Go Bottomburning out Regulators
 | danjameskelly
Join Date: Jun 2004 Posts: 6 Tennessee 
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2009-01-10 159294
Once a year I change out regulators.
First the light comes on, then a week later the regulator smokes.
Alternator is fine, Battery is fine
Can I get a better regulator then the RS5101?
Any ideas what's up?
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 | earthwrks
Join Date: Dec 2003 Posts: 3853 Home Office in Flat Rock, Michigan 
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2009-01-10 159296
Could be just bad parts and/or marginal design.
I Googled your part number and it seems several manufacturers use it too like Kubota and Grasshopper mowers.
Another company makes a direct replacement. Cut and paste this link. It's pricey at $118. But it may solve the problem.
http://www.jsesc.com/Catalog/Product.aspx?PRODUCT=C0EC5196-A3DB-11D4-A5CD-006097DA9B5A ....
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 | auerbach
Join Date: Sep 2007 Posts: 2168 West of Toronto
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2009-01-11 159298
If you've been jump-starting your machine by shorting at the starter, there's a possibility this pooches the regulator. Are not solid-state regulators immune from failure? ....
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| earthwrks
Join Date: Dec 2003 Posts: 3853 Home Office in Flat Rock, Michigan
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2009-01-11 159320
Auer, forgive us but there's only a handful of Canadians here...what the heck is "pooches"? Do you mean "poaches"?
Or are you like our redneck friend Kenny Thompson and just make up words as you go? :P ....
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 | Murf
Join Date: Dec 1999 Posts: 7249 Toronto Area, Ontario, Canada
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2009-01-12 159349
Jeff, "pooch" as in something is pooched, or something pooches on you, is sort of the civilian version of FUBAR.
It's a really common expression in my experience, and I've heard it used much more in the US than in up here in Cannuckistan.
BTW, I think the etymology of the word goes back to the old 'screw the pooch' saying, thus something not right or broken was 'pooched'.
As for the problem itself, I've seen that before. It is usually related to one of two problems. The first is corrosion or poor contacts in the battery circuit that result in higher than normal resistance. The second is the addition of 'aftermarket' accessories like work lights and other high load items.
Most smaller tractors only have a small alternator, usually only a 40 amp one. To put that in perspective, 40 amps at 12 volts is 480 watts. Most 'standard' 12 volt flood lights are 55 watt bulbs, the bigger 'off road' style are 100 watts or more. At that rate 8 55 watt bulbs or 4 100 watt bulbs are almost full capacity for a 40 amp alternator.
On my own unit at home it has 2 headlights, and 4 work lights, each 55 watts. That is 27.5 amps, and there is still the wipers (front and rear) electric defoggers, the blower for the heater, A/C clutch and few other odds and ends still to go. It adds up fast.
Best of luck.
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| earthwrks
Join Date: Dec 2003 Posts: 3853 Home Office in Flat Rock, Michigan
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2009-01-12 159362
Screw the pooch eh? Hmm you guys need more constructive things to keep you busy up 'der! Never heard that before, and I have (French)Canadian blood too.
I might be talking out my "Kenny T"---but maybe I'm missing something---but if a 40amp alternator charges a battery, and the regulator only limits the voltage not the amps (right?), that would mean any draw over the 40 amps the alternator puts out would eventually drain the battery--but not ruin the regulator. Wrong? ....
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| rj1108
Join Date: Jan 2009 Posts: 3 newport washington
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2009-01-12 159378
I have a 4100 too with a bad regulator and the weird think is that I have spoken with three dealers and not one of them can tell me where the voltage regulator is located on this tractor. I have never had this problem before so I have never had the pleasure of looking for it. Can someone send me in the right direction? ....
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| auerbach
Join Date: Sep 2007 Posts: 2168 West of Toronto
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2009-01-13 159393
EW, I thought "screw[ing] the pooch" was a high-tech Americanism, having been introduced to it in the film "The Right Stuff." ....
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| Murf
Join Date: Dec 1999 Posts: 7249 Toronto Area, Ontario, Canada
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2009-01-13 159395
EW, without turning this into a lecture in electrical theory.....
An alternator cannot 'make' DC, it makes AC which then goes through a rectifier to make it into DC voltage. The AC voltage they make also increases and decreases according to RPM. Now it must have a regulator as well to limit the output to about 14.5 volts. In most small alternators on the tractor we have, they use a combined bridge rectifier/regulator unit. This allows 'both sides' of the AC wave form to be converted into useable DC and at a safe voltage.
Now, if the battery is low on charge or being drained (as you pointed out) then all of the alternator's output will be used to charge it up. This generates a lot of heat and shortens the units life, sometimes dramatically.
If however the battery is fully charged (~14 V.) then the charging is reduced to a trickle and making barely any heat compared to full load charging.
One notorious example of this is the GM alternator with the internal rectifier that burns up if all you do is run the vehicle with a dead battery, just a few minutes of charging and it will burn up. Being internal that means a few hundred bucks to swap out the alternator for a 're-manufactured' unit when all it needs is a $0.05 part replaced.
Best of luck.
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 | kwschumm
Join Date: Feb 2003 Posts: 5764 NW Oregon
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2009-01-13 159403
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For many years on cars and trucks the regulator has usually been built into the alternator, usually as an assembly that screws on the back side. Your tractor is likely the same. ....
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| auerbach
Join Date: Sep 2007 Posts: 2168 West of Toronto
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2009-01-13 159406
What advantage does a solid-state regulator have over a non-solid-state one?
(I didn't know that a poor battery strains the regulator -- that's useful info.) ....
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| rj1108
Join Date: Jan 2009 Posts: 3 newport washington
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2009-01-13 159411
Thanks for the quick response. Just fyi I did locate the regulator and it is under the right side kickpanel under the fuel tank, just not where any of the dealers said it was. The alternator is not an internal regulated unit. The regulator is about a $60.00 part from aftermarket sellers on the web. ....
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| kwschumm
Join Date: Feb 2003 Posts: 5764 NW Oregon
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2009-01-13 159414
Wow. Wonder why they used an external regulator. I'll have to dig out the tech manual and see if the 4310 is the same. ....
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| ashleyd
Join Date: Oct 2016 Posts: 2 Annaba
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2016-10-05 195850
My father has a tractor of the last model! [url=http://bigpaperwriter.com/blog/americanism-essay]http://bigpaperwriter.com/blog/americanism-essay[/url] has an essay about Americanism, read it and find out whether you are a patriot of not!
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