[R-390] Gear train cleaning

[Patrick]

The way I have done several ones is to take the RF subchassis out (you must 
follow the manual instructions), then I take out the ferrite slugs and the 
cans easy job...with the unit now as mention and outside on a crate, I spray 
carburator cleaner at will to clean the whole gear assembly, one took 2 
cans, but they do clean good, after that I clean with  a oily rag all of the 
slats where the ferrite slugs slide on making shure that there is no deposit 
of grease at the bottom, also clean very good the ferrite slides (be careful 
not to damage the slugs themselves)., this is a good time to give the entire 
assembly a good cleaning, I ussualy do it with a damp cloth followed with an 
oily one and then a dry one. Now lubricate the gears, cams and cam followers 
(I use 10 oil), but be careful not to overlubricate, that cause more 
problems by attracting dirt, I use a seringe to make sure to reach with a 
small dab of oil all places, as you oil, move the gears to evenly distribute 
the oil......now  since you have the unit out check for the cam alignemet, 
correct it if out of specs and you are ready to replace unit....to me the 
most tedious part is to take the front panel out and then replace it. After 
this procedure and with the receiver being use in a normal house 
environment, I have never had to do it again.

Goog luck.....Pat
----- Original Message ----- 
From: <n4tua at aol.com>
To: <r-390 at mailman.qth.net>
Sent: Tuesday, July 12, 2005 9:20 AM
Subject: [R-390] Gear train cleaning


> Hello Fellows,
> I am wanting to clean and re lubricate the 390A gear train. Are there any 
> suggestions as far as who's approach is best? Is it worth doing? I mean 
> doing right like KK4DF describes in his procedure. Any suggestions would 
> be appreciated.
>
> Thank you, Collin
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