TO 35-1-3 - Robins Air Force Base

TO 35-1-3
2.1.7.2 Cleaning Compounds. Cleaning compounds may
impart Biochemical Oxygen Demand (BOD) to the washwater
and increase the pH. Therefore, use of excessive amounts of
cleaning compounds should be avoided.
2.1.7.3 Water Temperature. Hot-water washing breaks the
bond between the grease/oil and the SE, flushing away the
grease and oil. Engineering studies have concluded that hotwater
washers reduces the cleaning compound usage, as
opposed to cold water washing, by approximately 80 percent,
cleaning times by 20 to 75 percent, and potable water usage 30
to 90 percent. Hot water shall be used, when feasible, for SE
cleaning operations.
2.1.7.4 Deployed/Remote Sites. At deployed/remote sites,
untreated, raw water can significantly impact the levels of dissolved
metals/minerals in the washwater. Raw water could
dissolve metals from building and washwater plumbing systems,
including copper from copper pipe, zinc and lead from
galvanized pipe, etc. To assist units in deployed locations the
following water quality standards are listed below. Unless an
emergency exists, organizations should have the nearest DoD
civil engineer assess the water quality standards at the
deployed locations prior to the commencement of washing
operations. Refer to Chapter 7 for units deploying or returning
from Southwest Asia (SWA) environments.
2.1.7.4.1 Water Assessment. In assessing the site wash
water, the key water quality parameters: Potential of Hydrogen
(pH), water hardness, total dissolved solids (TDS), and dissolved
oxygen (DO) help assess the corrosivity of the water
supply. In general, low pH (less than 7.0), and hardness (less
than 50 milligrams per liter), and high DO content, values
approaching saturation, greatly increase the corrosivity of the
water.
2.1.7.4.2 Engines and Engine Components. Engines and
engine components are usually washed in a washrack using a
pressurized hot water or steam cleaner. Cleaning compounds
may be used in the washing process. Care should be taken to
ensure the forced water and/or steam is not allowed to migrate
or be forced into confined areas that would prevent proper
drying as subsequent corrosion could result. A water displacing
CPC should be applied as soon as possible after washing
to corrosion prone areas such as piano hinges, behind seals,
etc.
2.1.8 Cleaning of Non-metal Parts Prior to Painting. To
ensure proper adhesion between the coating and non-metal
part being painted special consideration must be given to
ensure the part is properly prepared for painting.
2.1.8.1 Composites. Clean with Isopropyl Alcohol,
TT-I-735, Acetone, O-A-51, or a solution of one part
MIL-PRF-87937 to fifteen parts water.
a. (MIL-PRF-87937 only). Rinse with water or wipe clean
with a damp cloth.
b. (MIL-PRF-87937 only). Allow to dry or blow dry with
compressed air not to exceed 30 PSIG.
2.1.8.2 Plastics. Clean with a solution of one part
MIL-PRF-87937 to four to fifteen parts water, depending on
the soil. The heavier the soil, the stronger the solution needs to
be. MIL-PRF-87937 must be diluted to work effectively.
a. Rinse or wipe clean with a damp cloth.
b. Allow to dry or blow dry with compressed air at less
than 30 PSIG.
2.1.9 Cleaning of Electrical Parts. The electrical insulation,
wiring, contact pins and components are subject to the
collection of oil, fungus, and dirt. Cleaning can be accomplished
as follows:
Do not clean electrical equipment with the power on.
There are hazards of personnel being shocked or electrocuted.
Disconnect batteries prior to cleaning electrical
generator sets as shorting of switches may
cause power to be applied to system.
Any solvent must be used with extreme care on insulation
and insulated wires, particularly in electric
equipment.
2.1.9.1 Insulation, wiring and parts shall be cleaned with a
clean cloth or sponge and the use of TT-I-735 Isopropyl Alcohol.
Solvents such as dry cleaning fluids, mineral spirits, or
paint thinners shall not be used to clean electrical insulation,
insulated wiring and parts because of the injurious affect of
these solvents on materials, such as rubber and fiber, and they
are fire hazards.
2.1.9.2 Pins (male contacts) and receiver holes (female contacts)
which are contaminated by fungus growth can be
cleaned by wiping with TT-I-735 Isopropyl Alcohol. A clean,
lint-free cloth moistened with the solvent should be used to
wipe the pins and a toothpick or pipe cleaner saturated with
the solvent should be used to wipe out the holes.
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