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polarize generator
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JOHN N/IL View Drop Down
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Joined: 11 Sep 2009
Points: 584 		Post Options Post Options   Thanks (0) Thanks(0)   Quote JOHN N/IL Quote  Post ReplyReply Direct Link To This Post Topic: polarize generator
    Posted: 06 Dec 2011 at 7:24pm
I bought a new vr for a d17d 1958.I need to know if i have to repolarize the gen.If i do then i was told you can damage things if you do it wrong.It depends on what type of field grounding you have.Whatthe way to tell if you have an internal ground or external ground through the vr. Thanks for any insight,John
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DougS View Drop Down
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Joined: 03 Nov 2011
Location: Iowa
Points: 2490 		Post Options Post Options   Thanks (0) Thanks(0)   Quote DougS Quote  Post ReplyReply Direct Link To This Post Posted: 06 Dec 2011 at 8:19pm
Polarizing a generator is no big deal.  Momentarily touch a live wire from the battery to the A (armature) post on the generator.  You need to repolarize a generator when you change your system from positive ground to negative ground.  Otherwise it usually isn't necessary.
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Chalmersbob View Drop Down
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Joined: 11 Sep 2009
Location: Pennsylvania
Points: 2122 		Post Options Post Options   Thanks (0) Thanks(0)   Quote Chalmersbob Quote  Post ReplyReply Direct Link To This Post Posted: 06 Dec 2011 at 9:50pm
The last VR that I purchased came with instructions on how to polarize the Genny.
I always just "flashed" the terminals. however the instructions sheet said to hold the wire on the terminal for several seconds. The one VR that I replaced 2 years ago didn't work after I flashed it. I talked to the dealer service tech and he said he has had them that required 2-3 flashes before they would work. I tred it again, several times, and it worked. Bob
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