Hey guys, FINALLY received an Optimal Optimus off Ebay today, item was loose and Used, but nowhere near in as Good condition as the seller made it sound.
The Ratchet that connects to the piece of blue chrome (The Shoulder joint essentially.) on the Right arm is impossible to move, once I put it in place to convert to Jet mode it refused to budge. So...how do I go about fixing it?

Can it be dissassembled? My partner has suggested pouring graphite powder into it, will that work?

I've waited ten years for this toy and would be really upset if I had to get a new one, any hints on how to fix it would be greatly appreciated.