NAVAIR 01-1A-509-3
01 March 2005
TM 1-1500-344-23-3
TO 1-1-689-3
Avionics Grade, MIL-C-81309 Type III (Volume IV or
NOTE
V, Chapter 2), to all areas of the relay or circuit breaker,
Corrosion (tarnish) removal is required on
avoiding contact and mating areas.
most types of contacts. Tarnish acts as an
insulator on contacts. The sliding-type contact
NOTE
has a self-cleaning action, and tarnish removal
is not required if a bright surface area is
After application of preservative to relays and
visible. Relay and circuit breaker contact areas
circuit breakers, it is necessary to ensure
are usually plated with a highly conductive
removal of the preservative material from the
metal. Care should be taken not to remove this
contact points and mating surfaces.
plating surface. If the plating is removed, exposure
of the base metal will cause corrosion and the
relay/circuit breaker should be replaced.
Solvent, Degreasing
7
a. Heavy corrosion and tarnish shall be removed
MIL-PRF-680
by rubbing contact surfaces with Typewriter Eraser.
Large contact areas may be cleaned using Eraser,
(2) Wipe the contact points and mating surfaces
Ruby Red (Volume IV or V, Chapter 2).
with Cleaning Cloth, CCC-C-46 Class 7 (Volume IV or
V, Chapter 2), Applicator, Cotton Tipped (Volume IV
b. Medium to light corrosion and tarnish shall be
or V, Chapter 3), or Pipe Cleaner (Volume IV or V,
removed by rubbing contact surfaces with Eraser,
Chapter 3), as applicable, dampened with Degreasing
Wood Encased (Volume IV or V, Chapter 2). Large
Solvent, MIL-PRF-680 Type III (Volume IV or V,
contact areas may be cleaned using Eraser, Ruby Red
Chapter 2) to remove Water Displacing Corrosion
(Volume IV or V, Chapter 2).
Preventive Compound. Wipe with Isopropyl Alcohol,
TT-I-735 (Volume IV or V, Chapter 2). This is necessary
or contacts will not function electrically.
6-3.7. S W I T C H E S . Switches shall include all
Alcohol, Isopropyl
6
TT-I-735
cam-operated toggle, rotary, interlock, and pushbutton
types. Remove corrosion and treat as follows:
c. Rinse contacts with Isopropyl Alcohol, TT-I-735
(Volume IV or V, Chapter 2), and Applicator, Cotton
Tipped (Volume IV or V, Chapter 3). Clean relay or
circuit breaker assembly with Acid Brush, A-A-289,
Alcohol, Isopropyl
6
style optional (Volume IV or V, Chapter 3). Pipe
TT-I-735
Cleaners (Volume IV or V, Chapter 3), may be used in
hard-to-reach areas to assist in swabbing residue.
d. Wipe relay or circuit breaker assembly with
Solvent, Degreasing
7
Cleaning Cloth, CCC-C-46 Class 7 (Volume IV or V,
MIL-PRF-680
Chapter 2), and allow to air dry.
a. Apply Isopopyl Alcohol, TT-I-735 (Volume IV or
e. Relays and contacts shall be preserved as
V, Chapter 2) or Degreasing Solvent, MIL-PRF-680
follows:
Type III (Volume IV or V, Chapter 2), with Acid Brush,
A-A-289 style optional (Volume IV or V, Chapter 3), or
Toothbrush (Volume IV or V, Chapter 3). Scrub the
switch to remove corrosion and contaminants.
Compound, Corrosion Preventive
3
Water-Displacing
b. Wipe with Cleaning Cloth, CCC-C-46 Class 7
MIL-C-81309
(Volume IV or V, Chapter 2). Allow to air dry.
(1) Apply a thin film of Water Displacing
Corrosion Preventive Compound, Ultra-Thin Film,
6-27
