[R-390] RF deck questions

[Andy Williams]

I finally had time to start work on the R-390 I bought last year. 
Last weekend, I discovered that the RF deck will not mechanically 
tune past the 25 MC band. Since this unit has had some bad repairs 
done in the past, I was wondering if this could be the result of 
installing the RF deck without the green gear? Or is this likely to 
be a mechanical failure?

Which brings up another question: What do I use to clean and 
lubricate the gear train? Will SuperTech General Purpose Lithium 
grease work?

So far I replaced 1 tube socket in the power supply, the 4 47 ohm 
resistors in the power supply and half the power supply wiring 
harness. In the audio module I replaced C607 as a precaution, the 4 
47 ohm resistors, fixed several bad solder connections and replaced 
some of the wires. The B+ regulates at 190v after replacing R626.

Andy