Scissor jacks unscrewing

Discussion in 'General Camper Setup / Take Down' started by JimmyM, Jun 26, 2017.

  1. JimmyM

    JimmyM Well-Known Member

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    I was setting up last weekend and the front scissor jacks won't stay in place. The front is lower than the back, so the jacks aren't deployed terribly far. Maybe 12-14 inches. I crack them down to stabilize, and as soon as I take off my drill, the screw spins backwards and the camper comes down. Mind you, I'm not trying to lift the whole corner, just bring the stabilizer down and put some weight on it.
    I didn't think these screw jacks were supposed to be able to do that.
    Any similar experiences?
     
  2. kitphantom

    kitphantom Well-Known Member

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    The stabilizer should be snug, but not lifting at all. The description of spinning backwards and camper coming down sounds like you are actually lifting the camper a bit.
    We have never had ours "unscrew". We have had to re-tighten them under some soft surface conditions on a few occasions.
     
  3. Antipodes

    Antipodes Call me Paul

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    No they should not unscrew like that! Not sure if you have lubed the threads at all but they may do this if very well lubed.
    I only use a Teflon spray and leave to dry, don't want to attract dust and grit which in most cases caused more friction.
    The scissor jack is used quite often for wheel changing on cars, so it does not do this when it has a load on it or we would all be injured from changing tyres.
    Don't have a solution for you, but someone else may!
     
  4. JimmyM

    JimmyM Well-Known Member

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    The screw turns a couple of times very quickly. The camper only drops an inch or 2 maybe. To put weight on them the weight has to come from somewhere. That's the weight on the wheels/suspension. So ANY force on the stabilizers will lift the camper to some degree.

    But the whole idea behind a screw jack is that it can't unscrew itself. I did lubricate them but jeez! Also it looks like the "nut" end has a thrust bearing there too.

    I'll have to "un-lube" them?
     
  5. sierrapup

    sierrapup Active Member

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    rub some dirt on it, it'll be ok...lol..[CC]
     
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  6. Antipodes

    Antipodes Call me Paul

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    Hahahaha, yeah that will screw them, so to speak.:D
     
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  7. Haybale

    Haybale I'd rather be camping!!

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    I would unlube them....

    I have used scissor jacks as stabilizers for years without issues. I just spray them lightly with a dry silicone spray.
     
  8. smit1088

    smit1088 Well-Known Member

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    Do they unscrew when you use a standard handle on them instead of the drill?
     
  9. VTRailroadguy

    VTRailroadguy Active Member

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    Clean off the grease and try it again. Friction keeps them in place, so I bet you just got things too slick.
     
  10. kitphantom

    kitphantom Well-Known Member

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    Re-reading, I realize we have the non-scissor style. However, any style jacks should hold with weight on them, scissor jacks use for vehicle tires definitely need to not lower. I know some have said they've gone to a junkyard and bought those to use for the pups.
     
  11. Haybale

    Haybale I'd rather be camping!!

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    That's what I use!!
     
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  12. RollTideRick

    RollTideRick Member

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    Getting ready to install 4 GM Jack's on the Forrest River. The fold down stabilizers are too much work.
     
  13. f5moab

    f5moab Retired from the Federal Government

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    Deleted
     
  14. nineoaks2004

    nineoaks2004 Every meal is a picnic and every Day is a holiday

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    I bought two jacks from HF for about 35.00 each and installed them in the front of my TT, the rear came with jacks. I have never had screw jacks "unscrew" actually they are not made to level the unit, the front is leveled using the front tongue jack, then the stabilizers go dow to sturdy the unit.
     
  15. JimmyM

    JimmyM Well-Known Member

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    Yup. I level side to side with linx blocks and front to back with the tongue jack. But when I screw down the jacks to put some weight on them, they unscrew a couple of turns after I take the drill/handle off.
    The camper only "lifts" an inch or so to put weight on them.
    I'll be "un-lubing" them when I de-winterize. Just a spritz of dry lube.
     
  16. tombiasi

    tombiasi Well-Known Member

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    Are you sure they are unscrewing and not just taking back play in the lift assembly? By design I can't envision how they can unscrew.
     
  17. JimmyM

    JimmyM Well-Known Member

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    Oh, no. They're definitely unscrewing. I don't get it either. Screw jacks aren't supposed to be able to do that. But here we are.
     
  18. JimmyM

    JimmyM Well-Known Member

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    Oh, no. They're definitely unscrewing. I don't get it either. Screw jacks aren't supposed to be able to do that. But here we are.
    Getting the existing grease off is gonna be a pain in the a**. I used lithium grease stick.
     
  19. tombiasi

    tombiasi Well-Known Member

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    I really don't think grease is your problem. Jacks can't unscrew. The force on the screw cannot move the screw.
     
  20. JimmyM

    JimmyM Well-Known Member

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    Dude. I know what I'm seeing. I didn't think it was possible either. a single pitch screw shouldn't be able to back out.
     

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