1026r alternator question
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    Mr. Moose's Avatar
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    1026r alternator question

    Does anyone know or can find out at what rpm's the alternator is producing what amps?


    Mr. Moose
    1026R TLB Born on Nov 13, 2012; adopted Mar 6, 2013
    RC2048 Rotary Cutter, JD 47" Quick-Hitch Snowblower, JD 54" Quick-Hitch Blade, JD 3-pt Trailer Hitch, HLA Pallet Forks, Heavy Hitch Receiver Hitch Plate, Superwinch S5000

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    fuelhog2000's Avatar
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    I "think" its around 20 to 30 amps. Not very powerful but not many accessories either. It should produce max power just off idle.
    2011 1026R 54"MMM, D120 loader w/snowbucket and bucket quick attach conversion, 5' bush hog, middlebuster, 260 backhoe
    Remember: Too tight is two pieces

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    Quote Originally Posted by fuelhog2000 View Post
    I "think" its around 20 to 30 amps. Not very powerful but not many accessories either. It should produce max power just off idle.
    Close, but it is actually a 40 amp alternator. Theoretically,fuelhog is correct, and the alternator should be sized to produce full output around 2000 RPM (engine speed). It should be producing anywhere between 13 and 16 volts at idle, and possibly up to 18 volts at max RPM, however this is a bit difficult to calculate due to the engine RPM being reduced by the pulley diameter on the crank shaft, then increased at the pulley on the alternator. Both of these pulley's would need to be measured so the rpm can be calculated at the alternator shaft to conclude where min/max outputs can be achieved.
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    Mr. Moose's Avatar
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    Ok, so max charging is theoretically at 2000 rpm. Would this be true if I were to get the optional 55 amp alternator? I was hoping someone had a multimeter capable of checking over 40 DC amps?


    Mr. Moose
    1026R TLB Born on Nov 13, 2012; adopted Mar 6, 2013
    RC2048 Rotary Cutter, JD 47" Quick-Hitch Snowblower, JD 54" Quick-Hitch Blade, JD 3-pt Trailer Hitch, HLA Pallet Forks, Heavy Hitch Receiver Hitch Plate, Superwinch S5000

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    Myasis Dragon's Avatar
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    Optional 55 amp?

    I didn't realize there was an optional 55 amp alternator. I'll have lock that little tidbit of information in the back of my mind in case mine ever fails. I've never stopped to figure up my power usage, but I'll bet I could get close 55 amps with enough additions.
    Just call me Jon, not Myasis Dragon (Hint: My a** is draggin') 2013 1025r FILB (Factory installed loader & Backhoe - 260 & H120), 60D mower w/electric over hydraulic (independent) lift, R4 tires, psrumor's seat springs, Kenny D's bolt-on hooks, bxpanded piranha tooth bar on a 49" bucket and a 61" bucket for snow and light material, County Line post hole digger, County Line landscape rake, counterfeit JD box scraper, homemade 4' x 8' farm wagon, Fimco 30 gallon 3ph sprayer.

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    56FordGuy's Avatar
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    What have you added or what are you thinking about adding that will require a larger alternator?
    -Blake

    Your mileage may vary.

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    Myasis Dragon's Avatar
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    Electrical additions?

    Quote Originally Posted by 56FordGuy View Post
    What have you added or what are you thinking about adding that will require a larger alternator?
    My sprayer has an electric pump. More lights. A cab with heat/blower and a windshield wiper would be nice someday. More lights. An electric fan for those hot summer days would be "cool". More lights. An inverter to run a power tool out in the fields. More lights.
    Levi likes this.
    Just call me Jon, not Myasis Dragon (Hint: My a** is draggin') 2013 1025r FILB (Factory installed loader & Backhoe - 260 & H120), 60D mower w/electric over hydraulic (independent) lift, R4 tires, psrumor's seat springs, Kenny D's bolt-on hooks, bxpanded piranha tooth bar on a 49" bucket and a 61" bucket for snow and light material, County Line post hole digger, County Line landscape rake, counterfeit JD box scraper, homemade 4' x 8' farm wagon, Fimco 30 gallon 3ph sprayer.

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    fuelhog2000's Avatar
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    Quote Originally Posted by 56FordGuy View Post
    What have you added or what are you thinking about adding that will require a larger alternator?
    Heated seat!
    2011 1026R 54"MMM, D120 loader w/snowbucket and bucket quick attach conversion, 5' bush hog, middlebuster, 260 backhoe
    Remember: Too tight is two pieces

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    xcopterdoc's Avatar
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    You can try and measure alternator output all you want but until you put a load on it you wont be able to measure the amperage out put. You will need to load it down and see if it reaches its max output at WOT.
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    Quote Originally Posted by fuelhog2000 View Post
    Heated seat!
    Hi Fuelhog,

    I got a generic heated seat to try this winter. Will let you know how it works. I'm sure it won't work as well as a cab, but it sure is cheaper.

    Rich
    Green Man likes this.
    2012 1026R TLB, Countyline 3pt splitter, EMP QA Snowplow.

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