TO 1-1-700 - Robins Air Force Base

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TO 1-1-700 f. Devices with permanently lubricated components (primarily bearings) can experience lubricant removal in the presence of MIL-D-16791 and shall not be cleaned in the aqueous ultrasonic cleaner. Equipment containing these components may be cleaned in the aqueous ultrasonic cleaner provided the lubricated components are securely sealed in a plastic bag. g. Sealed components may trap water. After cleaning, all sealed components shall be opened to eliminate water traps and to facilitate drying. 8.6.2.3.1 Solvent Ultrasonic Cleaner. The solvent ultrasonic cleaner works similarly to the aqueous ultrasonic cleaner, except that it uses a solvent solution instead of a detergent solution for the bath. It is used to remove light to heavy oil, grease, and hydraulic fluid contamination by ultrasonic scrubbing in a solvent solution. The following guidelines shall be observed while operating the solvent ultrasonic cleaner: a. The solvent ultrasonic cleaner may be operated at any temperature up to the solvent's boiling point. The maximum operating frequency is 40 kHz. The solvent shall be specified by the manufacturer or maintenance authority. b. Neoprene materials (particularly coaxial connector gaskets) are vulnerable to damage from the solvent and shall not be cleaned in the solvent ultrasonic cleaner unless all vulnerable areas are sealed in a plastic bag. c. Devices with permanently lubricated components (primarily bearings) can experience lubricant removal in the presence of solvents and shall not be cleaned in the solvent ultrasonic cleaner. Equipment containing these components may be cleaned provided the lubricated components are securely sealed in a plastic bag. d. The solvent ultrasonic cleaner may be used as a solvent degreaser. When used as a degreaser, the solvent ultrasonic cleaner does not use the ultrasonic vibration function. Therefore, the cleaner may be used to rinse and dry PCBs provided that all other restrictions in this paragraph are followed. e. Sealed components may trap the solvent solution. After cleaning, all sealed components shall be opened to eliminate water traps and to facilitate drying. 8.6.2.3.2 Water Base Solvent Spray Booth. MIL-D-16791, DETERGENT, NON-IONIC 22 The water base solvent spray booth removes dirt, dust, salt spray deposits, and light corrosion products. This is achieved by spraying the components with a detergent and water solution. The detergent solution is composed of 1 ounce of MIL- D-16791 for 1 gallon of water. In addition, it can spray water for rinsing purposes or compressed air for drying. The following guidelines shall be observed while operating the water base solvent spray booth: a. The water base solvent spray booth can be used as a precleaner to remove contaminants before the component is cleaned using another method. b. Devices with permanently lubricated components (primarily bearings) can experience lubricant removal in the presence of the detergent solution and shall not be cleaned in the water base solvent spray booth. Equipment containing these components may be cleaned provided the lubricated components are securely sealed in a plastic bag. c. Sealed components may trap the solvent solution. After cleaning, all sealed components shall be opened to eliminate water traps and to facilitate drying. 8.6.2.3.3 Abrasive Tools. Abrasive tools are commonly used for corrosion removal in a variety of circumstances. The following guidelines provide some instructions and restrictions regarding the use of abrasive tools on electronic equipment. a. Mono-basic sodium phosphate or glass beads used in abrasive tools can become trapped in miniature and micro miniature female edge connectors. When using a blast cabinet on components using these connectors is necessary, they shall be sealed with SAE-AMS-T- 21595, Type I Pressure Sensitive Tape. The tape shall be removed and any adhesive residue removed immediately after cleaning. b. Delicate metal surfaces are extremely vulnerable to damage if abrasive tools are used improperly. Operators shall exercise extreme care when using abrasive tools on electronic equipment. c. Abrasive blast cabinets shall not be used on equipment that is sensitive to electrostatic discharge (ESD) in any circumstance. 8-26
TO 1-1-700 8.6.3 Cleaning Procedures/Selection Criteria. Always select the mildest method of cleaning that will accomplish the task. Circuit components can be damaged if cleaned using the wrong support equipment. The method used shall be based on: a. Type and severity of the contamination or corrosion. b. Accessibility of the contamination or corrosion. c. Type of electronic equipment. 8.6.3.1 Hazards of Cleaning. Always use the gentlest materials and cleaning methods that will ensure complete cleaning or corrosion removal. In addition, always use the correct cleaning solutions mixed to the proper concentrations. Substitutions are not permitted. Using incorrect equipment, or solutions in high concentrations can result in damage to electronic components. 