TO 1-1-700 - Robins Air Force Base

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TO 1-1-700 a. Apply varnish to either totally assembled equipment or to subassemblies prior to installation in their next higher assembly; whichever will ensure that all fixed electrical connections are adequately coated. Parts which require treatment and cannot be properly coated after assembly into equipment will be coated prior to assembly. ASTM D 3955 (MIL-V-173), VARNISH, ELECTRICAL INSULATING 12 b. Apply varnish by spraying, dipping, brushing, or any combination thereof in such a manner that dried film will provide complete coverage and have a clear smooth finish free from defects such as bubbles, wrinkles, filaments, or dry spray dust. Where practicable, the thickness of dried coating shall be at least 0.002 inches (2 mils). 6.4.4 Preparing Coating Material for Application. Use these guidelines when preparing the varnish coating materials for application: ASTM D 3955 (MIL-V-173), VARNISH, ELECTRICAL INSULATING 12 a. Choose an appropriate coating material that conforms to ASTM D 3955 (MIL-V-173). A-A-3007, THINNER, PHENOLFORMALDEDYDE AND MEDIUM OIL AND STYRENATED ALKYD PAINTS AND VARNISHES 1 b. If thinning is required, thinner conforming to A-A-3007 shall be used. Mixing of the thinner with the varnish shall be per the varnish manufacturer's instructions. c. The varnish when ready for application shall contain 50 percent or more by weight of nonvolatile matter. NOTE ASTM D 3955 (MIL-V-173), Moisture and Fungus Resistant Varnish, and A-A-3007, Thinner, are both available through the Air Force supply system. A-A- 3007, Thinner, can be procured in a 1 quart can under NSN 8010-00-441-5938 and a 1 gallon can under NSN 8010-00-441-5940. ASTM D 3955 (MIL-V- 173), Moisture and Fungus Resistant Varnish, can be procured in a 16 oz. aerosol can under NSN 5970-00- 832-6950, a 1 quart can under NSN 8010-00-180- 6343, and a 1 gallon can under NSN 5970-00-285- 0271. 6.4.5 Coverage. Apply coating material thoroughly and completely over all surfaces, circuit elements, resistors, capacitors, coils, etc., all surfaces supporting circuit elements, interconnecting wiring and connections unless such application will interfere with operating performance of equipment. The following are examples of parts which normally require treatment in complete assembly; however, the part need not be treated if specifically exempted by applicable repair standard, if marked as required by paragraph 6.4.9 or if exempted under paragraph 6.4.6. 6.4.5.1 Cables, cordage, braid-covered cables, cable forms, lacing cord, wire, etc., (i.e., those inside equipment and not normally fixed in operation). 6.4.5.2 Capacitors, fixed under 600-volts operating, must be treated after assembly. 6.4.5.3 Chassis, bottom, and top, unless finished in accordance with requirements of Chapter 7. 6.4.5.4 Chokes. 6.4.5.5 Coils. 6.4.5.6 Metals, joints between dissimilar metals and unvarnished or unpainted metallic surfaces, including shield cans, cases, and covers, unless finished in accordance with requirements of REP-1007. 6.4.5.7 Paper labels and decalcomanias. 6.4.5.8 Pile-up portions of jacks, relays, switches, etc. 6.4.5.9 Resistors, fixed, except hermetical types, all others must be treated after assembly. 6.4.5.10 Tube sockets, except contacts. 6.4.5.11 Soldered joints, including adjacent wire insulation and terminal boards. 6.4.5.12 Toggle switches. 6.4.5.13 Terminal boards. 6-6 Change 1
TO 1-1-700 6.4.5.14 Terminals, screw lugs, and soldered connections, after making connections. 6.4.6 Exemptions. 6.4.6.1 The following parts need not be coated, however, no precaution need be taken to prevent coverage, except that dripping thereon shall be prevented. 6.4.6.1.1 Cable wire, braids, and jackets whose outside surface is of rubber, synthetic rubber, or Vinylite type composition, not flexed in normal operation. 6.4.6.1.2 Materials such as nylon, cellulose-acetate rayon glass, natural or synthetic rubber; this is not applicable to cable and wire. 6.4.6.1.3 Painted, lacquered, varnished, or surface treated metal such as chromated zinc or cadmium and anodized aluminum, interior surfaces. 6.4.6.1.4 Parts made of or plated with chromium, gold, nickel, rhodium, or stainless steel. 6.4.6.1.5 Shields for coils, electron tubes, transformers, etc., and interior surfaces of the shields. 6.4.6.1.6 Small surfaces which were covered to affect required masking; this is not applicable to solder joints. 6.4.6.1.7 Tubes, electron, and avoid direct application to envelopes. 6.4.6.2 The following parts and materials shall not be treated in accordance with this process except as specified herein, but shall be obtained with an approved fungicidal treatment or be given a fungicidal treatment in accordance with other processes. 6.4.6.2.1 Cables, cordage, cords, braided cable, etc., which are flexed in normal operation. 6.4.6.2.2 Instruments, electrical, indicating, treat soldered connections only during repair operations of the meter. 6.4.6.2.3 Lacing cord, but no precaution need be taken to prevent overall spray. 6.4.6.2.4 Materials such as canvas, duck, cork, felt, wool or hair fiber, leather, rope, wood, etc. 6.4.6.2.5 Wave guides. NOTE Rotating equipment, such as dynamotors, generators, motors, power units, and engines, will be impregnated with a varnish conforming to Grade CB of MIL-I- 24092. 6.4.7 Final Drying of Coated Materials. 6.4.7.1 Prior to packaging, coating shall be dried hard on metal surfaces and on other surfaces, coating shall not be tacky. 