You have a weight restriction of no lifting over 50lbs and a moderate lifting occationaly of 10-50lbs it takes a force of 80lb too release a fifth wheel lever and tandam pin is this oover restrictions?

Answer 1

Yes. If it takes a force of 80 lb to to move the lever, that would be the same as lifting 80 lb. Unless you can apply the force by, for example, standing on the lever and letting your weight provide the force instead of using your muscles.