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1、TM 11-2651 D E P A R T M E N T O F T H E A R M Y T E C H N I C A L M A N U A L ANTENNA GROUPS AN/GRA-4 AND AN/GRA-12 This copy is a reprint which includes current pages from Changes 1 through 3 WARNING DANGEROUS VOLTAGES EXIST ON THE ANTENNA WHEN IN OPERATION Before working on any part of the antenn
2、a, be certain that all power has been turned off. DONT TAKE CHANCES! TM 11-2651 TO 31R2-2GRA-101 *C 1 DEPARTMENT OF THE ARMY TECHNICAL MANUAL DEPARTMENT OF THE AIR FORCE TECHNICAL ORDER ANTENNA GROUPS AN/GRA-4 AND AN/GRA-12 TECHNICAL MANUALDEPARTMENTS OF THE ARMY No. 11-2651AND THE AIR FORCE TECHNIC
3、AL ORDER No. 31R2-2GRA-101WASHINGTON 25, D.C., 19 April 1961 TM 11-2651, 1 November 1956, is changed as follows: Page 3. Add the following to paragraph 2c: (3) Comments or suggestions. Any comments concerning omissions and discrepancies in appendix I and II will be prepared on DA Form 2028 and forwa
4、rded direct to Commanding Officer, U.S. Army Signal Materiel Support Agency. ATTN: SIGMS-ML, Fort Monmouth, N.J. Page 58. Add the following appendixes: APPENDIX I MAINTENANCE ALLOCATION CHART FOR ANTENNA GROUP AN/GRA-4 Section I. INTRODUCTION 1. General a.This section assigns maintenance functions a
5、nd repair operations to be performed by the lowest appropriate maintenance echelon. b.The columns are as follows: (1)Part or component. This column shows only the nomenclature or standard item name. Additional descriptive data is included only where clarification is necessary to identify the part. C
6、omponents and parts comprising a major end item are listed alphabetically. Assemblies and subassemblies are in alphabetical sequence with their components listed alphabetically immediately below the assembly listing. *The changes supersede so much of Department of the Army supply manual SIG 7 nonexp
7、endable items are indicated by NX. (7)Quantity authorized. Under Items Comprising an Operable Equipment, the column lists the quantity of items supplied for the initial operation of the equipment. (8)Illustration. Not used. 2. References Additional instructions concerning maintenance of this equipme
8、nt are contained in TM 11-5895-229-12P, (Operator and Organizational Maintenance Repair Parts and Special Tool Lists and Maintenance Allocation Chart: Mast AB-86/GRA-4. 6 Section II. FUNCTIONAL PARTS LIST Federal stock No.DescriptionUnit ofExpand-Quan- issueabilitytity author ized (2)(4)(5)(6)(7) IT
