Change 12005
NAVAIR 01-1A-509-3
01 March
15 July 2008
TM 1-1500-344-23-3
TO 1-1-689-3
Use Pipe Cleaner (Volume IV or V, Chapter 3) to remove
solvent from pin area.
Compound, Corrosion Preventive
3
Water-Displacing
MIL-PRF-81309
Sealing Compound
19
(1) Remove light corrosion products by cleaning
MIL-PRF-8516
with a Toothbrush, A-A-123, or Cleaning Cloth,
CCC-C-46 Class 7, dampened with MIL-PRF-81309
c. For those connectors exposed to fluids that
Type III.
adversely affect Room Temperature Vulcanizing (RTV)
Coating, MIL-A-46146 (e.g. dielectric coolant, turbine
(2) Remove moderate corrosion products with
oil, hydraulic fluid), apply Sealing Compound, Synthetic
a small non-abrasive mat, A-A-3100, dampened with
Rubber, Accelerated, MIL-PRF-8516 (Volume IV or V,
MIL-PRF-81309 Type III.
Chapter 2) to the connector backshell and wire bundle
instead of MIL-A-46146. The Sealing Compound,
d. Wipe residue with Cleaning Cloth, CCC-C-46
Synthetic Rubber, Accelerated, MIL-PRF-8516,
Class 7 (Volume IV or V, Chapter 2).
provides very stable (fluid resistant) sealing where
temperatures do not exceed 200F (121C).
6-3.11.3. Sealing Connector Backshell. Moisture
intrusion into a connector often occurs by way of the
Alcohol, Isopropyl
6
backshell. This problem is particularly acute after
TT-I-735
damage to the seal occurs during pin replacement.
The backshell may be sealed as follows:
e. Apply Isopropyl Alcohol, TT-I-735 (Volume IV or
V, Chapter 2), one part alcohol to one part fresh water,
a. Verify that sealing plugs ("dog bones") are
with Brush Typewriter, A-A-3077 Style T (Volume IV or
installed in unused contactor cavities.
V, Chapter 3) or Toothbrush (Volume IV or V, Chapter 3).
Scrub connector mating areas, threads, shell and
b. Remove retainer ring and mylar tape (if present)
mounting plates.
from the back of the electrical connector. Pull backshell
and retainer ring clear of electrical connector.
f. Remove excess solvent and residue with Cleaning
Cloth, CCC-C-46 Class 7 (Volume IV or V, Chapter 2).
c. Tie back shielded wire pigtails, where applicable.
6-3.11.2. Internal Corrosion Removal and Cleaning.
Adhesive/Sealant, Silicone RTV
1
Non-Corrosive
Alcohol, Isopropyl
6
MIL-A-46146
TT-I-735
d. Apply RTV, MIL-A-46146 Type 1 (Volume IV or
NOTE
V, Chapter 2), by inserting sealant applicator nozzle
into wire bundle at the back of the connector (refer to
On most connectors the receptacle (female)
Figure 6-7). Squeeze the tube while slowly withdrawing
contacts are difficult to clean. If corrosion is
the nozzle from the wire bundle at the back of the
found, the most practical solution is pin
connector. Repeat the application of sealant two or
replacement.
three times at different locations around the wire
bundle. The sealant will self-level in approximately 15
a. Apply Isopropyl Alcohol, TT-I-735 (Volume IV or
minutes. Recommended thickness is 116 inch across the
/
V, Chapter 2), with Acid Brush, A-A-289, style optional
entire rear grommet. If, after 15 minutes following the
(Volume IV or V, Chapter 3).
first application, there is not enough to entirely seal the
back of the connector, additional sealant may be added,
b. Wipe excess solvent and residue with Cleaning
but in no case shall the depth of sealant exceed 1/8 inch.
Cloth, CCC-C-46 Class 7 (Volume IV or V, Chapter 2).
6-31
