We have several of the master trailer hitch locks, all keyed alike. I picked up a 36 for a new trailer and thought it would be a snap to pull the cylinder from one of the others and slip it in the 36 so it would be keyed like the rest of the fleet. I operated the lock, and pulled the threaded plug, but do not see an obvious way to release the cylinder assembly. I had assumed there would be a circlip or something accessible when the lock was in the open position and the plug removed, but nothing. There is what looks like a drive pin or rivet on the side of the housing. Must that be drilled? Surely not.
This makes me furious because I rekeyed one of these maybe 20 years ago, and I should be able to figure it out. Ugh.
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