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  1. #1
    Veteran Member
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    Dec 2009
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    1,093
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    Kansas...USA
    Tractor
    Kubota B2620 (2012)

    Default B 2620 HST/Hydraulic Fluid Change

    Okay so I tried the "Search Function". Forget that. In draining the HST filter oil outlet and the Hydraulic filter oil outlet, I get only 2 gallons. The book specifies the capacity as 4 gallons. So I looked for the other elusive drain plugs in the rear end. Let's see??? It looks like most of the bolts are holding the rear end together. Since I own a parts manual, I looked there to see if there is any identification of such. The manual show to likely bolts but calls them "flange bolts"...not drain plugs. Well I loosened one on either side and the oil does drain out. So the job is done. But the Owners Manual sure didn't help me much. Can anybody else confirm my expericence or tell me where I went wrong? Thanks.........Mike........Oh Yeah.......watch out for the little steel ball that is spring loaded on the HST side drain plug.
    Kubota B2620 HST

  2. #2
    Platinum Member kcender's Avatar
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    Mar 2010
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    644
    Location
    Nova Scotia
    Tractor
    B2620 GR2120

    Default Re: B 2620 HST/Hydraulic Fluid Change

    I don't have enough hours on my B2620 yet to do the service but thanks for the heads up on the drain plug,good to know.

  3. #3
    Veteran Member
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    Kansas...USA
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    Kubota B2620 (2012)

    Default Re: B 2620 HST/Hydraulic Fluid Change

    Thank you kcender....Surely someone has changed out the HST/Hydraulic fluid on the B2620.....will have to wait and see. I was changing mine early just to see how it goes and because I have been pushing it pretty hard with the mowing and using the FEL ( have 150 hrs on it). And besides, I already had purchased the Super UDT in 2009 when owing the BX, which was traded in 2012 for the B2620. The Super UDT isn't available anymore since the Super UDT "2" came out.
    Kubota B2620 HST

  4. #4
    Gold Member vic4news's Avatar
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    May 2007
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    285
    Location
    Merrimack County, NH
    Tractor
    Kubota B3030

    Default Re: B 2620 HST/Hydraulic Fluid Change

    It sounds like you found all the drain plugs. I'm not familiar with the B2620, but on the B2630,B3030 there are three drain plugs. One for the transmission and one on each side of the rear axle housing.

    Vic

  5. #5
    Veteran Member kuboman's Avatar
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    Dec 2009
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    2,018
    Location
    Canada
    Tractor
    B3200, L5740,

    Default Re: B 2620 HST/Hydraulic Fluid Change

    There should not be any spring loaded steel ball in the drain plug. You must have pulled out something else
    You can tell the drain plug as it is centered between 2 mounting bolts and if you look carefully you will see it only screws into the outer housing and not both inner and outer. It also will have a brass or aluminum washer.
    Last edited by kuboman; 08-25-2013 at 10:37 AM.
    L5740 LA854 loader
    L3130 LA723 loader sold
    B3200 LA504 loader
    B1550 sold
    B2620 sold
    B4200 sold
    F2680E
    GF1800
    Kubota RTV900
    JD 850D Gator sold
    JD F935 x 2 sold
    JD 310D TLB
    Gehl 602 excavator

  6. #6
    Veteran Member
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    Dec 2009
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    1,093
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    Kansas...USA
    Tractor
    Kubota B2620 (2012)

    Default Re: B 2620 HST/Hydraulic Fluid Change

    Thanks kuboman. I just studied the Owner Manual again, and really think I followed it for both the HST and Hydraulic filter drain plugs. I did find the ( one left /one right) axle housing bolts that are for drain purposes when I did the work originally....but they were not all that obvious to me. I took some pictures this morning and hope to struggle through to get them posted.

    I think it was "John Thomas", TBN member, who said that one should be cautious about taking it as gospel from those that don't have the exact same kubota model. For example, I believe it was an Orange Tractor tutorial that talked about a strainer on the B2620. Mine doesn't have a strainer.....at least the manual doesn't say so...and I've never found one.

