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[quote user="wjstix"][quote user="marknewton"]Very helpful - a simplified explanation for a non-technical audience. The part referred to as a "locking pin" is the lock lifter.[/quote]...which looks a great deal like the "pin" from a link-and-pin coupler, which is why it's been called "the pin" for 100 years or so by US railroaders (but maybe not by Aussie "railwaymen"??[:D]) Bottom line is, if you took fifty US railroaders and asked them to show you a car's lock lifters, you might get one guy who could point it out and 49 blank stares. Ask them to show you the pin and they'd all know it's the part that opens the coupler when they lift the cut lever.  [/quote]Railroaders are more than just those in train service.  Which department are your 50 railroaders drawn from?  Operating or mechanical?  I started out 30 years ago in engineering, moved to mechanical, moved to operating, was moved to signal, and now I've been moved into network planning and capacity design.  There's slang and there's proper terminology.  Mark Newton quotes the manual, that's good enough for me. S. Hadid
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