[RGK20m3]

I redid mine maybe 5 years ago; I recall that there were12 or 13 wires to disconnect, and the dial assembly was completely disassembled ( which was needed anyway as the coupler was rock hard and distorted from years of shaft misalignment due to the sub chassis mounting bushings having perished) and the dial was broken . I don’t recall any specific problems taking it apart.
Renovated Radios sells the sub chassis mounting bushings; I disassembled the coupler and replaced the rubber pieces with new cut from reinforced neoprene sheet.
Dial alignment is finicky and isn’t stated in the literature, use the procedure for the 38-116 if you want it to track correctly. The photo attached is of a similar shaft coupling that I just redid on a 38-7
Search “38-690” and read all the threads…..