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2-ton trolley type Hydraulic Jack won't raise.. Any ideas?

Discussion in 'Off Topic [BG]' started by XavierG, Mar 9, 2003.

  1. It's a small home-garage model (horizontal trolley type) with an air release screw at the end, a rubber cap on the filler hole, and another screw marked "Do Not Adjust" (also on the cylinder). Well, problem is, when I try to jack it up, the jack moves up with every up stroke of the lever and down with every down stroke. What gives? I checked the fluid level and it's fine. The air screw seems to seal just fine when screwed in. The 2 page manual that came with it is useless. Any ideas?

    (Anybody have a clue what I'm talking about?)
  2. sigterm

    sigterm Supporting Member

    Feb 5, 2003
    Atlanta G of A
    /beavis voice on
    heh hehehehe
    /beavis voice off

    sorry the first thing i thought of when reading that was a kliche beavis and butthead moment.
  3. Benbass


    Jan 28, 2002
    Do you have to turn the handle to get it to hold pressure?
  4. No. The handle is used to crank it up. Also, once up, when you want to bring it down again, you remove the handle which doubles as a wrench to unscrew the pressure release screw which brings the jack down.

    It's one of these puppies....

  5. Sounds like the one-way valve off of the pump piston is defective. This means it sucks the fluid back out of the jack cylinder and back into the resevoir. These jacks aren't very expensive and I would bet that having it looked at by a hydraulic service guy would cost more than it's worth. Replacing the hydralic jack itself even poses a problem since this type is made to work in a horizontal position rather than straight up. If it's new send it back.

    From my view, it looks like a new jack is in the offing. :(
  6. read manual?
  7. Well, yes, but as I mentioned above, the 2 page manual that came with it is useless.

    So, looks like I'll have to get a new one (jack, that is).
  8. Brad Johnson

    Brad Johnson Supporting Member

    Mar 8, 2000
    Gaithersburg, Md
    What Hambone said. Plus I just don't screw around when it comes to jacks. Unless you find you were doing something wrong, I wouldn't feel comfortable under or around a car with this particular one.

    A new one is fairly cheap.
  9. HeavyDuty

    HeavyDuty Supporting Curmudgeon Staff Member Gold Supporting Member

    Jun 26, 2000
    Suburban Chicago, IL

    Sorry, that was useless... carry on.
  10. I originally tried that... couldn't lift our mini-van - that's why I bought the jack.
  11. HeavyDuty

    HeavyDuty Supporting Curmudgeon Staff Member Gold Supporting Member

    Jun 26, 2000
    Suburban Chicago, IL
    X, that's a visual I *really* wish I had never experienced.

    I meant in the jack's hydraulic fluid.
  12. jasonbraatz


    Oct 18, 2000
    Oakland, CA
    my cheapy walmart jack started doing the same thing. it's toast, and i believe yours is too.
  13. Sorry Xavier, but I think it's time for a vote of no cofidence for your trolley jack! I've fortunately never experienced what you have. To me (untrained laymen type person) sounds like the valve is goofed! This would give me zero confidence that the jack will hold when you're under it! Time for a new one!:)
  14. moley


    Sep 5, 2002
    Hampshire, UK
    LOL, you asked for that one :D
  15. BlackNeckJspl


    Dec 14, 2002
    Go to Sears get a real floor jack. :bassist:
  16. Along with not having confidence in jacks, you should ALWAYS put jack-stands under your vehicle before working on it from underneath. There is simply no safe way to work under a car being held up only with a jack.
  17. Brad Johnson

    Brad Johnson Supporting Member

    Mar 8, 2000
    Gaithersburg, Md
    Excellent advice.

    I learned the hard way. My car (66 Malibu convertible :D) slipped off the factory jack while my brother was trying to shake a tire free, way back when. The car fell and his hand was pinned on top of the tire by the fender. I immediately grabbed the bumper and raised the car enough for him to free himself. No permanent damage and a life lesson learned too.

    To this day my brother still tells people that I freaked and started screaming and running around, so he raised the car up himself... with his free hand;)

    Gotta love kid brothers
  18. Mike N

    Mike N Missing the old TB Supporting Member

    Jan 28, 2001
    Spencerport, New York
    I learned the hard way at age 16 when a friends 74 Chevelle slipped off the bumper jack and crashed down on my head. Being young and stupid, I never said anything to my parents, or went to a doctor, but I suffered dizzy spells for years afterwards.