1940's vintage Brunner 333 pumping but not building pressure

by Dave Randall
(North Mankato, MN)

I own a 1940's vintage Brunner 333 compressor the was my grandmothers in her service station in the 40s and early 50s. It became lost in the early 2000s and I just retrieved it in January of this year.


I have been doing odds and ends repairs to it but can't get it to build pressure in the tank. It has suction on the intake and puts out pressure on the output. What do you think could be my problem?

Thanks
Dave Randall
North Mankato, MN

Comments for 1940's vintage Brunner 333 pumping but not building pressure

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Dec 08, 2018
1940's vintage Brunner 333 pressure problem
by: Doug in s.d.ca.

You've checked the obvious - loose connection from pump to tank, tank drain valve closed? Maybe even tank pinholes...?

There's a good chance the thing pumps, but has a leak *inside* the pump, preventing noticeable pressure output. You could try connecting a short piece of pipe with a gauge and valve. Open the the valve, start it, and then close the valve slowly and see what happens with the pressure that way.

Good luck.

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