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Allis Chalmers Discussion Forum

WD45 Mag repair-again! (long)

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Pete S

10-22-2007 07:58:11

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I had submitted a question regarding the workings of my magneto delema a while ago. Well I recieved a lot of good information and again THANKS!

The tractor has been running fine, but we went to split wood yesterday, and the darn thing just died out in the yard!

Trying here to make a long story short, no fire from the mag! DARN! what now!

I positioned the rotor to #1, took off the mag and into the vice it went. I played around and it "appears" that what may have been the culprit all along was the groundling lug on the mag, had an oxidized/damaged insulating washer as it would fire intermitantly when I moved it around.

Actually someone had shared that problem with me but I couldn"t get it to not fire when we had this problem the first time.

SO, the fix; Find/Build some new insulating washers. The first material I used was "gasket material" which would have probably drawn mositure eventually, but they worked........kind"a.

When I re-assembled things, I didn"t notice that the coil was pushing against the screw head of the lug inside the mag, thus not allowing the "cap" to seal.

So, it was back into the shop, to find something thinner yet durable. (they didn"t leave much room in that mag housing for washers!)

I thought something "plastic" would be superior, but "butter dish" plastic was purty much all I had.
THEN! I thought the nylon jacket off of some NM cable (romex) would work!

So, that"s what I did! I have a punch set that has a variety of sizes and was cheap, and they made some handsome nylon washers!

The jacket is designed to withstand 90*C rated conductors, so I thought that it would work.

I know it"s not OEM, but at our place, when ya gotta fix something, sometimes you need use what you have to make things work.

Just thought I"d share.

And thanks again!

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