amps unloaded with a power factor capacitor.
No PF cap and it draws ~21.
That's alot of electric to be using constantly just to be ready for when the compressor needs to kick on.
j6jrra.jpg
 

Todd.Brock

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Jul 15, 2008
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4,250
Location
Cincinnati
Did you build the RPC from CL parts? Curious if you spent more than a single phase. I'm considering keeping my 5 hp 3 phase to use for an RPC to power a big grinder
 
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malibu101

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Messages
3,908
Location
Walnutport PA
Did you build the RPC from CL parts? Curious if you spent more than a single phase. I'm considering keeping my 5 hp 3 phase to use for an RPC to power a big grinder

The 10HP idler is something I got about 10 years ago for free on a cleanout of a commercial building by throwing it in my truck instead of the dumpster.
It was fully rebuilt, never used, and in storage there for a critical air handler they had. When we got there the air handler was long gone so this was just a big, heavy doorstop.
I then threw it in my dad's barn thinking that maybe one day I could use it. It laid there until last weekend when I pulled it out, dusted it off and wired it up.
The day came that I could use it. :)
So, it didn't cost me anything. :)
The little 1HP pony motor was laying in the barn too.

A single phase 5HP quality name compressor motor is about $400.
 
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