Champion compressor

[Motown 454]

Need Help! is this a Champion R15 compressor pump?

Hi, I'm looking at a Champion compressor, old tank but pump looks good. The serial # on the pump is R15147244, is this an R15 pump? I'm in contact now need to give him an answer.

Thanks








I just talked to the guy I got the pump for $100

 

[malibu101]

It look like an R15B to me.

The low oil cutoff is a nice feature.

 

[Todd.Brock]

Re: Need Help! is this a Champion R15 compressor pump?

Yes. It’s an r-15. That’s a good version that uses disk valves vs reed valves. Good score for $100. Id have done that deal.


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[Motown 454]

I made out because I was going to offer him $200. I was typing the price offer and he asked if $100 would be good, I was so glad I type terriblely. lol.

 

[yatg]

Nice find. Looks like the intercooler line was replaced with a stainless braided hose. Might want to work on that.

 

[finn]

The intercooler lines on mine are a series of stamped discs slid over the air transfer line.

Not exactly precision parts. It should be relatively easy to replicate with a sheet of thin copper or aluminum and a couple of punches.

 

[skippydoo]

That is a very good pump. They last forever if you have a 3hp motor hooked to it. 5hp spins a lot faster and thus more heat and wear. Pretty quiet when running too.

 

[930dreamer]

Champion makes a very nice compressor, great score.

 

[nadogail]

May you enjoy it for many years in good health.

 

[7635tools]

That is a very good pump. They last forever if you have a 3hp motor hooked to it. 5hp spins a lot faster and thus more heat and wear. Pretty quiet when running too.

Just curious, how does a 5hp motor spin faster than a 3hp. Typically motors on compressors are of the 1750rpm or 3450rpm variety. Rpm’s are fixed unless using a VFD or some kind of speed controller which on a compressor is worthless. Given the same pulley diameters, both motors would spin the same rpm will they not?


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[malibu101]

Yes, but...
It takes more horsepower to spin the same load at a faster speed.

This pump can run from 3 or 5 to 7.5HP motor.
A higher HP motor, with the right size pulley, can spin the pump faster than a lesser HP motor would be able to.

There are charts out there as these are common pumps.

 

[Motown 454]

Thanks everybody! It's in the garage. The oil is nice and clean, I'll spend a little time cleaning it up tomorrow.

My compressor I have now has a 7.5 hp 3400 RPM motor. Can I change the pulley and run it with the same motor or will it loose too much torque by slowing it down the pump is good between 400-1035 rpm with 945? rpm putting out 23.5 cfm at 175. or close to that.

 

[finn]

The Champion R15R manual is available on the Champion website. They list the cfm at 125 and 175 psi, as well as pulley size for a 1725 rpm 3, 5, and 7.5 hp motor.

Recommended diameters are 4.31, 7, and 9.75”, respectively. Corresponding pump rpm is 440, 710, and 990 rpm, with12.8, 20.7, and 28.7 cfm at 175 psi.

They also provide the formula (pulley dia = compressor rpm x flywheel diameter / motor rpm), which is, I think, what you are looking for

 

[Motown 454]

Thanks Finn!

 

[semitruckkw]

I have a ren 10 that looks quite similar. I am having problems with it. It was working but was badly in need of overhauling, so I did the overhaul. The unloader pin and assembly was all seized up and the vent plugged, I put new rings in and cleaned the disk valves, reassembled and it pumped good up to about 75psi. Then the motor overheated and the reset kicked out. It seemed like the unloader was causing the problem (as pressure built it became stiffer to turn), so found a new front cover with the new spring and pin assembly. put it on and it does the same thing. But now when it shuts off all the air leaks out the unloader vent (which had been rusted and plugged).Can anybody help with this? I didn't pay close attention to the centrifugal weights in the compressor when I disassembled it. Its installed correctly but not sure of the placement of them in relation to the pistons. Could that be causing the problem?
One thing I wonder about is the motor is only a 1hp which I'm sure wasn't original. It ran fine when the pistons were worn so bad, but with things being tighter like they should will it take a stronger motor and just let it force the harder turning new compressor?
I've spent a ton of money on the new parts hoping to get a quality product but I'm really not impressed.
Any ideas would be appreciated.

 

[finn]

A quick search suggests the Ren10 is the predecessor to the R model Champion compressor, and the smallest motor available was a 2 hp with 4.75” diameter pulley.

Don’t know the motor rpm, but a search should turn that information up.

There are several hits when you do a search.