where to jack shell?

[walleye001]

I had to replace back floor in my 72 landyacht. I cut the 3/4 in. plywood and I plan on raising the rear end and sliding the plywood between the frame and channel. I raised 1/2 inch (pictures] and I am rethinking jack location. Is there an easier way?

[sdavis2616]

I replaced the rear section of plywood in mine a couple of years ago. I removed the jacks from under the frame. My wife stood on one of the steel cross members inside of the trailer. This caused the frame to sag while the shell went up. My father and I just slipped the new 4ft section of plywood between the shell and frame and slid the new plywood up to the cross member my wife was standing on. After that she stood on the frame outside of the trailer until we worked the joints together.

[TheGreatleys]

What happens when you remove the two jacks under the rear frame? Maybe even drop the tongue and add some weight to the rear bumper. The frame is pretty flexible, I had to jack mine up quite a bit to meet the shell when I did our shell-off.



Even with only one section removed, I wouldn't be surprised if it gave you enough play to slide a piece of plywood in there. I would hesitate to apply any pressure to the top of the compartment door, since warping the door frame could prevent the gasket from getting a good seal ever again.

[Atomic_13]

I agree with the downward pressure on the bumper idea. Also, if you can get at it from the ground or remaining good floor on the trailer consider applying upward pressure to the inside ceiling. Visualize this inside the trailer: a scrap piece of plywood on the floor -> floor jack on the plywood -> 4x4 on the jack extending upward to the ceiling-> 2x6 across some ribs. Be careful not to crack or damage your inner skin.

[walleye001]

it worked! taking pressure off of the rear Jack's and adding weight to rear end dropped the frame 1 in. allowing the plywood to slide in. no wife so I used buckets of water.