[R-390] Cleaning modules Gear Train Cleaning

[Flowertime01 at wmconnect.com]

Bob,

You ask about cleaning the gear train.

Back when (68 75) we hung the receiver off the edge of a bench.

You can run lots of cleaner through the gear train and let it run out.

Kerosene was the available solvent.
Followed by compressed air.

Brush it in and blow it out.

Simple green is used a lot today but see Cecil's comments below.

Remember to do the small roller bearings on the rack slides.
And the back end cams. A little less solvents.

Make up a small hose wand for your vacuum cleaner and us it to suck
up solvent as you brush it in. Use water base with the vacuum.
I do not want to read about the vacuum cleaner flashing.

Mobile Synthetic oil is the lube of choice these days once you get it clean.

Hang out at the local Mobile station and glean a few empty bottles out of the 
trash cans. You can drip a life time supply of oil out of a few bottles this 
way.

> 
> I've used the original Formula 409, a brush and the garden hose.  I blow the 
> modules off with my compressor carefully and let them sit in the sun.  Then 
> they go back inside where the A/C pulls the rest of the moisture out of them 
> for several days before applying power.
> 
> Works great.
> 
> Be aware that Simple Green that is not fully washed away reacts with 
> aluminum.  Guys were cleaning up in the airframes of General Aviation 
> aircraft and corrosion problems started occurring.  It has been pretty well 
> publicized in those circles to stay away from Simple Green for that reason.
> 
> I wouldn't worry as much about it in a radio but make sure you rinse 
> extremely well!
> 
> Cecil
> 

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