in wanting doors to close correctlyand latch

[wagonwheel]

What could I do to mechanisms to service& adjust
or is the reason they are not working is that they are shot?

 

[jeff campbell]

Check out the hinge's 1st. Get them in tip top shape,that's the main thing.Jeff

 

[Mark Pietz]

It seems the progression is first worn hinge pins, causing the door to sag. This, in turn, causes the little latch "fork" thing that locks when closed, to often strike (and wear) the top of the door jam lug. Also, I've observed that the actual shaft and hole for the latch "fork" thingie wears, compounding the problem. So it isn't just one thing wearing out, it's a combination of hinge pins and latch mechanism (left ones wear out, likely the right one is still like new). The left door on my '80has this same problem. I fixed the pins, but now am dealing with a worn latch.

 

[ronmc1954]

The other thing to check is your body mounts. Especially right below your door post(s) they will cause the doors to sag creating a propblem.
Ron