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Thread: poor steering on international 956xl

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    poor steering on international 956xl

    I have a 956xl that has gone very hard to steer changed filters fitted a s/h obital unit fitted new hydraulic pump <tandom> and still no better does anybody have a wordshop manuel or info on the filter setup it has three canister two a the back have filters in and the one at the front has awire gauze type filter

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    Senior Member Gapples's Avatar
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    Re: poor steering on international 956xl

    Have you had the front jacked up to see if the king pins are not tight ? Its a long shot but can happen, also while jacked up & if king pins seem OK turn steering without engine running, using only obitrol pump to turn the wheels, does this work OK ?
    That 3 filter set up is sense o draulic, the 2 back filters are hydraulic & steering, the front one is the pilot pressure valve for the sense o draulic.
    This filter set up is called the combined filter, this because when you lift the working lever or pull back the remote valve it combines the flow of both main hydraulic pump & steering pump for faster flow.
    Although I never come across a problem with this unit it would be possible for it restrict or stop flow to the steering, perhaps if the solonoid were to stick for example.
    Also when you fitted a second hand obitrol did you fit the original block on the front of it ? This contains the steering relief valve, worth getting the steering pressure checked, can't remember off the top of my head what the pressures are but I would say for a 2 wheel drive around 1500psi, 4wd about 2400psi or there about, but check from someone with a manual.

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    Re: poor steering on international 956xl

    jacked the tractor up tested the king pins stub axles and the power steering ram and thats is ok but need a bit more info to the filter and valve layout before stripping the obital unit doesn't havea block bolted to it

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    Re: poor steering on international 956xl

    thanks everybody problem found to be part of a backing ring stuck in vavle on sence o draulics

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    Senior Member robbie956xl's Avatar
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    Re: poor steering on international 956xl

    Quote Originally Posted by springer View Post
    thanks everybody problem found to be part of a backing ring stuck in vavle on sence o draulics
    My 956xl (1985 Red/cream model with sensodraulics), has the same problem and none of the experts have yet been able to tell me where to look.

    Is it possible for you to explain more clearly where you found this blockage. A picture would be very useful.

    Thank you in advance,

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    Senior Member Huffy's Avatar
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    Re: poor steering on international 956xl

    Quote Originally Posted by Gapples View Post
    Have you had the front jacked up to see if the king pins are not tight ? Its a long shot but can happen, also while jacked up & if king pins seem OK turn steering without engine running, using only obitrol pump to turn the wheels, does this work OK ?
    That 3 filter set up is sense o draulic, the 2 back filters are hydraulic & steering, the front one is the pilot pressure valve for the sense o draulic.
    This filter set up is called the combined filter, this because when you lift the working lever or pull back the remote valve it combines the flow of both main hydraulic pump & steering pump for faster flow.
    Although I never come across a problem with this unit it would be possible for it restrict or stop flow to the steering, perhaps if the solonoid were to stick for example.
    Also when you fitted a second hand obitrol did you fit the original block on the front of it ? This contains the steering relief valve, worth getting the steering pressure checked, can't remember off the top of my head what the pressures are but I would say for a 2 wheel drive around 1500psi, 4wd about 2400psi or there about, but check from someone with a manual.
    Humour me for a minute Gapples , but on the 84 74 series ,isn't the steering relief valve on the MCV outlet for the steering ?
    (I once changed a complete MCV block with a sticking priority flow divider valve ,for one off a scrapper. The steering was crap on start up after changing it over and the relief valve was damaged by fire )
    So the 956 relief valve is on the orbital ? Interesting
    My money would be on the relief valve

  7. #7
    Senior Member Gapples's Avatar
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    Re: poor steering on international 956xl

    Huffy

    Yes, the power steering RV is in the MCV on the 74/84 series, on Robbies red/cream 956 I'm guessing although sens o draulic it hasnt got the combi filter arrangement Robbie ?
    If not have a look behind the engine for a block with a pipe going to the orbitrol & feeding in, this will be a flow divider, they did cause this problems, I never ever come across a RV causing a steering issue on a 56 series, although thats not to say they couldn't

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    Senior Member robbie956xl's Avatar
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    Re: poor steering on international 956xl

    Still unclear ?. Where is the "sensodraulic" where I had understood the blockage was likely ?.

