Topic: Midland Christensen air brake

[goofy3392]

I found this at a garage sale, was being used for a homemade air compressor in a small engine shop, I got it all for $15 and it works. The guy put a newer 1/2 hp motor on it.

Does anyone know anything about this pump or where I can go to find out about it? has some old patent numbers listed.



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[dave500]

an old truck unit?

[goofy3392]

Oops I forgot to post a picture.



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[mick7504]

There are a lot of those used here in Oz mate.
They're just called Midland here and can be used as a direct replacement for the Westinghouse Tu Flo air compressors.
They're fitted to to the earlier Macks, GM's,Perkins, CAT, Cummins etc.
You can still get parts for them at a good Brake place.

[goofy3392]

Ok so maybe if I take it to a truck parts store they might be able to tell me about it. I just wanna know if its valuable and how to check the oil, what type of oil to use..etc. 

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[mick7504]

They're usually pressure fed from the motor through the rear housing and into the crank gallery with an oil return line back into the sump of the motor.
15/40 Diesel Engine Oil or something similar should do the job.

It must have been modified to have it's own sump so providing that the crank can flick a bit of oil around inside it should be ok.

[goofy3392]

I think I'm going to take it off the setup and clean it up and check out the inside. It produces pressure, it got the tank up to 65psi in about 10 minutes or less. The tank is a 100lb lp tank. I don't know if that's too long of time or not for this compressor, it did get pretty hot, maybe I should mount a fan on it.

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