[77newell]

Feeling comfortable under 20 tons of hard metal takes work, especially knowing how to support the coach so that a failure of the air suspension does not allow it to come down. I use 20 ton hydraulic jacks either on pavement or on laminated blocks on softer surfaces. I jack up until I am confident that deflating the air bags will not just push the jack into the ground. Still, there are times when I wonder what the heck I'm doing under there.

The other approach that I saw at Parliament coach is to construct heavy duty ramps with a dual layer of 3/4' plywood on the top surface and 2X6 runners with lots of cross bracing. They are so heavy that they are mostly moved with a fork truck, but I saw both Prevosts and BleuBirds on them and people working underneath.