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What’s a matter with this Shimano m700 deer head rear derailleur?

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What’s a matter with this Shimano m700 deer head rear derailleur?

Old 12-22-20, 06:16 PM
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LBCwanabe 
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What’s a matter with this Shimano m700 deer head rear derailleur?

It has chicken-winged. And springs open. What do u suppose the problem is?

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Old 12-22-20, 06:28 PM
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It's missing the stud that prevents the cage from unwinding after the chain is removed.
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Old 12-22-20, 06:37 PM
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Originally Posted by T-Mar View Post
It's missing the stud that prevents the cage from unwinding after the chain is removed.
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Old 12-22-20, 06:45 PM
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Replaceable?
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Old 12-22-20, 07:51 PM
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I had one in use without that stop pin. All worked fine until I had to remove the wheel to fix a flat, which of course happened three times on one ride (rim tape problem). The pin is a threaded stud, and I’d imagine you could sub in a bolt with the correct threading.
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Old 12-23-20, 04:16 PM
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T-Mar
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I'd just visit my LBS or CO-OP and ask if I could rummage through their garbage for broken Shimano derailleurs. Shimano used stamped offsets, press fit pins and threaded studs as cage stops. Based on the handful of Shimano derailleurs that I pulled from my bins, the threaded studs all use the same thread standard and there only appears to be a couple of different heights, so it shouldn't be too hard to find a replacement. I'd send you one but with the COVID-19 induced international shipping problems, who knows when or if it would arrive.
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Old 12-24-20, 09:44 AM
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If you want the easy method and just replace it, how about going to the above group ISO and seeing who may have a few of these you may trade for. The M700 is not rare.
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Old 12-25-20, 05:25 AM
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LBCwanabe , there's a deer head M700 RD for sale here. Might buy one to ride with and keep the other for parts.

I was tempted but already have a couple of Shimano long cage RDs from the early 1990s, an Exage 500CX and Deore LX, which are nearly identical with minor cosmetic differences.
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Old 12-25-20, 04:20 PM
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Had one like this recently as well, without the clutch though.
I'd imagine they are the same and the stop is cast in to the body, and broken at this point.
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Old 12-27-20, 08:43 PM
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Ah the infamous "Super Plate" version of the Deore RD... I've had em, and honestly I've never liked them... gave me chronic agita...🤪
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