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  1. #1
    Member
    Join Date
    Oct 2011
    Posts
    31
    Location
    Manitoba, Canada
    Tractor
    Taskmaster 432e

    Default Voltage Regulator

    Good morning,

    I finally determined that my regulator is the problem with my charging system but now I'm having trouble figuring out which regulator is the right one to use!! The regulator on the tractor is a JFT-149 (looks to be original but I've only had the tractor 2 years so might have been changed previously) but the manual says the regulator to use is a JFT-141. I called up Lakeview Equipment Sales in Alberta and they say their book shows FT-111 is the correct regulator to use. Do you know if all 3 of these interchangeable? The tractor is a 2003 TaskMaster 432e.

    Matt

  2. #2
    Super Member greg_g's Avatar
    Join Date
    Dec 2003
    Posts
    6,086
    Location
    Western Kentucky
    Tractor
    JD3720 Cab, 300X loader with 4-in-1 bucket

    Default Re: Voltage Regulator

    To me, a 12v DC external voltage regulator is a 12v DC external voltage regulator. Pretty sure any of those 3 numbers would work. If the FT111 is the handiest to obtain, that's the one I'd go for.

    //greg//
    USN (Ret)
    Former Chinese tractor owner (x4)
    Current John Deere owner

  3. #3
    Veteran Member Bob Rooks's Avatar
    Join Date
    Feb 2007
    Posts
    2,419
    Location
    Bothell & Silverdale, WA
    Tractor
    Yuchai Bulldozer

    Default Re: Voltage Regulator

    I agree with Greg.
    Yuchai 306R dozer, Mustang 2040 skid steer, Mitsubishi MS035 Mini-Ex with four buckets and a rake, 7' Dual Dozer with dual Trimble GCR-2 laser receivers.

  4. #4
    Member
    Join Date
    Oct 2011
    Posts
    31
    Location
    Manitoba, Canada
    Tractor
    Taskmaster 432e

    Default Re: Voltage Regulator

    Alright, sounds good. I ordered the JFT-149 so we'll see if it makes the difference. Thanks for your input!!

  5. #5
    Silver Member
    Join Date
    May 2006
    Posts
    121
    Location
    Campbell, CA
    Tractor
    Yuchai Dozer

    Default Re: Voltage Regulator

    My only suggestion is watch out for the wattage rating. If the '111 regulator looks much smaller than the one you've got, ask more questions. I higher rating would never hurt.

  6. #6
    Member
    Join Date
    Oct 2011
    Posts
    31
    Location
    Manitoba, Canada
    Tractor
    Taskmaster 432e

    Default Re: Voltage Regulator

    Ok, So I got my new regulator today (the same one that is on the tractor right now). Changed it out but there in no difference in the amount of charge according to the ampmeter. I had taken the alternator off previously and had new brushes put on but the place I took it to said that it was charging fine even before the new brushes. They had suggested the regulator but that's apparently not the problem either. Any suggestions as to what to check next? The battery that is on the tractor is old, probably original, but wouldn't the ampmeter still show that is it charging correctly even with an old battery or is the ampmeter showing what charge the battery is taking? Any suggestions would be much appreciated. Thanks!!

  7. #7
    Gold Member Smalljobs's Avatar
    Join Date
    Mar 2009
    Posts
    317
    Location
    Massachusetts
    Tractor
    Jinma 284

    Default Re: Voltage Regulator

    Is there any chance one or more of the regulator connectors are corroded?
    Steve Anderson

    Jinma 284LE w/Creeper/Koyker 160 Loader/Markham Toothbar, Frame mounted HWO4X backhoe, 64" John Deere 3 PH Snow blower,3 PH splitter, Bro-Tek thumb, Jinma 8" chipper, Loader mounted Meyer plow

  8. #8
    Elite Member BobRip's Avatar
    Join Date
    Sep 2004
    Posts
    4,335
    Location
    Powhatan Va.
    Tractor
    2000 Power Trac 422

    Default Re: Voltage Regulator

    Quote Originally Posted by matthoffman33 View Post
    Ok, So I got my new regulator today (the same one that is on the tractor right now). Changed it out but there in no difference in the amount of charge according to the ampmeter. I had taken the alternator off previously and had new brushes put on but the place I took it to said that it was charging fine even before the new brushes. They had suggested the regulator but that's apparently not the problem either. Any suggestions as to what to check next? The battery that is on the tractor is old, probably original, but wouldn't the ampmeter still show that is it charging correctly even with an old battery or is the ampmeter showing what charge the battery is taking? Any suggestions would be much appreciated. Thanks!!
    An ampmeter is not a good choice to monitor the alternator. Put a voltmeter on the battery. It should read about 14.2 volts if the battery is fully charged. charge the battery first. What were your initial symptoms?
    Bob Rip
    Tell me and I will hear.
    Show me and I will see.
    Let me do and I will learn.
    Let me fail and I will understand.

  9. #9
    Platinum Member
    Join Date
    Nov 2008
    Posts
    802
    Location
    US Virgin Islands
    Tractor
    Jinma JM304

    Default Re: Voltage Regulator

    You really need to have a cheap multimeter to diagnose electrical problems. My Jinma had a crappy terminal block that the regulator plugged into and it was always causing problems - I finally just replaced the alternator with an internally-regulated Delco 12-Si and got shut of the issue, but I needed a bigger alternator due to work lights and such I added.

    The alternator output at 1200+ rpm should be around 14-16 volts, with no load. The battery should show 12.6 - 13.2 volts when charged and not under load. If you meter the battery while the engine is running at 1200+ rpm and get less than 14.2 volts or so, then there is an issue in the charging system -either the alternator or regulator or wiring. From there, you simply use the meter to trace the wiring down and find the fault.

  10. #10
    Member
    Join Date
    Oct 2011
    Posts
    31
    Location
    Manitoba, Canada
    Tractor
    Taskmaster 432e

    Default Re: Voltage Regulator

    So I took some readings this morning and this is what I came up with:

    Battery with tractor off - 12.1
    Battery @ 1200 rpm - 12.1
    Battery @ 2000 rpm - 12.8

    Alternator @ 1200 rpm - 13.5
    Alternator @ 2000 rpm - 14.2

    So everything seems to be lower than what you're saying it should be. Is the alternator for this tractor just underpowered or is there more to it than that? Initial symptoms were loss of power when I have more than one set of lights on. They are all factory lights except for one extra set. The rotation of the chute for my snowblower is also run off of a small electric motor. I can barely run one set of lights while operating the tractor after dark.

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