6.4.7.2 Coated assemblies shall be force-dried at a temperature not exceeding 60 °C (140 °F). Care shall be taken to ensure sufficient drying to prevent presence of solvent vapors in any enclosure. 6.4.7.3 Force drying shall be accomplished for a minimum period of 1/2 hour and not exceeding 3 hours. 6.4.8 Adjusting and Final Testing. (After 24 hours of air drying.) After treatment, the equipment or individual assembly shall be adjusted and aligned for optimum operating characteristics and, wherever film is broken during alignment. Breaks will be retouched. 6.4.9 Marking of Treated Equipment. Each unit of equipment which has been treated and each treated plug-in assembly as well as all cases and containers in which they are packed for shipment, will bear a permanent and legible marking reading MFP. Where any equipment is composed of major components or assemblies each of these may be individually marked. 6.4.10 Determination of Coverage. 6.4.10.1 Coverage will be inspected for compliance with requirements of this process. 6.4.10.2 In general, coating will present a glossy appearance when viewed under ordinary light. 6.4.10.3 Since varnish coating material is inherently fluorescent, inspection of treated equipment will be made under an ultraviolet light. 6.4.10.4 The extent of coverage will be determined by appearance of fluorescence. 6-7/(6-8 blank)
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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
Page 36 and 37: TO 1-1-700 c. Riveted joints shall
Page 38 and 39: TO 1-1-700 c. Remove and replace an
Page 40 and 41: TO 1-1-700 MIL-L-87177, LUBRICANT,
Page 42 and 43: TO 1-1-700 Figure 3-1. Simplified C
Page 44 and 45: TO 1-1-700 resistant, and also at t
Page 46 and 47: TO 1-1-700 is first noticeable as a
Page 48 and 49: TO 1-1-700 3.7.8 Oxygen Concentrati
Page 50 and 51: TO 1-1-700 Figure 3-14. Concentrati
Page 52 and 53: TO 1-1-700 Figure 3-17. Galvanic Se
Page 54 and 55: TO 1-1-700 Figure 3-20. Aluminum Su
Page 56 and 57: TO 1-1-700 3.8.7 CRES/Stainless Ste
Page 58 and 59: TO 1-1-700 3.9.10 Climate. Warm, mo
Page 60 and 61: TO 1-1-700 3.11 PREVENTATIVE MAINTE
Page 63 and 64: TO 1-1-700 CHAPTER 4 COMPOSITE AND
Page 65 and 66: TO 1-1-700 4.4.4.4 Glass parts shal
Page 67 and 68: TO 1-1-700 CHAPTER 5 PACKAGING (STO
Page 69 and 70: TO 1-1-700 extent of damage dependi
Page 71 and 72: TO 1-1-700 5.15 PRECAUTIONS FOR VCI
Page 73 and 74: TO 1-1-700 c. Secure the desiccant
Page 75 and 76: TO 1-1-700 Figure 5-8. Shock Isolat
Page 77 and 78: TO 1-1-700 Figure 5-9. Examples of
Page 79 and 80: TO 1-1-700 5.24.10 Rigid or Flexibl
Page 81 and 82: TO 1-1-700 CHAPTER 6 MOISTURE AND F
Page 83 and 84: TO 1-1-700 c. 6.2.6 Felt. Examine f
Page 85: TO 1-1-700 a. After first directing
Page 90 and 91: TO 1-1-700 NOTE • Authorized clea
Page 92 and 93: TO 1-1-700 Table 7-1. Cleaning of S
Page 102 and 103: 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
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TO 1-1-700 Table 8-4. Electronic Cl
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TO 1-1-700 Table 8-5. Accessories o
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TO 1-1-700 Table 8-5. Accessories o
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TO 1-1-700 f. Devices with permanen
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TO 1-1-700 Table 8-7. Cleaning and
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TO 1-1-700 MIL-PRF-87937, CLEANING
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TO 1-1-700 of contamination). Maint
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TO 1-1-700 8.8.2 Protective Coating
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TO 1-1-700 • Tube clamps. • Min
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TO 1-1-700 a. For bonding/grounding
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TO 1-1-700 vertently destroy the mo
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TO 1-1-700 doors, and other corrosi
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TO 1-1-700 CHAPTER 10 CORROSION PRO
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TO 1-1-700 MIL-PRF-81733, SEALING A
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TO 1-1-700 d. After corrosion is re
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TO 1-1-700 (3) Stainless/CRES steel
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TO 1-1-700 10.9 WATER ENTRAPMENT AR
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TO 1-1-700 f. Shield equipment from
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TO 1-1-700 b. Use e-inch rivnuts of
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TO 1-1-700 10.17.3 If the plating s
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TO 1-1-700 Figure 10-16. Dissipatio
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TO 1-1-700 (2) If allowable damage
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TO 1-1-700 Table 11-1. Recommended
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TO 1-1-700 11.6 3M CO. SCOTCH-BRITE
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TO 1-1-700 11.11.2 Control of Mecha
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TO 1-1-700 11.12.2 Mechanical Damag
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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 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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