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Shes too close to a stud

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    Posted: Sep/10/2019 at 12:13pm
I thought I might get a quick answer here, the output stud on the back of my 100a alternator is just a couple of mm's from a boss on the block (360), just above the oil filter.  I cant get a piece of box cardboard between the two.  I shouldnt have to worry about an arc occurring there, should I?  Dont I need like 300V for that to happen?  If it matters its a internally regulated Powermaster with a Motorola front case section so it fits the stock brackets (more or less).
72 Javelin SST P code 360/auto/A/C/ rear defrost option/white on blue
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Post Options Post Options   Thanks (0) Thanks(0)   Quote Heavy 488 Quote  Post ReplyReply Direct Link To This Post Posted: Sep/10/2019 at 12:20pm
No chance of an arc.
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Post Options Post Options   Thanks (0) Thanks(0)   Quote CHAR Quote  Post ReplyReply Direct Link To This Post Posted: Sep/10/2019 at 12:22pm
Moocho thanks, Heavy.
72 Javelin SST P code 360/auto/A/C/ rear defrost option/white on blue
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Post Options Post Options   Thanks (0) Thanks(0)   Quote billd Quote  Post ReplyReply Direct Link To This Post Posted: Sep/10/2019 at 12:52pm
IF there's an arc, you have other problems and have likely blown the alternator through the event that caused the arc, not the arc itself. 

My thought is - gee, if he loosens the bolts to change the belt or tighten it, etc. - then sparks could fly depending on how things line up. 
300 volts won't jump such a gap, but swinging that alternator out or in, or moving it with a loose mounting bolt could close that gap up. 
So maybe disconnect the battery when doing work on the belts?
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Post Options Post Options   Thanks (0) Thanks(0)   Quote CHAR Quote  Post ReplyReply Direct Link To This Post Posted: Sep/10/2019 at 1:07pm
Naw, that wasnt it. The battery has to be out of the car to drop the alternator in from the top anyway.  I was thinking about when its running down the road and putting out power.  Its in place and the belts are tight, I just discovered the proximity when I tried to put a box wrench on it.  I was also looking at if the depth and diameter of the alt. would mean I could not change out the oil filter mount with the adapter and run one of the FL1A's on it.  I havent made that change and dont know if the filter diameters change.  I already had to ditch the bell oil pressure sensor that I had for the alt to fit.

Edited by CHAR - Sep/10/2019 at 1:09pm
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Post Options Post Options   Thanks (0) Thanks(0)   Quote Trader Quote  Post ReplyReply Direct Link To This Post Posted: Sep/10/2019 at 1:13pm
I would not have any warm fuzzes. Is there room to shim the alternator out enough to put a vinyl screw protector on it? Rotate the alternator halves so the stud is in a more favorable location?

This all depends on belt alignment, but that does have some forgiveness. A shorted battery lead has very little in way of forgiveness and you may not be the next person changing a belt. 
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Post Options Post Options   Thanks (0) Thanks(0)   Quote billd Quote  Post ReplyReply Direct Link To This Post Posted: Sep/10/2019 at 1:37pm
Well he could clock it differently, MAYBE? 
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Post Options Post Options   Thanks (0) Thanks(0)   Quote CHAR Quote  Post ReplyReply Direct Link To This Post Posted: Sep/10/2019 at 2:09pm
I already had an alignment problem.  it only 50 miles before a brand new belt was chewed through.  The alt.  Had this deep V pulley that the alternator shop guy said looked like it came off a tractor, so it had to go.  I havent had a chance to drive it with the new pulley yet.

I can clock it (again)  spun the back once 90 already to get the sensing and idiot light plug off the block face, I just didnt notice how close the stud was to the block until this time when a tried a ratchet wrench I just got for my B day.  Guess its always been close.   Prob. take a grinder after it next time it comes out.
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Post Options Post Options   Thanks (0) Thanks(0)   Quote billd Quote  Post ReplyReply Direct Link To This Post Posted: Sep/10/2019 at 4:13pm
Why hasn't anyone else asked you this question - 
Who is she and who is the stud?
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Post Options Post Options   Thanks (0) Thanks(0)   Quote CHAR Quote  Post ReplyReply Direct Link To This Post Posted: Sep/10/2019 at 4:20pm
Nyuck, Nyuck, Nyuck.  thats a good one, Mo!
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