The pictures in my scanned copy of the R-392 manual (purchased on eBay) are really bad so I scanned better pictures from the parts manual. Here there are in case you find them of use: https://drive.google.com/file/d/1d53rgD6hedQsF78SUjfBrxek8ZlEboj_/view?usp=sharing 73, Mack W4AX https://www.qrz.com/db/W4AX