8.6.3.1.1 Solvent entrapment - solvents, detergents, or water may become trapped in crevices or cavities. This will interfere with additional cleaning or refinishing operations. In addition, it can prevent correct operation of the electronic equipment after the repair is complete. c. Ensure that drain and vent holes are open. d. Remove covers, doors, etc. e. Disassemble or remove from enclosures if practical and necessary for the required cleaning. f. Verify the availability of authorized cleaning materials. g. Double-check the compatibility of cleaning materials before use. h. Mask vulnerable components to prevent the entrance of water, solvents, or detergents. 8.6.3.4 Cleaning and Drying Restrictions. Some circuit components are vulnerable to damage during the cleaning process. Usually, the potential for this damage can be minimized prior to cleaning. The biggest contributing factor to this damage is water or solvent trapped by a component. Vulnerable components and techniques to minimize their vulnerabilities are shown in Table 8-6. Procedures for sealing components are as follows: 8.6.3.1.2 Over scrubbing - prolonged abrasive scrubbing can cause delamination in printed circuit boards. 8.6.3.1.3 Solvent attack - certain solvents can soften conformal coatings, wire insulation, acrylics, and some circuit components. Do not substitute solvents in the cleaning process. 8.6.3.2 When to Clean. Immediate cleaning shall occur whenever any of the following conditions exist: 8.6.3.2.1 Electronics have been exposed to adverse weather or salt-water spray. 8.6.3.2.2 Electronics have been exposed to fire-extinguishing agents. 8.6.3.2.3 Batteries have discharged electrolyte solution on or near electronic components. 8.6.3.2.4 Repair is necessary because of corrosion or component failure. 8.6.3.3 Precleaning Treatment. Accomplish the following before starting a cleaning operation: a. Disconnect any external power supply from electronics. TT-I-735, ALCOHOL, ISOPROPYL 65 a. Seal small components with SAE-AMS-T-21595, Pressure Sensitive Tape. Ensure tape and tape residue are removed using Solvent Cleaning followed by wiping with TT-I-735 Isopropyl Alcohol prior to drying the equipment. b. Seal large components in plastic bags or seal with MIL- PRF-131 Water Vapor Proof Barrier Material. Place the bag or barrier material around the component and seal with SAE-AMS-T-21595 Pressure Sensitive Tape. Ensure tape, tape residue, and bag or barrier materials are removed using Solvent Cleaning followed by wiping with TT-I-735 Isopropyl Alcohol prior to drying the component. c. In some cases the component may be removed from the equipment without too much difficulty. When this is possible, the removed component shall be cleaned separately. This method is preferred for any component that can be easily removed. b. Remove batteries. 8-27
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TO 1-1-700 TECHNICAL MANUAL CORROSI
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TO 1-1-700 TABLE OF CONTENTS Chapte
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TO 1-1-700 TABLE OF CONTENTS - CONT
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TO 1-1-700 LIST OF ILLUSTRATIONS -
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TO 1-1-700 FOREWORD 1. PURPOSE. The
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TO 1-1-700 List of Related Publicat
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TO 1-1-700 SAFETY SUMMARY 1. GENERA
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TO 1-1-700 AMS-G-6032, GREASE, PLUG
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TO 1-1-700 MIL-DTL-64159, COATING,
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TO 1-1-700 MIL-PRF-27617, GREASE, A
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TO 1-1-700 O-L-164, DRESSING, LEATH
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TO 1-1-700 MIL-T-81772, THINNER, PO
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TO 1-1-700 tronics equipment and th
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TO 1-1-700 cleaning situation, syst
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TO 1-1-700 c. Riveted joints shall
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TO 1-1-700 c. Remove and replace an
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TO 1-1-700 MIL-L-87177, LUBRICANT,
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TO 1-1-700 Figure 3-1. Simplified C
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TO 1-1-700 resistant, and also at t
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TO 1-1-700 is first noticeable as a
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TO 1-1-700 3.7.8 Oxygen Concentrati
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TO 1-1-700 Figure 3-14. Concentrati
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TO 1-1-700 Figure 3-17. Galvanic Se
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TO 1-1-700 Figure 3-20. Aluminum Su
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TO 1-1-700 3.8.7 CRES/Stainless Ste
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TO 1-1-700 3.9.10 Climate. Warm, mo
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TO 1-1-700 3.11 PREVENTATIVE MAINTE
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TO 1-1-700 CHAPTER 4 COMPOSITE AND
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TO 1-1-700 4.4.4.4 Glass parts shal
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TO 1-1-700 CHAPTER 5 PACKAGING (STO
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TO 1-1-700 extent of damage dependi
