I picked up a pretty nice Pressman D for small money a while ago. The back rotates but is very, very stiff. I don't think this is normal as one shouldn't need three hands to turn it; in its present state the rotating-back feature is not terribly useful.
It would seem some lubrication is in order, but here's my problem. It's totally unobvious how the mechanism actually works since all the surfaces I can see during rotation are basically flat. I tried a very light film of moly grease which didn't seem to help. I assume there's something inside that really does the work, and is where the lube should go.
If I rotate the back to 45 degrees I gain access to four screws in the corners, which I guess hold things together, but I'm nervous about disassembling it in case it's massively spring-loaded - the last thing I want/need is bits and pieces flying all over.
So far I haven't found any disassembly pictures or info on the web. Has anyone ever operated on one of these and documented the process? Better yet, does someone have access to a factory assembly or service manual?
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