Fat chance of finding the service manual....Three years ago some one called from the Navy museum up east wanting permission to use my artwork when i worked a Universal Match ,,UniDynamics on Special rocket launchers,,,ASROCK and Terrior ,,,Anti Submarine rockets...I finally found all the rest of the artwork and manuals and sent them on... Maybe i,ll trip over the Lincoln stuff... I remember at Lincoln,, Alex Fox (Pres.) would drop by our Eng. office next to the factory.. He would place his pipe and tobacco on a shelf next to the door...When he whent into the factory some body would place cut up rubber bands in the tobacco pouch....He would reciprocate by spitting tobacco juice on our office walls...Alex was a neat guy he even let me drive his Porche,,, Lincoln Eng. was full of cutups. I could go on about the Christmas parties..One of the gals in the office i still keep in touch with,,, She married into the DIESEL family,, Yes the real designers of the DIESEL ENGINE used through out the world. (Rudy Diesel).... But the Lincoln Changer was a unique side product.. But the prime products were the Lubrication gear.