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  1. #1
    Member
    Join Date
    Jan 2009
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    42
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    North Windham CT
    Tractor
    BX 2350

    Default Loader makes strange hissing sound

    Hey everyone just got a new LA243 loader on my 3yr. old BX2350 today but Im thinking I might have a problem with it. After warming up and using the tractor, when I bring the loader down from a up position it sounds like ahissing or air escaping from a vent only on the right side of the tractor mainly in the lines. There is no leaks and will do it even when the tractor is off. Another thing that worries me is I check the Hyd. fluid after I shut off the machine and it filled with tiny air bubbles. All the power seems to be there when I was using it today but not sure if this is normal. Is it fluid running out of the cylinder when bringing the loader down? The dealer is sending a mechanic in the a.m. to take a look at it. Any thoughts would be appreciated.

  2. #2
    Super Member
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    Apr 2000
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    6,236
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    central New York
    Tractor
    all makes and models

    Default Re: Loader makes strange hissing sound

    Air can get in a smaller whole then oil can come out!

  3. #3
    Super Star Member k0ua's Avatar
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    Jun 2009
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    15,706
    Location
    Branson, Mo.
    Tractor
    Kioti DK35se Hydrostat

    Default Re: Loader makes strange hissing sound

    Quote Originally Posted by RMatty View Post
    Hey everyone just got a new LA243 loader on my 3yr. old BX2350 today but Im thinking I might have a problem with it. After warming up and using the tractor, when I bring the loader down from a up position it sounds like ahissing or air escaping from a vent only on the right side of the tractor mainly in the lines. There is no leaks and will do it even when the tractor is off. Another thing that worries me is I check the Hyd. fluid after I shut off the machine and it filled with tiny air bubbles. All the power seems to be there when I was using it today but not sure if this is normal. Is it fluid running out of the cylinder when bringing the loader down? The dealer is sending a mechanic in the a.m. to take a look at it. Any thoughts would be appreciated.
    Loaders make a sort of hissing sound when you let the arms fall under gravity alone, by pushing the loader control all the way forward past the detent position into the "float" position. so you are not powering down but "floating down" are you doing that? there are 2 positions in the loader contol foward direction powered and float.. the sound is not real loud, but maybe this is what you are hearing?

    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
    Member
    Join Date
    Jan 2009
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    Location
    North Windham CT
    Tractor
    BX 2350

    Default Re: Loader makes strange hissing sound

    I hear the sound when in float and when im powering down the arms also.

  5. #5
    Super Star Member k0ua's Avatar
    Join Date
    Jun 2009
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    15,706
    Location
    Branson, Mo.
    Tractor
    Kioti DK35se Hydrostat

    Default Re: Loader makes strange hissing sound

    Well all hydraulics make some sound, but I am not there to know what you are hearing, so let them look at it and go from there.
    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


  6. #6
    Elite Member
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    Sep 2008
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    3,272
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    NE USA
    Tractor
    JD LA115, WH 244, WH 525 hydro-pops,Original Troy Built Horse 8 HP

    Default Re: Loader makes strange hissing sound

    Quote Originally Posted by RMatty View Post
    Hey everyone just got a new LA243 loader on my 3yr. old BX2350 today but Im thinking I might have a problem with it. After warming up and using the tractor, when I bring the loader down from a up position it sounds like ahissing or air escaping from a vent only on the right side of the tractor mainly in the lines. There is no leaks and will do it even when the tractor is off. Another thing that worries me is I check the Hyd. fluid after I shut off the machine and it filled with tiny air bubbles. All the power seems to be there when I was using it today but not sure if this is normal. Is it fluid running out of the cylinder when bringing the loader down? The dealer is sending a mechanic in the a.m. to take a look at it. Any thoughts would be appreciated.
    You have a pair of starved hydraulic cylinders.

    You need to just bide your time and use the
    loader and the air bubbles will eventually be
    gone and then no worries.

    It hoovers of course but they apparently did
    not bother to run the loader and add oil
    or fill the cylinders before hand.

  7. #7
    Elite Member Tx Jim's Avatar
    Join Date
    Jan 2007
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    North Texas
    Tractor
    JD 4255/Kubota M7040 HDC

    Default Re: Loader makes strange hissing sound

    IMHO the hissing sound you hear is normal. My 2000 model M4900/LA1002 makes that sound. It's oil passing through an orifice. If oil wasn't regulated then when loader valve was moved forward into ether down or float position the bucket would immediately fall to the ground ie not go slowly down.

  8. #8
    Member
    Join Date
    Jan 2009
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    42
    Location
    North Windham CT
    Tractor
    BX 2350

    Default Re: Loader makes strange hissing sound

    Thats exactly what the mechanic said toady. Better safe than sorry I guess.

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