  9. #9
    Senior Member Gapples's Avatar
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    Re: poor steering on international 956xl

    Robbie the very early sens o draulic systems didn't have a combi filter arrangement, on the rhs of the engine are your hydraulic filters & sens o draulic unit in one block or mounted separate ?
    The ones in one block are combi & can combine the flow of both pumps on the aux valves & main lift ( work ) lever.

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    Senior Member robbie956xl's Avatar
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    Re: poor steering on international 956xl

    Quote Originally Posted by Gapples View Post
    Robbie the very early sens o draulic systems didn't have a combi filter arrangement, on the rhs of the engine are your hydraulic filters &amp; sens o draulic unit in one block or mounted separate ?<br>
    The ones in one block are combi &amp; can combine the flow of both pumps on the aux valves &amp; main lift ( work ) lever.
    <br> Here is a picture of the right side of my tractor. I am unclear what the sensodraulic unit is or looks like.



    image hoster
    http://<a href="http://postimg.org/i...age hoster</a>/956_tractor_after_painting_009.jpg?noCache=1432466 014 unit is or what it looks like.

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    Senior Member Gapples's Avatar
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    Re: poor steering on international 956xl

    That is the early sens o draulic type, not the combi filter type.
    Please post a picture looking down behind the engine, between the engine & the bulkhead if can ?

  12. #12
    Senior Member robbie956xl's Avatar
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    Re: poor steering on international 956xl

    Quote Originally Posted by Gapples View Post
    That is the early sens o draulic type, not the combi filter type.Please post a picture looking down behind the engine, between the engine & the bulkhead if can ?
    Thanks for that Gapples. I will have to get such a picture taken. Will probably not see tractor until Tuesday. I will post when I get the picture.

  13. #13
    Senior Member robbie956xl's Avatar
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    Re: poor steering on international 956xl

    Quote Originally Posted by robbie956xl View Post
    Thanks for that Gapples. I will have to get such a picture taken. Will probably not see tractor until Tuesday. I will post when I get the picture.
    picture of behind the engine of the 956xl.
    [url=http://postimage.org/]upload pi
    image hostc[
    free image host/url]d motor;

  14. #14
    Senior Member Gapples's Avatar
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    Re: poor steering on international 956xl

    Robbie
    If that valve unit has pipes leading the steering obitrol as suspect it does its a flow divider, if so these were a regular cause of tight steering on the earlier 955's.
    Worth taking off & cleaning, if I remember correctly they have a small or I face that can get blocked or partially blocked causing problems.

  15. #15
    Senior Member robbie956xl's Avatar
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    Re: poor steering on international 956xl

    Quote Originally Posted by Gapples View Post
    Robbie
    If that valve unit has pipes leading the steering obitrol as suspect it does its a flow divider, if so these were a regular cause of tight steering on the earlier 955's.
    Worth taking off & cleaning, if I remember correctly they have a small or I face that can get blocked or partially blocked causing problems.
    Thanks for that "Gapples". I will have a go at the flow divider valve as you say. "Springer" said that he found a blockage in the "sensodraulics valve". Is this one and the same thing, or if not, where exactly is the sensodraulic valve ?.

  16. #16
    Senior Member Gapples's Avatar
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    Re: poor steering on international 956xl

    Yours is an earlier model Robbie, the later sens o draulic had a combined filter unit & that's where he found his problem.

  17. #17
    Senior Member robbie956xl's Avatar
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    Re: poor steering on international 956xl

    Thanks for the help Gapples. I understand now.

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    Re: poor steering on international 956xl

    Quote Originally Posted by Gapples View Post
    Yours is an earlier model Robbie, the later sens o draulic had a combined filter unit & that's where he found his problem.
    If I may join in here?

    I have a machine the same as Robbie above, we have lost any lift on the lift arms but still have steering and spool pressure. Would appreciate any tipis on where to start.

    many thanks

  19. #19
    Senior Member Gapples's Avatar
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    Re: poor steering on international 956xl

    Quote Originally Posted by milkloss View Post
    If I may join in here?

    I have a machine the same as Robbie above, we have lost any lift on the lift arms but still have steering and spool pressure. Would appreciate any tipis on where to start.

    many thanks
    Sorry just picked up this post, have got sorted now ?

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