TO 1-1-700 - Robins Air Force Base
TO 1-1-700 - Robins Air Force Base
TO 1-1-700 - Robins Air Force Base
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<strong>TO</strong> 1-1-<strong>700</strong><br />
10.8 STEEL CABLES.<br />
Whether made of plain low carbon steel or stainless steel<br />
(CRES), cables are highly susceptible to corrosion. The presence<br />
of bare spots or cracks (see Figure 10-9) in the plastic<br />
cladding on clad cables and gaps where the protective CPC<br />
coating is missing on other cables are the main contributing<br />
factors to the corrosion of cables. Dirt, grime, and rust that<br />
collect between cable strands lead to more severe corrosion<br />
and wear that eventually cause cable failure. Inspect accessible<br />
cables for these conditions as well as for signs of wear, fraying,<br />
binding, kinks, excessive dirt/grease build-up, and corrosion.<br />
Check the cable for corrosion by twisting the fibers and<br />
checking for rust in the interior of the cable. Use the following<br />
procedures to treat steel cable corrosion:<br />
Solvent to clean steel cables. Excessive solvent<br />
will remove internal cable lubricant and allow the<br />
cable strands to abrade and further corrode.<br />
a. If the surface of a cable is corroded, relieve cable tension<br />
and carefully force the cable open by reverse twisting.<br />
Visually inspect the interior. Corrosion on the<br />
interior strands constitutes failure and the cable must be<br />
replaced.<br />
b. If no internal corrosion is detected, remove loose external<br />
rust/corrosion with a clean, dry, coarse-weave rag or<br />
fiber brush and clean the cable with a clean cloth dampened<br />
with MIL-PRF-680, MIL-PRF-32295, Type II, or<br />
A-A-59601, Type II or III Dry Cleaning/Degreasing<br />
Solvent or other cleaner as specified by system-specific<br />
manuals or the equipment<br />
c. SPM.<br />
MIL-PRF-32295, TYPE II, CLEANER, NON-AQUEOUS,<br />
LOW-VOC, HAP-FREE<br />
Figure 10-9. Steel Control Cables<br />
MIL-PRF-81309, LUBRICANT, CORROSION PREVEN-<br />
TIVE COMPOUND 46<br />
MIL-PRF-680 AND A-A-59601, SOLVENT, DEGREASING,<br />
TYPE II AND III 45<br />
MIL-L-87177, LUBRICANT, CORROSION PREVENTIVE<br />
COMPOUND, WATER DISPLACING 32<br />
• Consult the applicable system specific maintenance<br />
manual for cable de-tensioning and tensioning<br />
requirements prior to performing any maintenance<br />
on pre-tensioned cables.<br />
• Do not use metallic wools to clean steel cables.<br />
The use of metallic wool will cause dissimilar metal<br />
particles to become embedded in the cables and<br />
create further corrosion problems (galvanic corrosion).<br />
Use only a clean cloth dampened with, MIL-<br />
PRF-680, MIL-PRF-32295, Type II, or A-A-<br />
59601, Type II or III Dry Cleaning/Degreasing<br />
MIL-PRF-16173, COMPOUND, CORROSION PREVEN-<br />
TIVE 37<br />
c. After thorough cleaning, apply a thin film of either<br />
MIL-PRF-81309, Type II; MIL-L-87177, Type I or II,<br />
Grade B; or MIL-PRF-16173, Class II, Grade 4 Water<br />
Displacing CPC to the cable surface either by aerosol<br />
spray or with a cloth dampened with the CPC. Follow<br />
with a liberal amount of MIL-PRF-16173, Class II,<br />
Grade 4 CPC applied with a non-metallic bristle brush.<br />
Wipe off any excess CPC as excessive CPC build up<br />
will interfere with the operation of cables at fairleads,<br />
pulleys, or grooved bell-crank areas.<br />
10-8 Change 3