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  1. #1
    New Member
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    Mar 2013
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    2
    Location
    iron ridge
    Tractor
    1080 Massy ferguson

    Default Alternator question 1080 Massy Ferguson

    1080 Massy Ferguson 1970 year 318 Diesel engine. Bought tractor and the previous owner replaced the alternator with one with out track drive. Went back to the original so the tack works again like it should. Have the right alt on but it seem like the tack is showing faster than it is really going. The hour meter is moving but not sure of what rpm to run at to see if it is accurate. I would think at PTO speed.

    Hear is my question! What is the correct diameter pulley?
    2 question at what RPM does the alternator start charging?

  2. #2
    Super Star Member murphy1244's Avatar
    Join Date
    Nov 2011
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    15,833
    Location
    Ohio
    Tractor
    Kioti DK 40-Massey ferguson 135-Ventrac 4500 Diesel

    Default Re: Alternator question 1080 Massy Ferguson

    Welcome from Ohio, should start to charge at 600 rpm
    Murph ------------

  3. #3
    Elite Member The kid's Avatar
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    Apr 2012
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    Tennessee Vols Country
    Tractor
    My tractor is an old M... F... and red too.

    Default Re: Alternator question 1080 Massy Ferguson

    Welcome to TractorByNet. What diameter was the old one vs new one? What came original on the tractor. Genny or alternator?

    To verify your tachdrive vs engine rotation, you will need a digital laser tachometer. I've seen them for a low as $35 on ebay. Model airplane pilots will use these to tune their engines. Search Digital Laser Photo Tachometer. Or not worry about it and use the RPM that works best for you. I replaced my old Genny and tachdrive with an alternator w/tachdrive. Not really worried if the RPM's don't match exactly. I will use the RPM that works the best. Are you sure the tach runs off the alternator and not somewhere on the block?. -kid
    Last edited by The kid; 03-30-2013 at 09:41 PM. Reason: correction.
    Retired and enjoying life with my kids and grandkids -robert
    "life is too short.. eat your cake first"
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  4. #4
    New Member
    Join Date
    Mar 2013
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    2
    Location
    iron ridge
    Tractor
    1080 Massy ferguson

    Default Re: Alternator question 1080 Massy Ferguson

    Thanks guys for the response so far. The tractor cam with alternator just dont know what diameter the pully should be. If I cant get any clear answers on this. I will look into the Digital Laser Photo Tachometer. Thanks

  5. #5
    Elite Member The kid's Avatar
    Join Date
    Apr 2012
    Posts
    3,840
    Location
    Tennessee Vols Country
    Tractor
    My tractor is an old M... F... and red too.

    Default Re: Alternator question 1080 Massy Ferguson

    Here's one on eBay cheap.
    Digital Laser Photo Tachometer

    I may get one of these for the toolbox -kid
    Retired and enjoying life with my kids and grandkids -robert
    "life is too short.. eat your cake first"
    My 1965 MF 135 Z145 Refurbish Project with Pics
    TrucksByNet.com .... .... It's about Trucks... The other TBN
    My Yamaha YFP350U Terrapro's Project The only ATV with a PTO
    About ME

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