I've used the scissor jack twice on my jl sport s to change flats. No issues. I have a jack base for it, so I'm also not fully extending it to lift the tire (33s)a couple inches off the ground.
Same here. My wife called me a few years back saying she got a flat on her way to work. She was driving her '03 Jeep Liberty, and made it to the parking lot, which was nice and level. The KJ has the same scissor jack. I got it lifted up, got the tire off, then the jack slipped and the Jeep went down. Fortunately, it missed me and landed on the shock mount. Scared the bejeezus out of us!Not a jeep but I did have one collapse on an Escalade. Was in process of swapping a flat in the garage. Not sure why I used the scissor jack in all honesty being that a floor jack was equally accessable at the time. While the wheel was off and I was reaching for the spare down went Frasier. Faster than anyone would have the chance to move out the way. I was fortunate in that the spindle actually contacted the concrete and kept the rotor from ever touching ground. Eventually reached for the floor jack to get it back up and wheel installed. Never touched a scissor jack again. That was nearly 20 years ago.
Just to level set, you aren't lifting the entire vehicle. Look at the floor jacks we use for service. Most are 2 to 2 1/2 ton, and yet I lifted the entire front end of my 6000lb truck.One odd thing to note, is the listing for the HMMWV jack indicates a 3500-lb capacity, which is less than every JL model. Even a 2-door Sport is 3797 lbs. HMMWVs can weigh well beyond 5000 lbs, depending on how they are configured, so just curious if that jack is the real deal.
I've seen quite a few collapse due to improper mfg. metal failures, rivet failures. I do agree on slipping off of bottle jacks.For the scissor jack haters, I'll just say that if you have the brains god gave a frog, you don't want to be under any vehicle supported by any jack. I've seen vehicles fall with a number of different jacks, scissor jacks included. All were a result of user error. Bottle jacks are very reliable, but a vehicle can slip off as easily as any other. Whatever you use, stay out from underneath the vehicle and don't be surprised if the vehicle falls because of many reasons (mainly, like didn't set the parking brake and chock the tires).
I'd never call you chicken. That's always been my oldest daughters nickname....and I'm even more chicken. I put tire/wheel under the vehicle frame or other convenient things
So.....based on the discussion in this thread, I purchased an unissued HMMWV jack and AO adaptor. Unfortunately, there is no room on the driver's end of the front axle for the adaptor to fit, so there's no way to use the jack for the front driver's side wheel. There is enough room along both axles for the other three wheels, but no sense in keeping this jack/adaptor kit if it doesn't work for all four.Get this jack
NOS Military Hummer H1 3500LB Humvee Scissor Jack KIT Adaptable for Off-road | eBay
Get this adapter, or if you're handy, make one from a leaf spring pad.
AO Axle & Frame Adaptor for H1 Scissor Jack - Agile Off Road
How's the fit in the standard storage compartment with the large base? I haven't opened mine up to investigate.To complete my HMMWV jack saga above (if you really are still interested), I ordered a jack pad from Safe Jack, which worked out much better than the AO adaptor because it is only 1.5 inches wide and fits perfectly at both jacking points on the front axle; rear axle has plenty of room. Only modification I made on the Safe Jack pad, was to cut down both ends by 1/2", to avoid contact with the other suspension components along each axle. The setup works great, but the diameter of the jack pad's receiver is approximately .10-inch wider than the jack's ram, so it is much looser that the AO adaptor. To mitigate this, I will try to find a metal sleeve that is big enough to fit over the ram, and small enough to fit inside the jack pad's receiver. If that's not possible, a couple wraps of duct tape around the ram will fill the void and keep the jack pad snug but still moveable.
Luckily, after all my time driving HMMWVs in the military I never had to use one of these jacks, but they are great for Jeep use, thanks to their robust construction and wide 12"x7" base plate. Bottle jacks are great, but a quality scissor jack will never leak and is pretty much indestructible if used properly. Pretty clear why these were standard issue in the first place.
Hope this helps others who are interested in this jack setup and glad to answer any questions. Happy (and safe) Jeepin'!
I rediscovered these guys recently - probably have just what you need.... try to find a metal sleeve that is big enough to fit over the ram, and small enough to fit inside the jack pad's receiver.