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CHAPTER 3. MAINTENANCE CLEANING PROCEDURES AND ALTERNATIVE SOLVENTS SELECTION GUIDANCE
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TB-43-0135 Environmentally Safe Substances for use with Communications-Electronics Equipment Manual
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Recommended DGSC managed alternative materials


TB 43-0135
SECTION II. REVISED CLEANING PROCEDURES
WARNING
Compressed air is dangerous and can cause serious harm if protective means or methods are not
observed to prevent a chip or particle (of whatever size) from being blown into the eyes or
unbroken skin of the operator or other personnel. Compressed air shall not be used for the
cleaning purposes except where reduced to less than 30 pounds per square inch gauge (30 psig)
and then only with effective chip guarding and personnel protective equipment (industrial safety
glasses and full face shield). DO NOT use compressed air to dry parts when solvent cleaners
have been used.
WARNING
Use solvents in well ventilated areas only. Avoid prolonged breathing of vapors. Avoid bodily
contact. The use of chemical gloves (solvent resistant) and chemical splash goggles are required
when using solvent materials. Do not use near heat, spark or flame. Solvents may be reactive
with acids and oidizers; do not mix or cross-apply with other cleaners or chemicals. Organic
vapor respirator with dust and mist filter is recommended when solvent is spray applied. Keep
containers closed between applications. Provide mechanical ventilation if used in closed spaces.
Coordinate the use of this material with your supporting Industrial Hygiene and Safety Offices.
Ensure that you read and understand the Material Safety Data Sheet (MSDS) for the solvent prior
to use.
WARNING
Handle solvents as combustible liquids. Store cleaning materials in a well ventilated area away
from food or drink and away from heat, sparks and flame. Keep container sealed when not in
use. Solvent saturated waste rags must be placed in a sealed metal container after use to avoid
the possibility of spontaneous combustion.
3-4.
General recommendations for solvent cleaning procedures
a. Where solvent cleaning is required the least hazardous and the weakest strength material, which will achieve the
desired results , should be selected. Ensure that you read and understand the Material Safety Data Sheet (MSDS) for the
solvent prior to use.
b. Solvent cleaning is generally appropriate when rapid drying is required, where material such as paint or adhesives
will be applied shortly after cleaning, where electronic components are unsealed or where electrical power will be applied
to the equipment shortly after cleaning
c.  Most of the alternative solvent cleaner evaporates (dry) at a much slower rate than the materials they are
replacing. In general wiping surfaces dry with a clean cloths, to remove as much solvent material as possible, will speed
the drying process. Do not use forced air or heat to speed the drying process unless these procedures have been
approved by both technical and Heath and Safety personnel.
d. Solvent cleaning is generally performed using a damp cloth, a saturated soft bristle brush or low pressure spray
process. When using cleaning solvent follow all Safety precautions and use the least amount of solvent that will achieve
the desired results.
3-5.
Typical Solvent Cleaning Procedures
Use the procedure that most closely duplicates the existing procedure in your technical manual
a. Remove grease, fungus, and ground-in dirt from surfaces with a clean, lint-free cloth dampened (not wet) with a
Non-Ozone Depleting Chemical Solvent, (see list of recommended solvents below).
3-2


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