Hello, long time no see.

Anyways, I've recently been using the old WM-F10II again, only to be greeted by a grinding noise against the back shell of the unit.

Thinking I had crushed the unit or something, I took it apart, and found that the capstan flywheel was only "held in place" by its belt.

The "plastic washer / retainer" on the capstan shaft had fallen off sometime whilst in transit .

I have searched my pockets and not found any trace of it. There also was no sound of a loose object floating around the inside of the machine.

So now, I have two options:

- Acquire a spare part (it has been referred to in repair manual to be replaced and not reused when removed for servicing working parts under fly wheel.)

- Recreate one using thin sheet of plastic and epoxy resin (still thinking about this one.)

Does anyone (Doc P in particular) have any clue on how to obtain this part?

Thank you.

I loved that bit 'Doc P in particular' absolutely no way of escaping that one

I'll see if I can pluck off one from one of my donor units for you shall PM you in 12 hours

Happy Mending

P

Hi DocP, great to hear from you! 

Thank you for your quick reply, however I have a bad feeling that it is quite hard to remove an existing retainer / bushing from a unit. I do not want to pressure you into destroying a perfectly usable one for yourself.

I gathered this from:

<From Sony Troubleshooting Guide WM-10 / WM-20

5) Do not reuse capstan bush after having removed it.

I am however perfectly open to reusing whatever can be, given that it is possible.

If it is possible, then I have no problem paying for postage / etc. This understandably seems to be a discontinued part . But it doesn't seem to be a part that often causes trouble... why did it happen to me?

Otherwise, I plan to drill a small hole on a thin sheet of flexible plastic (not sure what kind yet, one that doesn't crack easily), slot it over the capstan shaft, and pot the entire top of it with epoxy, then file away the excess...

kkzeder.

Just thinking along lines of likely replacements other than the original or the DIY epoxy approach:

Mini 'push nuts'

or

Mini E clips (like ebay item 390312614431)

or Self retaining nylon washers:

http://www.mcmaster.com/

http://www.mcmaster.com/#self-...ning-washers/=goajc0

I like this...a lot

Hello, and thank you for your suggestions.

I currently have a dead TCM-7 (stuck servos) undergoing repair as well and as it so happens, has several shafts of the same diameter, so for now has donated one of them retaining rings from the servo mechanism . I won't be putting it back together till I get some grease and belts anyway.

This is only a temporary solution for now, I notice:

- The ring has quite some friction, and slips on the shaft, as when the capstan + tape + pinch roller run together, the flywheel has a tendancy to work outwards (so the capstan pinches more against the ring).

- There is slightly more play on the capstan shaft (if you call a fraction of an mm more) compared to the original setup, but it does not make contact with the rear case.

I still think that cutting a piece of plastic and potting it with epoxy is a better long term solution, as the capstan rides rough on the ring, and seing that the one from the TCM-7 is simply a split metal ring, have to be careful...

And with some Sharpie, should look quite like the original (I hope). Epoxy really hardens well.