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  1. #1
    Silver Member
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    Sep 2009
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    126
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    Kentucky
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    Kubota B7100

    Default Oil capacity B7100 vs dipstick

    I changed the oil in my B7100 yesterday, first time I had done it. The oil was well above the full mark on the dipstick when I got it. I drained the old oil, put on a new filter and filled it with oil, ran it and checked the dipstick. Shows right at the upper line on the dipstick. The thing is that it only took about three quarts (around 3/4 of a one gallon jug). The manual specs the oil capacity at 4.1 quarts. I know sometimes there is a difference between the "oil change" amount and the "engine rebuild" capacity, because you never get all the old oil out, but this seems like a lot to me.

    By the way, my tractor is a 1984 HST-e and the specs I was looking at are from the non-HST B7100, but I'm thinking the motors should be the same, and so the oil capacity as well, right?

    Can anybody shed light on this?

  2. #2
    Elite Member Chilly807's Avatar
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    Sep 2009
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    3,167
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    Nova Scotia
    Tractor
    Kubota L3400DT

    Default Re: Oil capacity B7100 vs dipstick

    Is there only one drain plug? My L3400 has two drain plugs, one on each side of the front drive shaft "tunnel" in the oil pan. If it has two and you only removed one, it leaves a significant amount of old oil in the pan.

    Sean

  3. #3
    Silver Member
    Join Date
    Sep 2009
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    126
    Location
    Kentucky
    Tractor
    Kubota B7100

    Default Re: Oil capacity B7100 vs dipstick

    Great question, Sean. I'll check that. I'm flying blind on this, so any help appreciated.

  4. #4
    Silver Member
    Join Date
    Oct 2010
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    146
    Location
    Wisconsin
    Tractor
    Kubota M7040SUD

    Default Re: Oil capacity B7100 vs dipstick

    Funny, I just posted something similar, but kind of the opposite issue. I changed the oil, put in the stated capacity, but the oil level is halfway between full and add on the dipstick. Anyway, my tractor (kubota M7040SUD) is the same as another posted with two oil drain plugs, one on each side of the front drive shaft. The oil pan cavity on each side is substantial and if your tractor is that way, it could very well explain the discrepancy between the capacity and what she'd swallow.

  5. #5
    Veteran Member kevinj's Avatar
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    Jul 2003
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    1,307
    Location
    West MI
    Tractor
    BX-1860, L3940HSTC, B7500, Farmall M, Farmall 560D

    Default Re: Oil capacity B7100 vs dipstick

    My B holds about 3 qts
    Kevin

    BX1860, mower, snowblower - B7500HST, FEL, Bush Hog - Grand L3940 HSTC, FEL, snowblower, 6' Landpride brush hog, 6' King Kutter tiller, Corn Pro 18+5 Fifth Wheel, 1950 Farmall M, Farmall 560D

  6. #6
    Silver Member
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    Sep 2009
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    126
    Location
    Kentucky
    Tractor
    Kubota B7100

    Default Re: Oil capacity B7100 vs dipstick

    I see only one drain plug. My B7100 is two wheel drive, so there is no front drive shaft to create the kind of double-bowl oil pan you described.

  7. #7
    Elite Member Chilly807's Avatar
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    3,167
    Location
    Nova Scotia
    Tractor
    Kubota L3400DT

    Default Re: Oil capacity B7100 vs dipstick

    We had a thread here a while back about oil capacities, it revolved around the advertised capacity being to the top of the acceptable range, at the mid-point, or the bottom. I guess it comes down to if you're satisfied that the old oil drained fully and the dipstick reads the new oil level correctly, the manual may not be gospel

    Sean

  8. #8
    Silver Member
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    Sep 2009
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    126
    Location
    Kentucky
    Tractor
    Kubota B7100

    Default Re: Oil capacity B7100 vs dipstick

    There is also the consideration of there being a fair accumulation of gunk that doesn't drain, I suppose.

  9. #9
    Elite Member Chilly807's Avatar
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    Nova Scotia
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    Kubota L3400DT

    Default Re: Oil capacity B7100 vs dipstick

    Quote Originally Posted by Bluelick View Post
    There is also the consideration of there being a fair accumulation of gunk that doesn't drain, I suppose.
    Unless it's in really poor shape, I doubt you have enough buildup to actually notice a difference.

    Sean

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