9、EMS COMPRISING AN OPERABLE EQUIPMENT ANTENNA GROUP AN/GRA-4 5820-244-5147ANTENNA GROUP AN/GRA-4: pro-eaNX vides several ant types for freq of 1.5 to 18.0 mc; J and H Smith part/dwg No. 100. Ord thru AGCTECHNICAL MANUAL: TM 11-2651eaX2 5820-264-7506ANTENNA AS-244/GRA-4: 1.5 to 18.0eaNX1 mc freq range
10、; wire construction, for receiver and transmitter signals. ANTENNA AS-244/GRA-4 5820-497-9628BAG, BG-102, BG-102A, C eaX1 5995-247-9759CORD CG-357/U: (50 ft 6 in) uses RG- eaX6 59A/U cable; SigC dwg No. SC-D- 34932. 5970-405-8223INSULATOR IL-4/GRA-4: with RF eaX1 Receptacle UG-58/U. 6240-223-9100LAM
11、P, GLOW: 105-120 V, 1/25 w, 0.003 eaX1 amp; miniature bayonet base, 1/8 in. max o/a, h; GE type No. NE-51. 5985-497-8765REEL RL-122/GRA-4 eaNX2 5985-228-8064SLING, HOISTING: Halyard MX-516/ eaX1 GR-A. 5210-265-7451 TAPE, MEASURING: 100 ft Ig ex- ea NX1 tended; Justus Roe Model No. 400-A1. 5120-408-1
12、701 TOOL, ALINEMENT: approx. 5/32 in. x eaX1 1/32 in. thk sedr nib in one end, 6 in. lg x 7/32 in. dia; Amer Rad Hdwe No. 860. 5985-355-8024 TUNER, ANTENNA: Antenna Tuner eaX1 TN-174/GRA-4. 5985-257-2927 MAST AB-86/GRA-4: sectionalized eaNX1 construction; J and H Smith part No. 100-B. RUNNING SPARES
13、 AND ACCESSORY ITEMS ANTENNA GROUP AN/GRA-4 NO PARTS AUTHORIZED FOR STOCKAGE AT FIRST ECHELON 7 By Order of the Secretaries of the Army and the Air Force: G. H. DECKER, General, United States Army, Official:Chief of Staff. R. V. LEE, Major General, United States Army, The Adjutant General. CURTIS E.
14、 LeMAY, Official:Chief of Staff, United States Air Force. R. J. PUGH, Colonel, United States Air Force, Director of Administrative Service. 8 Distribution: Active Army: To be distributed in accordance with DA Form 12-7 requirements for TM 11-series (Unclas) plus the following: USASA (2)11-16 CNGB (1
15、)11-55 Tech Stf, DA (1) except11-57 CsigO (18)11-96 DASA (5)11-97 ARADCOM (2)11-98 ARADCOM Rgn (2)11-117 MDW (2)11-500 (AA-AE, RA-RT) (4) Seventh USA (2)11-555 EUSA (2)11-557 Corps (2)11-587 Div (2)11-592 Units organized under following11-597 TOEs (2 copies to each17-51 unless otherwise indicated):2
16、9-56 1-730-15 1-1730-22 1-3730-500 (AA-AK) 1-6732-57 1-10739-61 5-1544-35 5-1644-36 5-1744-235 5-23744-236 5-27844-237 7-5244-435 8-7644-436 8-7844-437 8-13744-445 9-4744-446 9-6544-447 9-7544-448 9-8744-535 9-11744-536 9-22744-537 9-500 (AA-AC)44-544 9-510 (AA-AC)44-545 10-2244-546 10-20244-547 10-
17、20644-548 10-37755-11 10-44555-12 10-44855-16 10-53655-56 11-555-57 11-755-116 NG: None. USAR: None. For explanation of abbreviation used, see AR 320-50. 9 Changes now in force: C 1, C 2 TM 11-2651 C2 ANTENNA GROUPS AN/GRA-4 AND AN/GRA-12 CHANGEHEADQUARTERS DEPARTMENT OF THE ARMY No. 2WASHINGTON D.
