Jost fifth loosing itself

Jost jsk37USB. New jaws, cushion ring and double tension springs. Can adjust it til its correct and tight but when loaded, the weight pulling back against it causes the slack to appear where it slams forward and back on start/stop. Cant figure this out. Doesnt really happen when empty. When it does this you can see that the release handle protrudes more and more from the side of fifth wheel as its works slack into jaws. Can take cheater bar and knock handle back in and jaws tighten back up. Dont the double springs supposed to keep lock bar tight? Everything looks good so WTC?

 

Does your have the two piece handle? The top piece on mine is the catch lock and bottom piece is the actual pull handle.havent ever noticed a slot that it sets down in.

 

Also when i uncouple, the handle never falls back to recouple position so i have to pull it back by hand from the uncouple position so next time i couple it doesn’t slam into whatever its hitting.

 

Mine is like this. You have the one piece.

 

When it gets loose it doesnt come past the notch but it gets slack way before the notch catches. By that point its already way too loose