Red 1982 Sony WM-DD walkman rebuilt and center gear driving Lever assy fixed
retrodos - 2012-01-11 00:10
Bought this off eBay, seller said won't play and had cracked door, but turnout to be in worst condition then that, as someone been inside it and somehow he figure throwing oil into the transport would fix the issue with the crack gear? Ended up rebuilting the walkman and is in full working condition, no more cracked gear
Here another way to fix the center gear problem, you have to add teeths to the gear, etheir way works good, fix a few this way and haven't have problem, used a DC2 for over a year with this fix and no issues, but is time consuming to do the fix and you have to get the spacing dead on. Picture below of the other way to fix it.
viknl - 2012-01-11 02:11
Nice work, looks pretty clean. I just used the same method (adding a couple of teeth in the gap) for the first time. What type of glue did you use? Mine is by Toolcraft, it's a 2k epoxy, drying in 60 minutes to allow enough time for adjusting.
I just don't feel really confident that it's strong enough since I have no idea what kind of plastic the wheel actually is... I am considering now to reinforce the added 2 teeth by glueing a very thin strip over it, maybe even sandwiching it between 2 strips.
I'm just not sure how much (little) it can protrude without causing trouble...
retrodos - 2012-01-11 06:07
Nice work, looks pretty clean. I just used the same method (adding a couple of teeth in the gap) for the first time. What type of glue did you use? Mine is by Toolcraft, it's a 2k epoxy, drying in 60 minutes to allow enough time for adjusting.
I just don't feel really confident that it's strong enough since I have no idea what kind of plastic the wheel actually is... I am considering now to reinforce the added 2 teeth by glueing a very thin strip over it, maybe even sandwiching it between 2 strips.
I'm just not sure how much (little) it can protrude without causing trouble...
Crazy glue or CA-glue the teeth into place, then a thin layer of 1200-2000 psi epoxy, will work, you have to sand the bottom of the gear, to thin the glue out, so the glue doesn't rub on the lever, Make sure you mix the epoxy well, till it clear, so it will be stonger.
viknl - 2012-01-11 08:41
Have you ever tried cutting the center gear in 3 parts and just leaving 3 gaps? I want to try that next time, seems a decent solution since a 1-tooth gap runs pretty smoothly....
walkman.archive - 2012-01-14 10:25
retrodos, congrats for your video. It's so nice to see how you fix it.
It was so useful for us if you add in your video small steps about how do you do to fully open and disasemble it, so we can learn how to do it, and how do we manage those little jumping springs that tend to disappear at the very beggining 
I'm happy that you finally achieved to bring that nice Red DD to life, something that I didn't even try myself.
BTW: I'm sure it was the previous seller who fill it with oil inside, for sure. I didn't even think of doing this, for sure! ;-)
Thanks for all that good info!
ke4mcl - 2012-01-14 19:44
nice vid. one comment though. oil does NOT corrode metal. if it did would jewelers be commissioned to oil antique watches?