Alternator on 1105

Hooked180 · Jun 19, 2021

I put a new alternator(I think it is a 42 amp) on my 1105 Massey w/o a cab and the gauge goes clear over to 60. The alternator gets very hot and after I turn the tractor off it stays hot until I take the hot wire off. What is going on with it?

old · Jun 19, 2021

Sounds like you got your self a bad new alternator simple as that

casecollectorsc · Jun 19, 2021

Sounds like the regulator is grounded out...someone didn't insulate one screw. Had one do the same and the battery blew up.

Hooked180 · Jun 19, 2021

Thanks ,I hope your correct.

old · Jun 19, 2021

Not uncommon now days. Most of the time I have a new/rebuilt alternator checked before I even leave the parts store

rrlund · Jun 20, 2021

Why would you think so without testing it? If it's not a single wire self exciter and it's putting out 60 amps, it's way more likely a regulator problem.

RodinNS · Jun 20, 2021

So the regulator cutout is not cutting out. The question is why? Does the battery also get hot? I think I'd start by taking a current clamp and pulling the fuses one at a time and see where all that current is going. You obviously have a ground somewhere. It could be a bad battery. It could also be a dead short in the alternator or regulator. That said, you burnt an alt already and this one is enroute to the same fate so I'd wager the problem is somewhere in the electrical system. So start isolating loads and narrow down where/when the current is going to ground with a clamp. I doubt the new alt is bad but you never know.

Rod

wore out · Jun 20, 2021

(quoted from post at 08:33:26 06/20/21) So the regulator cutout is not cutting out. The question is why? Does the battery also get hot? I think I'd start by taking a current clamp and pulling the fuses one at a time and see where all that current is going. You obviously have a ground somewhere. It could be a bad battery. It could also be a dead short in the alternator or regulator. That said, you burnt an alt already and this one is enroute to the same fate so I'd wager the problem is somewhere in the electrical system. So start isolating loads and narrow down where/when the current is going to ground with a clamp. I doubt the new alt is bad but you never know.

Rod

" So the regulator cutout is not cutting out."

There's NO "cutout" in the voltage regulator that would be used with either type of alternator that would have been used here.

wore out · Jun 20, 2021

(quoted from post at 17:59:50 06/19/21) I put a new alternator(I think it is a 42 amp) on my 1105 Massey w/o a cab and the gauge goes clear over to 60. The alternator gets very hot and after I turn the tractor off it stays hot until I take the hot wire off. What is going on with it?

Lets start at the beginning, WHAT alternator do you have?

One source shows a Delco 10DN being used with the earlier versions with Waukesha engines and Delco 10SI being used with Perkins engines.

Or, has it been converted to something else, a "one-wire" alternator, perhaps?

old · Jun 20, 2021

And now days the V.R. is in the alternator so again bad alternator

centash · Jun 20, 2021

but you can change the regulator in less than a minute.....just did mine last month.

Ben

old · Jun 20, 2021

I wouldn't but then again the alternators I buy have life time warranties on them and f I did change the V.R. that makes the warranty void

Alternator on 1105

Hooked180

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old

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casecollectorsc

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Hooked180

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old

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rrlund

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RodinNS

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wore out

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wore out

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old

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centash

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