Maintaining postwar engines has always been troublesome for me. I've made several posts asking what the right way is but I still can't seem to get it right. I have a 611 NW-2 that makes a horrible grinding noise as it putters along. My 2055 steamer no longer runs and stops after moving a few inches. Santa Fe F3 has stopped and won't even move. The old gunk inside the engines near the gears has to be cleaned out. What do I clean it with? And then what do I replace the old grease with? Many have said mineral spirits but would isopropal work as well? I have a train show coming March 5th and I would like to get all of them in operational condition so I can run them on my layout. Help would be appreciated!
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