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  1. #1
    Member
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    Oct 2011
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    42
    Tractor
    Kubota L3400

    Default Changing Antifreeze L3400 - Capacity is short

    I just changed the antifreeze in my L3400. Did it per the kubota manual. The amount drained was only a gallon and it only took a gallon to fill it again. Kubota Spec says it should be 1.6 gallons. Seems obvious that there was a 1/2 gallon left in the engine block. So how do you drain the block and how come Kubota doesnt tell say how to drain the block?

    Any thoughts?

  2. #2
    Elite Member WilliamBos's Avatar
    Join Date
    May 2004
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    4,473
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    Innisfil, Ontario, Canada
    Tractor
    MF 1635 12x12 Powershuttle

    Default Re: Changing Antifreeze L3400 - Capacity is short

    Change it again in the spring. Assuming it will get rebular use over the winter, it will be well mixed by spring.
    Thanks,

    Will


    I do not care if someone's net nanny is watching!! You need to stop...

  3. #3
    Super Star Member k0ua's Avatar
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    Jun 2009
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    14,001
    Location
    Branson, Mo.
    Tractor
    Kioti DK35se Hydrostat

    Default Re: Changing Antifreeze L3400 - Capacity is short

    This is just an hypothetical idea.. You could either forget about the .6 gallons and go on. or you could do this:
    Go buy undiluted antifreeze not the 50/50 mix stuff. Then drain the gallon out, and put 1 gallon of water in. Run engine a minute or two, stop and drain this water/diluted antifreeze mixture out and discard. fill with water, run for a bit, drain and discard, do until the drained looks like water. Then add .6 gallons of pure antifreeze,into the tractor take the remainder of the jug, and mix 50/50 with water, and fill up the tractor with this.. Now you have a 50/50 mix and no appreciable amount of old antifreeze in the block. OR.. you could get a flush and fill kit to flush out the block, and then fill as per my last instruction. Do as you see fit.

    James K0UA
    James KUA

    Kioti DK35se hydrostat with 2 QA buckets, 48 inch. King Kutter Rotary Cutter. 750 lbs ballast box. Loaded tires, Construction Attachments SSQA Lightweight Pallet forks. EA 50 inch single lid "wicked" Grapple. Satisfied Everlast PA160 welder owner How to add a link to a post . Best way to search TBN


  4. #4
    Elite Member Chilly807's Avatar
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    Sep 2009
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    3,198
    Location
    Nova Scotia
    Tractor
    Kubota L3400DT

    Default Re: Changing Antifreeze L3400 - Capacity is short

    I changed mine about a year ago, had the same problem. I did pretty much what James suggested and kept adding water and running it briefly until I had almost clear water coming out. Then added pure AF and some water to get the right mix. I did have to drain a little off and adjust the mixture a couple times to get it exactly where I wanted on the freeze tester.

    Be careful not to get it too hot between refill and drain, the last thing you want is cold water going into a hot engine block.

    Sean

  5. #5
    Silver Member
    Join Date
    Nov 2007
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    134
    Location
    PA
    Tractor
    Kubota L4740,B3030,ZD326,RTV 900,L4200

    Default Re: Changing Antifreeze L3400 - Capacity is short

    I have five different kubota's, all different models with different engines. On everyone there is a rubber hose that connects to the right side of the engine (when sitting on tractor), I remove the hose clamp and pull the hose off, that drains the entire block, I also use it to back flush the block using a gargen hose.

  6. #6
    Member
    Join Date
    Oct 2011
    Posts
    42
    Tractor
    Kubota L3400

    Default Re: Changing Antifreeze L3400 - Capacity is short

    Thanks all for the advice. I guess they'll all work. I like 2007's the best. My tap water has a lot of lime in it so I always mix distilled water with the antifreeze. That would make it a bit easier on the amount of water I need.

    Thanks again!

  7. #7
    Bronze Member
    Join Date
    Oct 2011
    Posts
    96
    Location
    Missouri
    Tractor
    Kubota BX-25

    Default Re: Changing Antifreeze L3400 - Capacity is short

    Quote Originally Posted by outoftractorluck
    kubota Spec says it should be 1.6 gallons. Seems obvious that there was a 1/2 gallon left in the engine block.
    Maybe the .6 gallons is to fill the recovery tank up between L and H?
    Last edited by NevadaMOGuy; 11-22-2012 at 07:23 PM. Reason: Typed more stuff.
    Kubota BX25:
    Wix Filters: Oil-51365, Hyd-57088, Air-46449, Fuel-33972
    Lucas Red-N-Tacky Grease, Rotella T6 5w40 engine oil, Orscheln Universal Heavy Duty Hydraulic & Transmission Fluid

  8. #8
    Super Member 94BULLITT's Avatar
    Join Date
    Feb 2011
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    7,020
    Location
    Frederick County, VA
    Tractor
    Kubota BX2360 & L4240 HSTC

    Default Re: Changing Antifreeze L3400 - Capacity is short

    I think there should be a drain on the block.

  9. #9
    Elite Member Chilly807's Avatar
    Join Date
    Sep 2009
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    3,198
    Location
    Nova Scotia
    Tractor
    Kubota L3400DT

    Default Re: Changing Antifreeze L3400 - Capacity is short

    Quote Originally Posted by NevadaMOGuy View Post
    Maybe the .6 gallons is to fill the recovery tank up between L and H?
    Interesting that the L3400 DT (gear) has no recovery tank, while the HST version does... I have no idea why they are different though.

    Sean

  10. #10
    Bronze Member
    Join Date
    Oct 2011
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    96
    Location
    Missouri
    Tractor
    Kubota BX-25

    Default Re: Changing Antifreeze L3400 - Capacity is short

    Quote Originally Posted by Chilly807
    Interesting that the L3400 DT (gear) has no recovery tank, while the HST version does...
    Weird.
    So the radiator cap just vents outside?
    Kubota BX25:
    Wix Filters: Oil-51365, Hyd-57088, Air-46449, Fuel-33972
    Lucas Red-N-Tacky Grease, Rotella T6 5w40 engine oil, Orscheln Universal Heavy Duty Hydraulic & Transmission Fluid

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