If the air bag is in tact and the air system is operative, you can raise the
lift point high enough to get a standard 3 ton bottle jack under the bogie
center attachment to the frame. Be sure to disconnect the auto-level
connector arm (top of the wheel well) from the bogie connection point BEFORE
jacking and placing a piece of flat stock (steel or aluminum) under the
bogie arms will insure that the wheels come off the ground as you raise the
coach.
If, however, the unit is "squatting" with the bag empty and/or the tires
flat, I doubt that ANY bottle jack would fit under the center bogie lift
point and, if on dirt, you'll probably have to excavate a pit for the jack
and some dunnage lumber to foot the jack before trying to raise her. The
alternative is to HOPE the original GMC jack and chain are still with the
rig and use them.
Good luck and for God's sake be careful: The back of this thing is VERY
HEAVY and can hurt you like you've never been hurt before if it gets away
from you.
Dick 75 PB in Atlanta
>If you are asking about the height between the wheels, mine measures 7 3/8
>inches
>