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TO 1-1-700 5.15 PRECAUTIONS FOR VCI
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TO 1-1-700 c. Secure the desiccant
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TO 1-1-700 Figure 5-8. Shock Isolat
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TO 1-1-700 Figure 5-9. Examples of
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TO 1-1-700 5.24.10 Rigid or Flexibl
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TO 1-1-700 CHAPTER 6 MOISTURE AND F
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TO 1-1-700 c. 6.2.6 Felt. Examine f
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TO 1-1-700 a. After first directing
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TO 1-1-700 6.4.5.14 Terminals, scre
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TO 1-1-700 NOTE • Authorized clea
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TO 1-1-700 Table 7-1. Cleaning of S
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TO 1-1-700 7.3.1.2.3 Portable, 45 g
Page 104 and 105: TO 1-1-700 Table 7-2. Common Milita
Page 106 and 107: TO 1-1-700 inactivity, storage, or
Page 108 and 109: TO 1-1-700 7.5.6.5.1 Grade 1 - A th
Page 110 and 111: TO 1-1-700 Table 7-4. Corrosion Pre
Page 112 and 113: TO 1-1-700 Table 7-5. Preservation
Page 114 and 115: TO 1-1-700 either case, MIL-PRF-269
Page 116 and 117: TO 1-1-700 MIL-PRF-85285, COATING,
Page 118 and 119: TO 1-1-700 c. Cadmium plated surfac
Page 120 and 121: TO 1-1-700 a. Scuff sand and feathe
Page 122 and 123: TO 1-1-700 7.7.7.2 If surface is no
Page 124 and 125: TO 1-1-700 7.7.9.2 Where only parti
Page 126 and 127: TO 1-1-700 7.8.1 Type I Application
Page 128 and 129: TO 1-1-700 Extend (Loctite) 32150 J
Page 130 and 131: TO 1-1-700 There are three ways to
Page 132 and 133: TO 1-1-700 vulnerable surfaces clea
Page 134 and 135: TO 1-1-700 Table 8-2. Materials, Th
Page 136 and 137: TO 1-1-700 Table 8-4. Electronic Cl
Page 150 and 151: TO 1-1-700 Table 8-5. Accessories o
Page 152 and 153: TO 1-1-700 Table 8-5. Accessories o
Page 156 and 157: TO 1-1-700 Table 8-7. Cleaning and
Page 158 and 159: TO 1-1-700 MIL-PRF-87937, CLEANING
Page 160 and 161: TO 1-1-700 of contamination). Maint
Page 162 and 163: TO 1-1-700 8.8.2 Protective Coating
Page 164 and 165: TO 1-1-700 • Tube clamps. • Min
Page 166 and 167: TO 1-1-700 a. For bonding/grounding
Page 168 and 169: TO 1-1-700 vertently destroy the mo
Page 170 and 171: TO 1-1-700 doors, and other corrosi
Page 173 and 174: TO 1-1-700 CHAPTER 10 CORROSION PRO
Page 175 and 176: TO 1-1-700 MIL-PRF-81733, SEALING A
Page 177 and 178: TO 1-1-700 d. After corrosion is re
Page 179 and 180: TO 1-1-700 (3) Stainless/CRES steel
Page 181 and 182: TO 1-1-700 10.9 WATER ENTRAPMENT AR
Page 183 and 184: TO 1-1-700 f. Shield equipment from
Page 185 and 186: TO 1-1-700 b. Use e-inch rivnuts of
Page 187 and 188: TO 1-1-700 10.17.3 If the plating s
Page 189: TO 1-1-700 Figure 10-16. Dissipatio
Page 192 and 193: TO 1-1-700 (2) If allowable damage
Page 194 and 195: TO 1-1-700 Table 11-1. Recommended
Page 196 and 197: TO 1-1-700 11.6 3M CO. SCOTCH-BRITE
Page 198 and 199: TO 1-1-700 11.11.2 Control of Mecha
Page 200 and 201: TO 1-1-700 11.12.2 Mechanical Damag
Page 202 and 203: TO 1-1-700 MIL-DTL-81706 (ALODINE),
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TO 1-1-700 11.13.2.3 Application of
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TO 1-1-700 only when there is no da
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TO 1-1-700 NOTE SEMCO PASA-JELL 101
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TO 1-1-700 (CRES), lead, ceramic, g
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TO 1-1-700 11.13.7.2 Treatment of C
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TO 1-1-700 MIL-A-46106, ADHESIVE/SE
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TO 1-1-700 Table 12-1. Sealing Comp
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TO 1-1-700 used to apply sealants i
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TO 1-1-700 Figure 12-2. Sealant App
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TO 1-1-700 Figure 12-4. Rivet Appli
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TO 1-1-700 Figure 12-6. Sealant Inj
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TO 1-1-700 below and adhere very po
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TO 1-1-700 Table 12-2. Time Require
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TO 1-1-700 Table 12-2. Time Require
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TO 1-1-700 of 20 to 25 seconds in a
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TO 1-1-700 d. Remove all uncured se
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TO 1-1-700 MIL-PRF-81733, SEALING A
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TO 1-1-700 MIL-PRF-81733, SEALING A
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TO 1-1-700 Figure 12-12. Typical Me
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TO 1-1-700 may be used for low temp
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TO 1-1-700 Figure 12-14. Sealing Pr
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TO 1-1-700 - Robins Air Force Base

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