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Thread: Volvo EC15B swinging problem by arm move down

  1. #1
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    Volvo EC15B swinging problem by arm move down

    Hello,

    I - or exactly my excavator - have/has the following Problem: When I move the arm down, the whole excavator Begins to swing. This is only by moving down. At moving up there is no Problem. And at moving down the swinging Begins only at a slow or medium move. I took a look to the mechanic, if there is something worn and has too much mechanical Play. But it seems, as this is not the case. What do you think? Air in the hydraulic? Let me know.

    regards wowe

  2. #2
    Tartan paint and sky hook specialist Muz's Avatar
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    Welcome to the forum .. how long have you had the machine ? ..15B is not that old a machine ... was it always like this ?
    Please don't PM me for plant advice.. thanks Post in the forum where I will gladly help, as will many of our contributors.. as the info and responses will help lots of others, which is why we exist

  3. #3
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    Old machine? Hm... but younger than me. I bought it some days ago.

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    Building Site Manager ianoz's Avatar
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    With a highly uneducated guess , it sounds like a control valve problem , Or if pilot controlled , maybe a faulty lever control , if the two funtions are on the same lever .

  5. #5
    Tartan paint and sky hook specialist Muz's Avatar
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    Quote Originally Posted by wowe View Post
    Old machine? Hm... but younger than me. I bought it some days ago.
    So theres a good chance someone has messed around with the hydraulics.
    Do you mean to the the whole boom going up and down ? or just the dipper ? and I take it you mean the whole machine is slewing ? or do you mean its moving the boom off set ?
    Please don't PM me for plant advice.. thanks Post in the forum where I will gladly help, as will many of our contributors.. as the info and responses will help lots of others, which is why we exist

  6. #6
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    I made a video:


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    Building Site Manager ianoz's Avatar
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    OK , looks like what you where trying to descrble was lost slightly in the translation. I see Muz also thought the same as I . Only thing comes to mind after seeing the video is if it is fitted with hose burst protection valve , and it it causing the problem .
    Muz may have a better idea now after seeing the video .

  8. #8
    Tartan paint and sky hook specialist Muz's Avatar
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    Yes we thought you meant swing as in 'slew' .. So the boom is just jerky when you are lowering it ...possibly a faulty/broken spring on the valve block on the return side of the hoist ram, ... but simple things first !! take the cap off the hydraulic tank (under the left arm rest) and look inside, is the tank full of frothy oil ?
    Please don't PM me for plant advice.. thanks Post in the forum where I will gladly help, as will many of our contributors.. as the info and responses will help lots of others, which is why we exist

  9. #9
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    I took a look at the hydraulic level. At the hydraulic tank there is a plastic cap, where the oil level should be. But there is no oil visible. I took a meter and did a measurement. The oil-Level is 13cm (about 5 Inch) below the should stand. I think this is a lot. I will refill the oil and then we will see. By the way: The reason, because I checked the Level not yet, was, that the seller said, the digger got a new service...

    regards wowe

  10. #10
    Tartan paint and sky hook specialist Muz's Avatar
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    Quote Originally Posted by wowe View Post
    I took a look at the hydraulic level. At the hydraulic tank there is a plastic cap, where the oil level should be. But there is no oil visible. I took a meter and did a measurement. The oil-Level is 13cm (about 5 Inch) below the should stand. I think this is a lot. I will refill the oil and then we will see. By the way: The reason, because I checked the Level not yet, was, that the seller said, the digger got a new service...

    regards wowe
    Ok , the oil level should half fill the glass on the front of the tank with the boom lowered to the ground .. get it to that level and we go from there, it may be under filled or over filled, and the glass will look a solid colour either way
    Please don't PM me for plant advice.. thanks Post in the forum where I will gladly help, as will many of our contributors.. as the info and responses will help lots of others, which is why we exist

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