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  1. #1
    Bronze Member
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    Default How often to change gearoil in BH rotary cutter SQ172?

    I changed the 80w90 gear oil in a friend's Bush Hog rotary cutter (SQ172) last year in May and has approximately 12 hours on it. Manual gives no schedule on changing the oil just refill to bring level to check plug hole. How often should this gear oil be changed?

  2. #2
    Veteran Member
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    Jul 2014
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    1,647
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    Guin, AL
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    Kubota L3200 w/LA524 FEL, Loaded rear tires, LP RCR 1860 5' Cutter, LP RTA 1258 5' Tiller, LP PFL 2042 Pallet Forks w/60" Extensions

    Default Re: How often to change gearoil in BH rotary cutter SQ172?

    My LP BH says the same thing. Just refill, nothing about changing the oil.
    US Air Force Retired (1966-1988) ... mike

  3. #3
    Veteran Member
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    Dec 2003
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    1,813
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    GA, TN
    Tractor
    Kubota L4330HST

    Default Re: How often to change gearoil in BH rotary cutter SQ172?

    I plan to change the gearbox lube in my BH286 every time the bottom seal gets taken out by a stray piece of barbed wire.

  4. #4
    Gold Member
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    Sep 2013
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    451
    Location
    Miccosukee, FL
    Tractor
    JD 855, NH575E

    Default Re: How often to change gearoil in BH rotary cutter SQ172?

    How often have you changed the oil in the differential on your vehicles? I only change gear oil when repairs are made. Never done as preventative maintenance but it won't hurt anything but your wallet to do it.


    SH

  5. #5
    Veteran Member
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    Parker, CO
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    Kubota L3200hst

    Default Re: How often to change gearoil in BH rotary cutter SQ172?

    I change mine every few years, maybe 4-5 or so, unless it gets contaminated with anything, especially water (looks like hot chocolate or a milkshake).

  6. #6
    Bronze Member
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    Sep 2009
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    58

    Default Re: How often to change gearoil in BH rotary cutter SQ172?

    Quote Originally Posted by Fallon View Post
    I change mine every few years, maybe 4-5 or so, unless it gets contaminated with anything, especially water (looks like hot chocolate or a milkshake).
    That is what the original gear oil looked like when I drained it last year. I think I will go ahead and change it again since the last change may also still contain some contaminants. After that I will go to every other year. Thanks for everyone's feedback!

  7. #7
    Elite Member
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    Mar 2005
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    2,688
    Location
    Bedford, VA
    Tractor
    John Deere 2320

    Default Re: How often to change gearoil in BH rotary cutter SQ172?

    I changed mine over to a full synthetic after the first year of use..

    Now I pull the top off the gear box and look at it before every use - but i only change it when it starts to look milky (from water contamination, due to condensation im guessing)

    b
    Bedford, VA
    2320 w/ 62D MMM, 200CX FEL, Pats EZ Change, LX4 Cutter
    Co-owner (with my father) of John Deere 790, 30 HP, 4x4, 513 cutter, 70 FEL
    2012 Nissan Xterra Pro-4x

  8. #8
    Gold Member
    Join Date
    Dec 2010
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    381
    Location
    Maine
    Tractor
    JD 3520

    Default Re: How often to change gearoil in BH rotary cutter SQ172?

    If you're worried about a lot of contaminants, you can always give it a wash and rinse with fuel oil, then put good oil back. I believe many oil changes are based more on ritual and marketing than lubricant performance. Unless it gets dirty, your average joe just doesn't put the time and heat in to break modern lubricants down. Now if its a "daily driver" someone's making their money on, then changes are cheap insurance... if not I'd just watch the level and make sure its clean. Change it when it worries you.

  9. #9
    Elite Member RalphVa's Avatar
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    Dec 2003
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    4,521
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    Charlottesville, VA, USA
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    JD 2025R, previously Gravely 5650 & JD 4010 & JD 1025R

    Default Re: How often to change gearoil in BH rotary cutter SQ172?

    I used my oil extractor to suck the oil out. Need to do it right after it's been used a little bit, to get the oil warmed up. Otherwise, the extractor won't work.

    Ralph
    The natural gardener
    God's original intent

  10. #10
    Veteran Member jack707's Avatar
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    Nov 2013
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    1,137
    Location
    up North wisconsin
    Tractor
    farm trac 555

    Default Re: How often to change gearoil in BH rotary cutter SQ172?

    I have a few things I could use

    A transfer pump a turkey baster.

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