18、C., 16 October 1963 TM 11-2651, 1 November 1966, is changed as follows: Note. The parenthetical references to a previous change (example page 1 of C1) indicates that pertinent material was published in that change. Page 3. Delete paragraph 1 and substitute: 1. Scope This manual describes Antenna Gro
19、ups AN/GRA- and AN/ GRA-12 and covers their installation, operation, theory, operators maintenance, and second echelon maintenance. It also includes instructions for performing preventive and periodic maintenance services and repair functions to be accomplished by the organizational repairman. Add p
20、aragraph 1.1 after paragraph 1. 1.1. Index of Publications Refer to the latest issue of DA Pam 310-4 to determine whether there are new editions, changes, or additional publications pertaining to the equipment. DA Pam 310-4 is an index of current technical manuals, technical bulletins, supply bullet
21、ins, lubrication orders, and modification work orders available through publications supply channels. The index lists the individual parts (-10, -20, -35P, etc.) and the latest changes to and revisions of each equipment publication. Delete paragraph 2 (page 1 of C1) and substitute: 2. Forms and Reco
22、rds a.Reports of Maintenance and Unsatisfactory Equipment. Use equipment forms and records in accordance with instructions in TM 38-750. b.Report of Damaged or Improper Shipment. Fill out and forward DD Form 6 (Report of Damaged or Improper Shipment) s prescribed in AR 700-58 (Army), NAVSANDA Public
23、ation 378 (Navy), and AFR 71-4 (Air Force). TAGO 6513B 1 c.Reporting of Equipment Manual Improvements. The direct reporting by the individual user of errors, omissions, and recommendations for improving this manual is authorized and encouraged. DA Form 2028 (Recommended changes to DA technical manua
24、l parts lists or supply manual 7, 8, or 9) will be used for reporting these improvements. This form will be completed in triplicate using pencil, pen, or typewriter. The original and one copy will be forwarded direct to: Commanding Officer, U.S. Army Electronics Materiel Support Agency, ATTN: SELMS-
25、MP, Fort Monmouth, New Jersey 07703. One information copy will be furnished to the individuals immediate supervisor (e.g., officer, noncommissioned officer, supervisor, etc.). Page 5, paragraph 5b: Delete note 2 and substitute: 2. This listing is based on the original shipment by the contractor. For
26、 the current official listing of components of individual models, see the basic issue items list (app. III). Page 23. Delete paragraph 14d and substitute: d.Checking Unpacked Equipment. (1)Inspect the equipment for damage incurred during shipment. If the equipment has been damaged, report the damage
27、 on DD Form 6 (par. 2). (2)Check the equipment against the master packing list. When no packing list accompanies the equipment, check the equipment against the table of components in paragraph 5. Report all discrepancies in accordance with instructions in TM 38-750 (par. 2). Note Shortage of a minor
28、 assembly or part that does not effect proper functioning of the equipment should not prevent use of the equipment. (3)If the equipment has been used or reconditioned, see whether it has been changed by a Modification Work Order (MWO). The current MWOs applicable to the equipment are listed in DA Pa
29、m 310-4 (par. 1.1). Page 27. Make the following changes: Paragraph 16f. Add subparagraph g after subparagraph f. g.After the mast has been raised, bring the guys to the correct tension. Tension must be applied at a uniform rate to prevent twisting the mast. To adjust guy tension, tighten two guys si
30、multaneously, first on one side of the mast and then on the other side of the mast. Increase the tension gradually and evenly until the guys are brought under proper tension. AGO 6513B 2 Page 40, chapter 3. Heading. Change the chapter heading to read: CHAPTER 3 MAINTENANCE INSTRUCTIONS Delete the no
31、te immediately after the chapter heading. Delete paragraphs 21 through 24 and substitute: 21. Scope of Maintenance The maintenance duties assigned to the operator of the equipment are listed below together with a reference to the paragraphs covering the specific maintenance functions. These procedur
32、es do not require special tools or test equipment. a.Daily preventive maintenance checks and services (par. 24). b.Cleaning (par. 24.1). c.Replacement of defective pilot lamp (par. 30). 22. Preventive Maintenance Preventive maintenance is the systematic care, servicing, and inspection of equipment t
33、o prevent the occurrence of trouble, to reduce downtime, and to assure that the equipment is serviceable. a.Systematic Care. The procedures given in paragraphs 24 and 24.1 cover routine systematic care and cleaning essential to proper upkeep and operation of the equipment. b.Preventive Maintenance C
