Changed Mine and the Clock works Great
Benzmac is right, remove the clock and replace the capacitors before spending any serious money on an overhaul. I think the parts cost me $4.00 and it took about two hours in all from tear out to rebuild to replacement. The dust bunnies were also surrounding the center shaft of the clock so I blew that off and relubed with 3 in 1 oil. Clock has been keeping great time ever since. Do a search on this site for clock and read the posts on how several of us did it, and what to look for when you do it.
"Tell me and I will listen, Teach me and I will learn, Show me and I will accomplish, Involve me and I will succeed."
'84 300SD 256,000 Gold on Brown (Mileage Award)
'86 300E 246,000 Blue on Tan