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Thread: Pony Motor to Main Ratio D47U

  1. 12-02-2006, 02:59 PM #1
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    D4Jim
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    Default Pony Motor to Main Ratio D47U

    Does anyone know or remember the ratio of the gearing from the pony motor to the main on a D47U? I have it somewhere but can't find it. I'm not sure I am smart enough to calculate it from the teeth on the gear train!!
    D4Jim
    D47U (1950), 3U 112 Grader (1949), Cat 40 Scraper ACMOC Member 14 years
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  2. 12-02-2006, 06:09 PM #2
    Old Magnet
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    Him Jim,
    Pony starting engine to main engine ratio for the D4 is 10.75 to 1.
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  3. 12-02-2006, 11:09 PM #3
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    D4Jim
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    Many thanks OM. I'll write it down where I can find it!!
    D4Jim
    D47U (1950), 3U 112 Grader (1949), Cat 40 Scraper ACMOC Member 14 years
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