Been working on my 2-6-2 prairie, got the space below the fireman finished and cleaned the wheels on the tender and engine. Being as this engine has been sitting for a while I figured I better lube it up, and good thing as in the gearbox area I found it covered with a white substance, more like flakes and dust and plenty of it on the gears and body of the gear box. So I pulled the motor block assy out so that I could examine the top side and it was even worse. Found the culprit was the lead weighs at both ends of the motor housing. They had oxidized and the flaky oxidization was covering just about everything. So a good cleaning with plastic safe electronic cleaner and new oil ( trying some new stuff called liquid bearing ) got it all back together to test. No go, nothing so started checking and found that not only is the new lubricant very slippery it is also a very good electrical insulator, and I mean very good. Of course most oils are same but even after wiping off surfaces with a clean rag I was still unable to get a ohm reading thru the electrical contacts. So back with the electronic cleaner and testing. finally everything was in working order then finding a bad motor and replaced it, now having a running engine. Cleaned the lead weights off and spray painted them with a rattle can. The engine has been sitting in the garage for sometime and it is rather humid here in Florida and guess the moisture just got to it especially with the hurricane last year. So be careful with the led weights and lubricate sparingly, Bill