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1993 l150 volvo boom drift

Discussion in 'Wheel Loaders' started by zlssefi, Jan 12, 2018.

  1. zlssefi

    zlssefi Well-Known Member

    Joined:
    Nov 18, 2007
    Messages:
    194
    Location:
    Connecticut
    Im currently having an issue with a 1993 l150 wheel loader and the boom drifting. Aside from a lift cylinder by passing internally is there any other valve/ solenoid etc that could need rebuilding? Point me in the right direction please! Thanks guys!
     
  2. Ben Witter

    Ben Witter Well-Known Member

    Joined:
    Apr 3, 2013
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    186
    Location:
    On the outside
    The only things could be leaking by the spool lift pressure relief valve or lift cylinders. Most likely cause is lift cylinders
     
  3. rocknrabbit

    rocknrabbit Member

    Joined:
    Feb 12, 2015
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    Location:
    vic australia
    Is the boom drifting down (cylinder retracting)? If so your problem is outside the cylinder. A conventional, single rod cylinder can't retract even with faulty seals (or no seals at all), provided the inlet and outlet ports are blocked ie. good valving, and there is no air entrapped. Actually you could still have a seal problem, but in the above scenario you have to have an external fault as well
     
  4. funwithfuel

    funwithfuel Senior Member

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    Mar 7, 2017
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    348
    Occupation:
    Mechanic
    Location:
    Will county Illinois
    I was never good with years, what series? B,D,E?
    Is she equipped with BSS?
    Single lever joystick?
    Does it have return to dig?
     
  5. funwithfuel

    funwithfuel Senior Member

    Joined:
    Mar 7, 2017
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    348
    Occupation:
    Mechanic
    Location:
    Will county Illinois
    Ok. Googled the year, Volvo BM straight model. On the main control valve in the front section , you should see 3 adjustable cartridge valves adjacent to boom up, tilt in and tilt out. I dont think there is one for boom down. These are your shock valves. They all have the same part number.
    Block up your boom and bucket. This means use adequate support under boom arms positioned so they cannot be moved. NO, digging your cutting edge into the ground on a high angle is NOT ACCEPTABLE! Safety first. You can only make this mistake once.
    Once boom is supported, you can remove the cover off ftont frame. Now you will see the shock valves. Go back in the cab, start it, shut the key off and relax all the hydraulic energy. Preferably hold in boom float.bucket should be hanging free as well. The shock valves, Theyre rather large 1 1/4 -1 1/2 by 3 - 3 1/2" long. Mark each one. For testing purposes, you can swap boom up with say curl out. Raise your boom and see if she drifts. If the drift stops, put them back where they were and order a new one. They can be purchased over the counter, service dept will adjust setting for a fee. Specs are all a little different.
    Aside from shock valves and cylinders, things get a little hairy.
     
  6. zlssefi

    zlssefi Well-Known Member

    Joined:
    Nov 18, 2007
    Messages:
    194
    Location:
    Connecticut
    i will look into the shock valves. thank you for the input!! if it happens to be the cylinders by passing ill wait till they start leaking externally to have them rebuilt. We can live with it the way it is, its just kind of a pain is all.