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  1. #1

    Default farm pro 2425 alternator

    Hey guys I dont seem to be charging anymore on my farm pro 2425. I thought it might be the battery but not sure now. I took a meter and with the tractor running I put the leads on the battery terminals and only shows a little over 10 volts. I also touched the biggest wire coming off the back of the alternator and the other to a ground with the same response. Can the alternator be checked this way? So would this be a bad alternator?

  2. #2
    Silver Member
    Join Date
    Jul 2010
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    147
    Location
    Saskatoon, SK, Canada
    Tractor
    foton 254

    Default Re: farm pro 2425 alternator

    Sounds like bad grounds! Check your main ground for the battery, I've ran into ground problems on my foton 254 with similar issues to yours. You need good clean contacts. If it's the alternator I use to have which was only rated for 14 amps than the alternator could be a possibility. I upgraded mine as well as my grounds and everything works just fine.

  3. #3

    Default Re: farm pro 2425 alternator

    Quote Originally Posted by succor View Post
    Sounds like bad grounds! Check your main ground for the battery, I've ran into ground problems on my foton 254 with similar issues to yours. You need good clean contacts. If it's the alternator I use to have which was only rated for 14 amps than the alternator could be a possibility. I upgraded mine as well as my grounds and everything works just fine.
    What did you upgrade yours with?

  4. #4
    Platinum Member
    Join Date
    Mar 2007
    Posts
    648
    Location
    British Columbia, Canada
    Tractor
    1959 MF-65 sold, 2007 Jinma 554 diesel.

    Default Re: farm pro 2425 alternator

    First, I would replace the voltage regulator with a new one and see if it works properly. That would be a cheap fix if that is the problem. The regulators seem to be a frequent problem on these tractors.

    Jim
    2007 Jinma 554 tractor, FEL, 8ft Rear Blade, 73" Snowblower, 2002 3500 Dodge Ram 4x4, 1986 F250 4x4 SC 6.9 turboed diesel.

  5. #5
    Veteran Member Bob Rooks's Avatar
    Join Date
    Feb 2007
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    2,267
    Location
    Bothell & Silverdale, WA
    Tractor
    Yuchai Bulldozer

    Default Re: farm pro 2425 alternator

    True, the OEM alternator are only rated at 14 amps, BUT they are Totally Enclosed Fan Cooled (TEFC) alternators which are very desirable to have. Most all high end equipment have these. You can get a new Motorola/Prestolite TEFC 12v 55 amp alternator for around $400.00. That being said, a lot of folks have installed the Delco 10Si or 12Si one-wire automotive alternator in place of the OEM. It has the same footprint and mounts and it bolts right in. You will have to find a smaller pulley to fit the Delco because the diesel engines don't spin them fast enough to get satisfactory results. You will also have to eliminate your ammeter and install a volt meter. There is only a small wiring change necessary.
    But like the others have stated, check ALL of the grounding connections.
    Yuchai 306R dozer, Mustang 2040 skid steer, Mitsubishi MS035 Mini-Ex with four buckets and a rake, Trimble equipped 7' Dual Dozer with twin GCR-2 laser receivers, and a LiTW BH7600 back hoe (sold).

  6. #6
    Advertiser
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    Mar 2004
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    1,336
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    Texas

    Default Re: farm pro 2425 alternator

    We keep both the voltage regulators and theOEM replacement alternators in stock, I also have a few upgraded alternators a 350 watt or a 500 watt upgrade.I too see alot more bad voltage regulators than alternators.Let us know if we can help you

    Tommy
    Affordable Tractor Sales
    "Your Jinma Parts Superstore"
    Home of compact Jinma, Foton, and Koyker Tractors and Parts, Wood Chippers, Backhoes - Affordable Tractor Sales Company

  7. #7

    Default Re: farm pro 2425 alternator

    Even it it is a bad ground some place wouldnt I still get 14 volts with a meter touching the heaviest wire and touch a ground with the other?

  8. #8
    Veteran Member Bob Rooks's Avatar
    Join Date
    Feb 2007
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    2,267
    Location
    Bothell & Silverdale, WA
    Tractor
    Yuchai Bulldozer

    Default Re: farm pro 2425 alternator

    Quote Originally Posted by ymurf View Post
    Even it it is a bad ground some place wouldnt I still get 14 volts with a meter touching the heaviest wire and touch a ground with the other?
    No. The output wire on the alternator reads battery voltage. You still need a good ground at the battery to complete the circuit.
    It is also true that you still may need a voltage regulator and/or alternator.
    Yuchai 306R dozer, Mustang 2040 skid steer, Mitsubishi MS035 Mini-Ex with four buckets and a rake, Trimble equipped 7' Dual Dozer with twin GCR-2 laser receivers, and a LiTW BH7600 back hoe (sold).

  9. #9
    Elite Member RonMar's Avatar
    Join Date
    May 2005
    Posts
    2,760
    Location
    Port Angeles WA
    Tractor
    Jinma 284 delivered 06/28/05

    Default Re: farm pro 2425 alternator

    Not sure what year your tractor is, but this may help.

    http://www.tractorbynet.com/forums/a...inmawiring.jpg

    If you are seeing battery voltage on the output wire on the alternator, either the alternator field/stator is at fault, or more likley the regulator is not feeding current to the field to generate alternator output. Why the reg is not doing that is the real mystery. Garbage in = garbage out, so along that line you need to make sure the regulator has good connections and all it's inputs. There is a REG fuse on the fuse panel that powers the regulator. If the regulator is on the newer style power panel(uses blade style automotive fuses), it is the little module with heatsync fins plugged in right beside the fuse panel. Mine actually vibrated loose once and I almost lost it if I hadn't noticed it at a weird angle when I stopped to clean the radiator filter while brushhogging. It now has a large ziptie securing it in place...
    Ron

  10. #10

    Default Re: farm pro 2425 alternator

    Quote Originally Posted by RonMar View Post
    Not sure what year your tractor is, but this may help.

    http://www.tractorbynet.com/forums/a...inmawiring.jpg

    If you are seeing battery voltage on the output wire on the alternator, either the alternator field/stator is at fault, or more likley the regulator is not feeding current to the field to generate alternator output. Why the reg is not doing that is the real mystery. Garbage in = garbage out, so along that line you need to make sure the regulator has good connections and all it's inputs. There is a REG fuse on the fuse panel that powers the regulator. If the regulator is on the newer style power panel(uses blade style automotive fuses), it is the little module with heatsync fins plugged in right beside the fuse panel. Mine actually vibrated loose once and I almost lost it if I hadn't noticed it at a weird angle when I stopped to clean the radiator filter while brushhogging. It now has a large ziptie securing it in place...
    Tractor is a 2003..From the prices I am seeing on new alternator from farmpro I may try and swap it out for the gm one.My wiring is a nightmare anyway. Half the stuff dont work and the other stuff like the dash lights has never even been hooked up since new.No wires even going to them for lights. Fuel gauge lasted till about 2007, Then I did a fuel fill up to full.If I fill up to the fill neck it will leak where it goes into the tank.The fuel gauge quit then.The needle that shows voltage has never worked either.And this tractor has only 140 hours on it.

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