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Stuck APC-7 connector

 

Hi guys,
I'm having trouble removing this connector. I've slackened off collar 'B' anti-clockwise in the picture and it's free. Collar 'A' on the other hand, is immovable. It should slacken off and retreat back towards the 'port 1' sign when turned clockwise, but it's not. This whole assembly should really only be finger-tight, but even with an adjustable wrench on the flats of 'A' I cannot rotate it. I'm using as much force as I dare and fear damaging it if I go any harder, so something must be amiss here. I'm not sure if the flats of the brass part 'C' could be of any assistance here or not, but I'm pretty sure I've never had to do anything with this section to get the assembly off before.
Any suggestions?
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Thanks, Jinx.
?
 

Put a few layers of masking tape around the knurled nut closest the panel and apply clockwise torque gently with channel-lock pliers. If it doesn't come loose easily, put a wrench on the flats of the hex section at the N-connector end and torque it slightly CCW while turning the ring CW.
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Ed
 

Can you determine which end has the threads out - the N adapter or the port?
Then using a padded jaw pliers and the hex wrench, turn the nut that doesn’t have the threads exposed. I would guess the port has the exposed threads and the N adapter is threaded on. In this case turn the hex nut CCW.
If this is not the case then turn the port collar collar to release the connection.
Someone put it on too tight or really tightened an N cable onto the adapter, spinning both adapter and cable, over tightening the adapter to the port. Do use the padded jaw pliers with the hex wrench so that you don’t twist the port connector.

Don Bitters
 

Thanks, guys.
Yes, what I really need to do above all is avoid over-torquing/over-stressing the connector at the point where it goes into the bulkhead. If I can get them apart without doing that, I don't see how I could cause any damage.

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