Any tips for removing a stuck Hollis Reg Cover?

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A picture and all that...

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OK, I have one possible solution, but before I go to it, I am going to try another.

I talked with the manager of a major Hollis dealer, and I asked him about this problem. He said that they have learned that pretty much nothing will work--once the 212 is frozen, it is frozen. When they encounter the problem, they now simply break the cover, discard it, and put on a new one.

I asked him about drilling two holes and using a spanner. He thought I might as well give it a shot before going the route of breaking the faceplate.
 
OK, I have one possible solution ...

I talked with the manager of a major Hollis dealer. When they encounter the problem, they now simply break the cover.

The hammer solution ...
 
SUCCESS!

I drilled two small holes opposite each other on the top edge of the face plate, right next to the metal ring. The holes were not deep--no need to go all the way through. Then I used an adjustable face spanner, inserting the prongs into the two holes. It opened easily.

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For the lower tec techs among us: a pin spanner can be quite easily made with a couple nails, a Hollis approved hammer :wink:, and a chunk of wood. Otherwise they are cheap off ebay or can be found in a bicycle repair shop.

... Love the solution with the pin spanner. A tec guru I know down south also applies the hammer directly as your original post suggests.
 
They can be purchased for a very low price from a number of outlets. I used one at a shop where I have an association, and I ordered one of my own today. You need one to open a number of models of first stages anyway.
 
Try some rubber gloves to get a better grip on the cover.
(Latex, dishwashing, drysuit gloves)
Can't believe it, dishwashing glove solved my stuck after 2 years trying to open it!
 
https://www.shearwater.com/products/teric/

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