NAVAIR 01-1A-509-3
01 March 2005
TM 1-1500-344-23-3
TO 1-1-689-3
2-5.2.1. General. Experimentation with cleaning
CAUTION
support equipment is not an authorized practice.
Damage to circuit components may result from
Paper capacitors and paper-bound
reactions to chemical solutions used in cleaning
components disintegrate in Detergent, MIL-D-
equipment. Avionic technicians should understand the
16791, solution.
functions, capabilities, and restrictions that apply to
each piece of cleaning equipment. This will prevent
c. Detergent, MIL-D-16791 (Volume IV or V,
damage to avionic equipment and circuit components
Chapter 2) is the specified detergent. This detergent
that could result from improper use. Each piece of
solution shall be mixed 1 ounce (2 tablespoons)
cleaning equipment has been selected to perform
detergent to 1 gallon of water.
specific functions. The following paragraphs identify
these intended functions and include general limitations
2-5.2.2.2. Sealed bearings, synchro and servo
as applicable to each type of support equipment.
bearings, instrument bearings, and similar devices
with permanently lubricated bearings can experience
lubricant removal. These devices would be rendered
NOTE
useless unless there are procedures specified in the
Maintenance personnel should refer to
applicable service directives for relubrication. When
appropriate cleaning equipment service
practical, avionic equipment containing such bearings
manuals for specific operating instructions.
can be cleaned by aqueous ultrasonics if the bearings
are sealed in a plastic bag.
2-5.2.2. Aqueous Ultrasonic Cleaner. The following
2-5.2.2.3. S e a l e d components (other than
is a list of the specific restrictions that apply to the use
hermetically sealed) can trap detergents and water.
of Aqueous Ultrasonic Cleaner (Volume IV or V,
This may cause drying problems. In each case, the
sealed component shall be opened to eliminate
detergent traps.
CAUTION
2-5.2.2.4. Thin metal foil types of gummed labels can
Miniature and microminiature printed circuit
loosen and separate.
boards (PCBs) may be susceptible to damage
due to ultrasonic frequency, power level, or
2-5.2.3. Solvent Ultrasonic Cleaner. The following is
both. Due to the difficulty of determining which
components may be damaged, ultrasonic
a list of the specific restrictions that apply to the use of
cleaning of PCBs is not authorized unless
Solvent Ultrasonic Cleaner (Volume IV or V, Chapter 4):
specified. For additional information, refer to
NAVAIR 01-1A-23 (Navy) or TO 00-25-234
(Air Force).
Alcohol, Isopropyl
6
2-5.2.2.1. The Aqueous Ultrasonic Cleaner is used
TT-I-735
for the removal of dirt, dust, salt spray deposits, and
corrosion products. This is achieved by ultrasonic
2-5.2.3.1. The Solvent Ultrasonic Cleaner is used to
scrubbing action in detergent and water solution.
remove light to heavy oil, grease, and hydraulic fluid
contamination by ultrasonic scrubbing in a solvent
a. The maximum operating temperature shall be
solution.
130F (54C). The operating frequency used shall be
20 kHz.
a. The maximum operating temperature shall be
the solvent's boiling point. The maximum operating
b. An additional function of the equipment is that of
frequency used shall be 40 kHz.
"presoaking" avionic equipment and components prior
to the ultrasonic function.
b. Solvent, Cleaning, ENVIROSOLV 654CR
(Volume IV or V, Chapter 2), may be used in solvent
ultrasonic cleaner applications. MIL-PRF-680 Type III
2-17