Huntindog wrote:
There are several issues..
But the main one is this: On a properly tensioned WD, it is impossible for the hitch to come off of the ball. Even if it is unlatched.
Try it and see. Hitch up normally. Then release the latch. then try to raise the tongue off the ball with the PJ. It cannot be done.
Bob states just the opposite.
This can only work if the bars are wayyyy too loose. Which means they are not doing anything, so it is not working.
Forgetting for the moment the extra 3 inches above, start with the hitch just touching the ball but not bearing down any weight. Then if you connect the chains and lower the hitch, the chains will get tighter and you won't be able lift it off the ball
provided your truck sags some when hitched. That's based upon the fact that the ends of the bars drop more than the brackets on the trailer do when you lower the hitch/ball. This creates tension in the chains and weight on the hitch, not unlike the increase in tension when you drive through a gully and the front of your truck pitches up.
The only consideration is whether that's enough tension or not. I don't know if it is.
Think of it this way:
If you connect the hitch to the ball and then crank up the truck and trailer together before installing the chains, it depends upon whether the ball ends up at or above the original unladen height when you connect the chains. When using the jack with them coupled, the first bunch of lifting is simply unloading the trucks's suspension again. If all you do is unload the suspension, that's no different than connecting the chains before you load it.
On the other hand, if you indeed have to jack the ball
above where it was before you started in order to install the chains then Bob's method will not provide enough tension.