Problem with Motorcycle lift / ATV Lift Large Scissors 680kg

Discussion in 'The Garage' started by philgunn, Mar 5, 2012.

  1. philgunn

    philgunn BMW R80gs offroad + HP2

    Joined:
    May 25, 2004
    Oddometer:
    244
    Location:
    Cork Ireland
    Hi all

    I am having ongoing problems with a large motorcycle lift / ATV Lift / Lawnmower Lift

    it comes with a handpump - Airmotor attached ,

    at the moment the pump seems to be letting go , ie when you hand pump it , the lift falls straight away as if the release lever / down lever is stuck on ,

    and the airmotor when the pump is working takes about 3 minutes to lift the lift ,

    at the moment i am operation it with a 10 Ton portapower pump , but would like to upggrade the airmotor pump to something better , has any one had this problem

    pictures here http://flic.kr/ps/wjHnh

    Phil

    lift is 1200 mm wide
    2000 mm long + Lead up ramp
    Max lift is 680kg
    #1
  2. scapegoat

    scapegoat Pushin forward back

    Joined:
    Dec 21, 2005
    Oddometer:
    2,988
    Location:
    Out west.....somewhere
    Man, looks dangerous to both you and any bike on the lift. The pump looks identical to a hydraulic hand pump in a Harbor Freight jack setup my work once had. If the system has a gauge on it Id have a look and consider setting up a air compressor and valve system with a foot pedal if possible to raise and lower the lift. The ram is far smaller the the one on something like my Handy Lift but Id think you could rig something up.
    If thats not an option Im guessing your pump has a over pressure release and the spring and or valve are weak or damaged. Once it begins to release air it basically lets go and it drops like a rock. Im guessin this only happens with a bike or large amount of weight on the lift??
    #2
  3. Bump Stop

    Bump Stop 2 Wheeled Drifter

    Joined:
    Aug 17, 2009
    Oddometer:
    7,832
    Location:
    finding Jesus

    this sounds like a possible check valve problem.
    #3
  4. gsweave

    gsweave Yinz, blinkers are on, JACKWAD!

    Joined:
    Apr 2, 2005
    Oddometer:
    15,881
    Location:
    The Paris of Appalachia
    Phil,

    yea
    sounds like a check valve,

    You might want to crack her open clean and inspect.

    portapower? nice back up jack


    Damn nice shop bub!!!
    #4
  5. wos

    wos Long timer

    Joined:
    Aug 14, 2008
    Oddometer:
    1,776
    Location:
    beside the cool pool
    I have a floor jack that did that to its last owner. It was lent to the idiot next door who used it for a weekend. When it was returned it would pump up slowly and slowly drop. The owner was moving and didn't. Have time to deal with it. In the process of taking it apart I found the lowering valve to be entirely the wrong way, spun put out instead of in. Has worked fine since.
    #5
  6. katbeanz

    katbeanz earthbound misfit, I

    Joined:
    Feb 12, 2005
    Oddometer:
    8,150
    Location:
    Kansas City
    #6