dirtygoat
1/2 ton status
Carry a short chain and if you HAVE to use it to change tire chain the axle to the frame so you don't have to unload suspension before tire lifts.
X2... Works great...
The biggest thing I can't stress enough on is about the intended use of a Hi-lift jack. Hi-lift jacks ARE NOT meant to be used for changing tires and the like, they are designed to be used to get a stuck vehicle unstuck by jacking the vehicle up and then pushing it off the jack allowing the vehicle to move forward. The base is attached the the beam of the jack with a single cotter pin.
Using a hi-lift to change a tire is like using and old bumper jack to change a tire... It'll never work...

Hi-lift even says that you should never push or pull a vehicle off the jack...
There is nothing in the owners manual that says you cannot or should not use it as a "jack" to change a tire...
To the original poster...
The posted information is other peoples opinions... You need to read the owners manual for yourself...
Like any other tool if you use it for it's intended purpose and take precautions to act in a safe manner, you will still have a chance for failure or injury...