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bobcat 843 hydraulic oil and engine oil question

Discussion in 'Skid Steers' started by brennandc, Dec 19, 2012.

  1. brennandc

    brennandc New Member

    Joined:
    Dec 19, 2012
    Messages:
    4
    Location:
    MN
    The service manual for my (1988) 843 bobcat says you can use 5W30 motor oil for hydraulic fluid. So my question is, it OK to use a full synthetic or synthetic blend of this oil? What would any pros or cons be? Also, I can't seem to find what type of oil is spec-ed for the ISUZU engine (54 HP 4 cylinder) Anyone know? Thanks!
     
  2. Bobcatdan

    Bobcatdan Well-Known Member

    Joined:
    May 16, 2012
    Messages:
    241
    Location:
    wisconsin
    15w40 in the engine. As the hydraulic, bobcat use to say 10w30 could be used in a case of emergncy, but always pushed the use as bobcat hydraulic/ hydrostatic. I know plenty of farms that solely run 10w30 with no problems. I don't think there would be any gain in running synthetic in the hydraulic
     
  3. firedude26

    firedude26 Active Member

    Joined:
    Dec 23, 2010
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    Location:
    se mich
    my manual for my 743b says 10w30 in hyd, only advantage i see for using syn in hyd is if you was in a cold climate. i used syn in crank case that helps alot on cold starts. i need to add hyd fluid to it and was wondering samething, since i bought it used im not sure what is actually in it.
     
  4. crewchief888

    crewchief888 Senior Member

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    Feb 2, 2012
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    NWI
    as of 2006 bobcat no longer recommends engine oil in the hyd/hydrostatic system.

    engine oil formulas have drastically changed over the years, as have some hyd oil formulas


    :drinkup
     
  5. firedude26

    firedude26 Active Member

    Joined:
    Dec 23, 2010
    Messages:
    35
    Location:
    se mich
    so reg hyd fluid is used now? or is there a special kind of hyd fluid? i wanna change the fluid and filter in this machine, just so i know whats in it.
     
  6. willie59

    willie59 Super Moderator

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    Occupation:
    Service Manager
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    Knoxville TN
    A good quality AW hyd oil will work fine. Being in SE Michigan, might want to use AW32.
     
  7. crewchief888

    crewchief888 Senior Member

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    Location:
    NWI
    bocat hyd oil, along with bobcat filters is all i can recommend


    :drinkup