[R-390] Benchmark - R390A odd-ball cleaning and lubrication

[Tisha Hayes]

Something overlooked is when doing a geartrain teardown and rebuild is to
deburr any gear-teeth. It is referred to in the addendum douments of Y2K to
remove any burrs on the sides of the gears with a fine file.

I use an ammonia based jewelry polish to remove the dull oxides from brass
gears and to make them shine. Polishing is with a lambswhool rotary wheel,
it quickly finds burrs on gears that I touch up with a fine file. The polish
also works really nice on the metal baseplate where the gears mount to but
it will remove the indexing lines so I use a spring loaded center punch to
make a permanent index for gear alignment. The bushings get cleaned out with
the jewelry polish and a cotton swab.

I do use grease (tungsten disulfide with a synthetic carrier oil) (MK Impex
Canada, MK-WS2-HT) on bushings and bearings as it's coefficient of friction
is 0.015. For sliders and gearteeth I use Mobil 1 (Mobil 1 contains ~70 ppm
of moly). Looking into one of my radios you will not even see the grease. It
is exactly where it should be, between metal pieces in close contact.
-- 
Ms. Tisha Hayes/ AA4HA
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"I'll be a diode, cathode, electrode
Overload, generator, oscillator
Make a circuit with me." -- The Polecats