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Thread: Belly Numbers

  1. #1
    Join Date
    Nov 2018
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    Reno NV
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    Default Belly Numbers

    I have some J/JD cases that have different types of belly numbers.

    The earlier cases have two letters before the number sequence, while the later ones have a self explanetary two numbers for year stamped format.

    My question is do the earlier letter codes relate to any years that they were stamped, similar to transmission date stamping.

    Thanks

  2. #2
    Join Date
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    North Hills, CA and Pine Grove, CA
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    Default

    I bet George Hood can answer that.
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  3. #3
    Join Date
    Apr 2010
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    Default

    I had 2 1915 J motors,early & late & the bottom numbers looked like different format from each other
    An early 1920s right case on my wall has B3 space 890 bottom number..my clock!

  4. #4
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    Nov 2018
    Location
    Reno NV
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    Default

    I have a set of cases labeled XO-xxx belly no, with a 25JD engine no.
    Also a drive case with a H4-xxx belly no and a 24JD engine no.

  5. #5

    Default

    The number after the letter is a year code. It is the year in which the line bore number was STAMPED and could be a year earlier than the model year of the engine.
    Your X0 / 25JD case is a mystery. Can you post a pic of the vin and the line bore number?
    Is it a large base case? Does the vin look factory or like a re-stamp?
    Mark

  6. #6
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    Apr 2010
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    Default

    Thanx Mark,I thought this was a 23 case

  7. #7
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    Nov 2018
    Location
    Reno NV
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    Default

    Quote Originally Posted by MMasa View Post
    The number after the letter is a year code. It is the year in which the line bore number was STAMPED and could be a year earlier than the model year of the engine.
    Your X0 / 25JD case is a mystery. Can you post a pic of the vin and the line bore number?
    Is it a large base case? Does the vin look factory or like a re-stamp?
    Mark
    Thanks mark, I will get a photo later today.

  8. #8
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    Nov 2018
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    Reno NV
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    Default

    Here are some Photos of my 25JD cases.
    I suspect the X0 belly number is correct as a set of 1920 cases.
    The VIN no boss looks to have been removed at some stage and restamped, or it is a set of replacement cases that were stamped by the dealer.
    20191025_150320.jpg20191025_150302.jpg

  9. #9
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    Default

    [QUOTE=aumick10;184764]Here are some Photos of my 25JD cases.
    I suspect the X0 belly number is correct as a set of 1920 cases.
    The VIN no boss looks to have been removed at some stage and restamped, or it is a set of replacement cases that were stamped by the dealer.


    It is definitely a number job.
    Be sure to visit;
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  10. #10
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    Nov 2018
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    Default

    I though it was after I measured the cylinder studs. It is a small base case that I don't think existed in 20, If the XO is a 1920 belly no.

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