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CAT 955C Alternator

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9 years 3 months ago #122550 by ShawnP
CAT 955C Alternator was created by ShawnP
Hey guys,

I was wondering if anyone can tell me where the alternator is located on the 955C and if it's a pain in the butt to change or if it's something I can do myself out in the field?

Thanks in advance!

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9 years 3 months ago #122552 by d9gdon
Replied by d9gdon on topic Not an alternator
Unless it's been changed to an alternator, it came from the factory with a generator.

My 955E came with direct electric start, so it has a 24V generator. It's located on the RH side of the engine and is gear driven.

Now for your question about changing it out; if you're sitting there looking at the machine and are having trouble locating the generator then you will need some help taking it off, but if you haven't yet tried to locate it and just wondering out loud then it's a really simple job. It's way easier than adjusting the clutch.

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9 years 3 months ago #122563 by ShawnP
Replied by ShawnP on topic CAT 955C Alternator
It very well may have an electric generator.. I haven't looked into it too hard. Machine starts and runs fine with a full battery for approximately 5 starts and then when you go to started again it won't Click to try and turn over.

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9 years 3 months ago #122567 by AJ.
Replied by AJ. on topic Generator
If its got a generator you could try polarizing it,find the BAT and the ARM terminals on the voltage regulator,switch on the key,use a piece of wire and momentarily connect the two terminals,just tip them together like cracking a match,start up and check.
AJ

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9 years 3 months ago #122570 by Old Magnet
Replied by Old Magnet on topic CAT 955C Alternator
Better determine whether you have a "A" circuit or "B" circuit generator before you do that. If it's a Delco generator use AJ's method. If it's a American Bosch generator it's a "B" circuit. To polarize disconnect the field wire from the regulator and momentarily strike it on the "Bat" wire of the regulator.

Not correctly polarizing the generator will cause the points in the voltage regulator to stick and burn. Probably why your batteries are getting drained. Can also cause serious damage to the generator.

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9 years 3 months ago #122580 by ShawnP
Replied by ShawnP on topic CAT 955C Alternator
Thank you both for the great information. Do either of you have access to wiring diagram for the generator or regulator?

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9 years 3 months ago #122585 by Old Magnet
Replied by Old Magnet on topic CAT 955C Alternator
Assuming this is direct electric start, not pony motor...

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9 years 3 months ago #122609 by ShawnP
Replied by ShawnP on topic CAT 955C Alternator
Can you guys tell me where the regulator is on a 955C 12A-539?

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9 years 3 months ago #122615 by Old Magnet
Replied by Old Magnet on topic CAT 955C Alternator
It's usually mounted right next to or on the generator. Seems you need to spend a little time familiarizing yourself with the machine

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9 years 3 months ago #122619 by ShawnP
Replied by ShawnP on topic CAT 955C Alternator

It's usually mounted right next to or on the generator. Seems you need to spend a little time familiarizing yourself with the machine


I certainly agree with you OM. Unfortunately I have A very Limited time with the machine since it's at my hunting property an hour away. I'm trying to maximize every minute I can when I get to work on it on weekends. I really do appreciate your help

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