To replace the older welded-on axles, (which was done until around mid 2004,) they just grind off the old weld beads to separate the axle from the frame, and if you're "forward thinking," you don't want the new axle welded back on after the old one was removed. Get the newer axle "bolt-on kit" so that you can readily change the axle out in the future without the need for anything except a few wrenches. All the axles installed for many years now do not weld the axles on anymore. I would also suggest that you add a couple of pieces of 1 1/2" square channel tubing under the frame where the axle mounts to the frame to recreate the "high lift axle" configuration currently used. That would allow you to run on 15" wheels. Much better ride, higher load capacity and more, (and better,) tire options than you can find available with the older standard 14" trailer wheels. Your ideal replacement would be a Dexter #10 Torflex axle. If you upgrade the frame with the added square channel "lift kit" you should go with the one that has the 10 degree down angle.
The Dexter Torflex axle specs for all the "bolt-on" axles that Casita now uses:
65.5" hub face
51 " outside to outside bracket spacing
5" on 4.5" Lug Nut bolt pattern
AP166 Mounting Brackets
And the "start angle," (in degrees of angle,) of your choice: 10 up, 22.5 up, or 10 down, or 45 down.
What Casita calls "low rise," (aka, the old axles with no lift kit,) is the 10 degree up angle. And the currently installed high rise, (if you raise the frame height by adding the 1 1/2" frame lift kit I mentioned above,) is the one with a 10 degree down angle.
Edited by Euphoria, 07 January 2021 - 06:43 AM.