Hello Men,

I am interested in a very nice two stage compressor.
It was built with parts from a variety of sorces.
I forget where the 80 gallon tank was purchased but it is an very old one
with the cast iron plates fastened to the top that the motor and head are
mounted to.

The motor and compressor were purchased from a Montgomery Ward Store many years
ago.
The motor is a single phase, 25amp, 5HP unit with a 1-1/8" output shaft.

Then my big question is with the two stage head.(also from MontWard)(so says
the man); the numbers on the head are as follows and I wonder if anybody knows
how to determine the SCFM and PSI from the numbers

one set is -------- H25.8B
second set is ------------ 75-6-6515 R

I sure would like to hear from you and determin if I should consider this above
mentioned unit or go with the Ingersol Rand that puts out the
15SCFM @ 90psi

Thanks,

Dean Pittsburgh, PA

You can expect maybe 14 CFM @ 90 PSI.

"Real old" isn't exactly what you want in compressors. "Brand new"
is what you are looking for. Like car engines, they wear out. Tanks
rust out, too. Here are a couple of tips:

Look very carefully at the motor control electronics. If there is
a mag switch then open it up and examine it for voltage and current
ratings. If it it was wired for 440V then it will likely be a small
current rating, and if you want to go down to 220V you will have to
find a big mag switch which is expensive.

Look very carefully at the compressor head. Is it really dirty?
If so, maybe it was slinging oil which collected dirt - in other
words, maybe it's worn out.

Look very carefully at the air intake filter. You want to see a nice
new one, not a ratty old one or none at all. No air filter for sure
means worn valves.

See if you can get the seller to run the thing, then while there is
pressure in the tank open the drain valve. What you want to see is
just a little oily mist. What you don't want to see is a huge puddle
of rusty water.

It's real hard to sell things nowadays. Few sellers have guys leaping
at them with cash in hand. Throw money around like a Scotchman with
no arms. Think twice before buying, and make the seller really work
to make the sale. You are doing a good thing to solicit advice. I once
bought an old 2-stage Quincy compressor and put WAY too much money
in it. Along the way I learned every lesson I mentioned in this post.
Plus one more, and here's that one:

Compressors are top heavy. If you move the thing with a flatbed, really
tie it down good. They like to fall over. And when they do, something
breaks!

Good luck. The Ingersoll Rand 7.5hp single phase unit is a very nice
compressor if you decide to buy new.

Grant Erwin
Kirkland, Washington


Rettgerinc wrote:

Hello Men,

I am interested in a very nice two stage compressor.
It was built with parts from a variety of sorces.
I forget where the 80 gallon tank was purchased but it is an very old one
with the cast iron plates fastened to the top that the motor and head are
mounted to.

The motor and compressor were purchased from a Montgomery Ward Store many years
ago.
The motor is a single phase, 25amp, 5HP unit with a 1-1/8" output shaft.

Then my big question is with the two stage head.(also from MontWard)(so says
the man); the numbers on the head are as follows and I wonder if anybody knows
how to determine the SCFM and PSI from the numbers

one set is -------- H25.8B
second set is ------------ 75-6-6515 R

I sure would like to hear from you and determin if I should consider this above
mentioned unit or go with the Ingersol Rand that puts out the
15SCFM @ 90psi

Thanks,

Dean Pittsburgh, PA