    Cheers, Mike
    Kubota B2620 HST

  7. #7
    Veteran Member
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    Kubota B2620 (2012)

    Default Re: B 2620 HST/Hydraulic Fluid Change

    B 2620 HST/Hydraulic Fluid Change-img_0673.jpgClick image for larger version. 

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ID:	334073B 2620 HST/Hydraulic Fluid Change-img_0674.jpgB 2620 HST/Hydraulic Fluid Change-img_0675.jpg Well, it took longer to post these pictures than it did to drain the fluid. Apparently I was not suppose to remove the bolt at the base of the HST filter (the one with the spring and ball). So I stand corrected.....I did not follow the OE manual. Thus it looks like the bolt at the base of the mid PTO (17 mm) and the (12 mm) middle bolt on on either side of the rear axle case are the three that one removes to do a complete fluid drain. Am I stupid, blind or just hard headed. Thanks everybody. Mike
    Kubota B2620 HST

  8. #8
    Super Member JOHNTHOMAS's Avatar
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    Apr 2008
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    5,527
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    Somerset, Ky
    Tractor
    currently own F3080 F2680 B2620 FEL/BH RTV1140

    Default Re: B 2620 HST/Hydraulic Fluid Change

    Quote Originally Posted by oldballs View Post
    Click image for larger version. 

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ID:	334073Click image for larger version. 

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ID:	334075 Well, it took longer to post these pictures than it did to drain the fluid. Apparently I was not suppose to remove the bolt at the base of the HST filter (the one with the spring and ball). So I stand corrected.....I did not follow the OE manual. Thus it looks like the bolt at the base of the mid PTO (17 mm) and the (12 mm) middle bolt on on either side of the rear axle case are the three that one removes to do a complete fluid drain. Am I stupid, blind or just hard headed. Thanks everybody. Mike
    Thanks for info.
    As you age and millions of bits of data go thru your brain to be processed, stored and or deleted you'll delete/store some good and bad data. When you return to do this job again 2/3/4/5/6 years from now you may have co-mingled/deleted this data. I'd suggest, since I've had this happen a lot and it's getting more frequent the further away I get from July 1947, that you put some white or black or whatever other color paint you have on the heads of the bolts that need to be removed. Looks clean enough now to hold paint.
    2012 B2620 FEL BH, 2008 F2680 2WD 72" side Discharge Deck, 2012 F3080 4WD 72" rear discharge deck, 2010/2009 RTV1140CPX , RatchetRake, Forks, ...DEARBORN 2 BOTTOM PLOW 12" ?? FOR SALE $425).... Drawbar and Horse Drawn disk 13 Toyota Tacoma Double Cab, 13 Ford Flex. 2009 Subaru Impreza Sport

  9. #9
    Veteran Member kuboman's Avatar
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    Canada
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    B3200, L5740,

    Default Re: B 2620 HST/Hydraulic Fluid Change

    So in your last 2 pictures there is a drain on your mid pto and the other picture the drain is the one between the 2 outer mounting bolts. Both sides are identical.
    L5740 LA854 loader
    L3130 LA723 loader sold
    B3200 LA504 loader
    B1550 sold
    B2620 sold
    B4200 sold
    F2680E
    GF1800
    Kubota RTV900
    JD 850D Gator sold
    JD F935 x 2 sold
    JD 310D TLB
    Gehl 602 excavator

  10. #10
    Veteran Member kuboman's Avatar
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    Canada
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    B3200, L5740,

    Default Re: B 2620 HST/Hydraulic Fluid Change

    Looks like you found the right ones in the pictures. I believe you are correct that you do not have strainer. I thought my 3200 did not have one too because of the the 2620 I had before but discovered I was wrong with careful investigation and some smarter than me members here.
    L5740 LA854 loader
    L3130 LA723 loader sold
    B3200 LA504 loader
    B1550 sold
    B2620 sold
    B4200 sold
    F2680E
    GF1800
    Kubota RTV900
    JD 850D Gator sold
    JD F935 x 2 sold
    JD 310D TLB
    Gehl 602 excavator

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