M70 Clutch Assembly
- Thread starter Mikey
- Start date
Transistorized
Member (SA)
This is a common problem with this style clutch. The plastic shrinks and splits under its own tension. I've been fortunate enough to not have this happen yet, but this will eventually be in all M70's future.
JVC RC-M70 / M71 / M75 FF clutch plate/cap. Rewind & Fast Forward issue repair | eBay
Find many great new & used options and get the best deals for JVC RC-M70 / M71 / M75 FF clutch plate/cap. Rewind & Fast Forward issue repair at the best online prices at eBay! Free shipping for many products!
www.ebay.ca
Figured as much. Thanks for the link. Is this you? Someone you know? Random search?This is a common problem with this style clutch. The plastic shrinks and splits under its own tension. I've been fortunate enough to not have this happen yet, but this will eventually be in all M70's future.
JVC RC-M70 / M71 / M75 FF clutch plate/cap. Rewind & Fast Forward issue repair | eBay
Find many great new & used options and get the best deals for JVC RC-M70 / M71 / M75 FF clutch plate/cap. Rewind & Fast Forward issue repair at the best online prices at eBay! Free shipping for many products!www.ebay.ca
Transistorized
Member (SA)
This is just a search I performed. There are members here that are well versed in 3D design such as Caution, but I am not that talented
Tinman
Member (SA)
Tinman
Member (SA)
It was years ago so I don't think anybody had replacement ones available so I glued them on.
I can't say how long they lasted but it worked for as long as I had them.
BoomboxLover48
Boomus Fidelis
Assorted gears work well!
Basically, all you need is a plastic washer with the same hole size to push in and lock the whole clutch assembly in place.
It is easy to find a small gear with the same hole dimension.
Basically, all you need is a plastic washer with the same hole size to push in and lock the whole clutch assembly in place.
It is easy to find a small gear with the same hole dimension.
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BoomboxLover48
Boomus Fidelis
I bought assorted gears from Ebay and found one that can be used to lock the clutch assembly. That worked so well.
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For the cost of that 3D printed one, why even bother to give this another thought. It's really not worth the effort to measure and fuss with rigging something up.
Transistorized
Member (SA)
You have to practically blow this thing entirely apart to get to the clutch. It would suck to have to go back in because it failed again.
Which does bring up a complaint that I have with the M70, aside from the known issue with the sliders. Fortunately those are easy to get to and remove for repair but I digress.
This radio is the only box I own that I absolutely make sure the tape speed and transport is right with a day or two of playback before I put it back together. The reason is, I don't want to have to remove the chassis again for adjustment or repair. It isn't too hard, it's just more than I feel you should have to do. Especially when it comes to adjusting the tape speed. Unless it's the model with pitch control, it's almost worth drilling a tiny hole next to the counter wheel on the front and putting a M70 decal over it.
I'm sure the idea was that you shouldn't have to touch the speed after it's adjusted correctly. In those days, that made sense. However, the crappy or NOS belts that are past their prime today, tend to stretch after a few hours of playback which would make a convenient speed adjustment welcome.
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All I want to do is replace the part and move on. Need to stick something in there before I close it up.
BoomboxLover48
Boomus Fidelis
I've mentioned about the assorted gears before. You can find several small gears from it with the same hole size so you can friction fit one there.
This is a bad design where JVC put a friction fit plastic washer to hold the clutch assembly in place where a E clip lock along with a washer was needed.
Plastic type used for this need hardened and cracked. Polypropylene could have worked better but the type of plastic used can contain other polyolefins or plasticizers.
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Stupid question. What is the purpose of this part? It doesn’t drive anything since it’s not a gear per se.
BoomboxLover48
Boomus Fidelis
It is just a piece of plastic to lock the clutch assembly in place. The broken piece in your pic will fall off along with the clutch assembly because it is spring loaded.
Cassette deck part and how do I fix it?
got my belts today so i decided to put them in. while i was in there, i noticed a plastic part had a crack. the cassette plays, pause and stops fine but the FF and RW don't work. i noticed these parts fell out: what do i do now?
www.boomboxery.com
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