Old Sears Compressor, which dirrection does pump rotate?

by Greg O
(Colorado)

I have just acquired a Sears Compressor from the 70's. It has a Leeson 230v motor that is not dual voltage. I have a nice Baldor 115v motor that I want to replace the Leeson with, but I do not know which direction the pump/motor should rotate. I cannot get the compressor to the only 230v plug in my house without moving major appliances out of the way. Is pump direction the same on all compressors? I don't want to do harm to the pump if I start it up in the wrong direction. I know I can reverse the motor's direction if I need to, but I don't know which direction is correct. I can provide model number and photos if that would help.

Thanks!
Greg in CO

______________________
Bill says...

My guess would be counter-clockwise looking from the shaft end, but that's just a guess, Greg.

Anyone else out there know the answer?

Cheers,

Bill

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Feb 18, 2011
Bill was right!
by: Greg O

In case anyone else out there has this question in the future, the compressor (my old Sears anyway) turns counter-clockwise at the flywheel end to pressurize the tank.

Thanks!

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Air compressors blowing up (Sears)

by Glenn
(Nickerson Mn, Pine)

My sears air compressor blew up in the garage. Took out block wall & ceiling out above (12'). Why or how did this happen? sear 919.170230 3hp 30gal.






Bill says...

Glenn. Yikes!!!!! I hope no one was hurt?

I can't be sure since I'm not seeing the remains, nor did I see the compressor before the accident, but it sounds to me like your compressor pressure switch may have failed.

If the pressure switch doesn't shut off the compressor at the high pressure set point, then the compressor will keep running and building pressure in the tank.

If that happens your pressure relief valve is supposed to open to vent overpressure before exactly what you say happened, happens.

So, pressure switch failure, and then a PRV failure, or did you even have one installed?

Both failing at the same time is a very unlikely occurrence and I'm sure sorry that you were the subject of the unhappy results.

Good luck with the next one. And periodically pull the ring on the PRV and then push it back into place to make sure that it operates freely.

Cheers,

Bill

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