Hemmings Motor News Blog Blog

Hemmings Motor News Blog

Hemmings Motor News has been around since 1954. We're proud of our heritage, but we're also more than the Hemmings full of classifieds that your father subscribed to. Aside from new editorial content every month in Hemmings, we have three monthly magazines: Hemmings Muscle Machines, Hemmings Classic Car and Hemmings Sports and Exotic Car.

While our editors traverse the country to find the best content for those magazines, we find other oddities related to the old-car hobby that we really had no place for - until now. With this blog, we're giving you a behind-the-scenes look at what we see and what we do during the course of putting out some of the finest automotive magazines you'll ever read.

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How to Rehab an Air Compressor

Posted April 22, 2009 12:01 PM by dstrohl

I mentioned a few days ago that I've been getting my garage in order in preparation for the eventual day when we have warm weather again in Vermont, and one task that I've busied myself with lately is the rehab of an old Speedaire compressor that Lentinello gave me a while back when he bought his big spiffy brand new compressor.

Lemonjello said it worked well for him, but kept blowing breakers whenever it filled to capacity, and a buddy of his tried in vain to rewire it. Which is probably why the Square D cutoff switch on it didn't come with the power cord. Six bucks at the Home Despot and I solved that issue. Left it wired for 110V, though instructions on the motor provided for a 220V setup. Surprisingly, it's not nearly as loud as other compressors I've worked with, including Lunchandbellow's shiny new unit.

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Popular Science - Cosmology - New Member United States - Member - New Member

Join Date: Aug 2008
Location: Dublin, GA, USA
Posts: 69
#1

Re: How to Rehab an Air Compressor

04/23/2009 10:33 AM

You might want to inspect the points on the cutoff switch to make sure they're not pitted. This could cause the contacts to stick causing the motor to strain at max pressure and pull to many amps.

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Guru

Join Date: Apr 2008
Posts: 1985
#2
In reply to #1

Re: How to Rehab an Air Compressor

04/23/2009 10:43 AM

thanks for the tip. Offhand, I don't know the condition of the points, but the switch seems to operate as it should.

dan

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Join Date: Mar 2009
Location: united states, california san francisco bay area native
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#3
In reply to #1

Re: How to Rehab an Air Compressor

04/23/2009 3:54 PM

the switch arm .. ( 1 side of the contact ) may be bent slightly.. i have had that in the past .. also.. the psi relief value may not be set correctly..... lastly .. it's possible that the circut that supplied the power was rated below the start up amps for the elec motor.. i.e a 10 amp breaker when the motor requires 14 at start up.. should be on the data plate..if you've got it..gl

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