Ramp--Changing flat tire ??

[porthole]

Not only do the wheels need to be aligned relative to each other (toe), but caster and camber related to the axle.
Also, to do a complete alignment the trailer will be aligned with lasers, aligning the rear axles to the front of the trailer (kingpin).

 

[pegmikef]

Just got an axle saddle from my local custom trailer dealer. He had 3 different styles, so I took what appeared to be the heaviest duty for 6 bucks. Fits perfectly between the u-bolts. I took a copy of the picture (elsewhere in this thread) showing the saddle on the jack and he thought that was a great idea. I was surprised he hadn't seen that before because these folks deal in all kinds of cargo, utility, and livestock trailers.

 

[Manzan]

I have a NT 21 FBS and just had the tires balanced. I put my bottle jack under the shackle between the tires to jack up one side at a time. It is a wide track model. Did not really like the bottle jack top against the shackle. I don't think it could slip but I don't know what would happen along side a highway with trucks passing. Asked my son in law, who is a welder, to make a saddle with a ring on the bottom to put under the shackle and jack her up. This should be a lot more stable, not that I want to try it out.