[Milsurplus] ART-13 DY-17 U10?

[W2HX]

Hello all,

I am working on wiring up this DY-17 dynamotor for use with the ART-13.
https://w2hx.com/x/ART-13/u-10.jpg

Working to solder up U-10 for the DC input to the dyno, I have removed the back shell/strain relief to access the solder cups. The cups are pretty deep inside and so I also removed 3 screws around the perimeter that appear to allow one to remove the middle shell to give more room to access the solder cups.
https://w2hx.com/x/ART-13/u-10b.jpg (you can see one screw removed)

However, for the life of me, I can't get the middle shell to separate from the contact block of the connector. What am I doing wrong? When I look down inside, I see something that could possible be a snap ring, but there are no places to grip the ring to retract it, and even if I use a screw driver I can't get it to move or anything. Maybe it isn't a snap ring.

Here is the inside:
https://w2hx.com/x/ART-13/U-10a.jpg
https://w2hx.com/x/ART-13/u-10c.jpg

Is there a secret to separating this?
Thanks


73 Eugene W2HX
Subscribe to my Youtube Channel: https://www.youtube.com/c/w2hx-channel/videos


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