34、hecks and Services. The preventive maintenance checks and services chart (par. 24.1) outlines functions to be performed at specific intervals. These checks and services are to maintain Army electronic equipment in a combat serviceable condition; that is, in good general (physical) condition and in g
35、ood operating condition. To assist operators in maintaining combat serviceability, the chart indicates what to check, how to check, and what the normal conditions are; the References column lists the illustrations, paragraphs, or manuals that contain supplementary information. If the defect cannot b
36、e remedied by the operator, higher echelon maintenance or repair is required. Records and reports of these checks and services must be made in accordance with the requirements set forth in TM 38-750. 23. Preventive Maintenance Checks and Services Periods Preventive maintenance checks and services of
37、 the equipment are required daily. Paragraph 24 specifies the checks and services that must be accomplished daily and under the conditions listed below. AGO 6513 3 a.When the equipment is initially installed. b.When the equipment is reinstalled after removal for any reason. c.At east once each week
38、if the equipment is maintained in standby condition. 24. Daily Preventive Maintenance Checks and Services Chart Sequence No.ItemProcedureReference 1Connections Check to be sure that all cable con- Fig. 17 nections are secure and properlythrough tightened.22 and 24 2Cables Check to be sure that all c
39、ables Fig. 24. show no evidence of damage or deformity. Inspect the cable for cuts, kinks, or damaged insula- tion. 3TN-174/GRA-4 Warning: Do not make any replace- Fig. 23. ments or adjustment on the equipment with power on. Adjust the tuning control and ob- serve that the neon bulb glows with varyi
40、ng intensity. Replace a defective neon bulb. Add paragraph 24.1 after paragraph 24: 24.1. Cleaning Inspect the exterior of the equipment. The exterior surfaces should be clean, and free of dust, dirt, grease, and fungus. a. Remove dust and loose dirt with a clean soft cloth. Warning: Cleaning compou
41、nd is flammable and its fumes are toxic. Provide adequate ventilation. Do not use near a flame. b. Remove grease, fungus, and ground-in dirt from the mast assembly of the AN/FRA4 and AN/FRA-12; use a cloth dampened (not wet) with cleaning compound (Federal stock No. 7930-395-9542). Page 41. Delete f
42、igure 27. Page 42. section II. Heading. Change the section heading to read: Section II. ORGANIZATIONAL MAINTENANCE AGO 6513B 4 Delete paragraphs 25 through 28 and substitute: 25. Scope of Organizational Maintenance a.This section contains instructions covering second echelon maintenance of the equip
43、ment. It includes instructions for performing preventive and periodic maintenance services and repair functions to be accomplished by the organizational repairman. b.Second echelon maintenance of the equipment includes: (1)Preventive maintenance (par. 28 and 28.1). (2)Touchup painting instructions (
44、par. 28.2). (3)Troubleshooting (par. 29). (4)Replacement of parts (par. 30). 26. Tools, Materials, and Test Equipment Required The tools and test equipment required for operational maintenance are listed in the maintenance allocation chart (app. I). The materials required are as follows: a.Cleaning
45、Compound (Federal stock No. 7930-39-9542). b.Cleaning cloth. 27. Organizational Preventive Maintenance a.Preventive maintenance is the systematic care, inspection, and servicing of equipment to maintain it in serviceable condition, prevent breakdowns, and assure maximum operational capability. Preve
46、ntive maintenance is the responsibility of all echelons concerned with the equipment and includes the inspection, testing, and repair or replacement of parts, subassemblies, or units that inspection and tests indicate would probably fail before the next scheduled periodic service. Preventive mainten
47、ance checks and services of the equipment at the second echelon level are made at monthly and quarterly intervals unless otherwise directed by the commanding officer. b.Maintenance forms and records to be used and maintained on this equipment are specified in TM 38-750. 28. Monthly Maintenance Perfo
48、rm the maintenance functions indicated in the monthly preventive maintenance checks and services chart (par. 28.1). A month is defined as approximately 30 calendar days or 8-hour-perday operation. If the equipment is operated 16 hours a day, the monthly preventive maintenance checks and services sho
49、uld be performed at 15-day intervals. Adjustment of the maintenance interval must be made to compensate for any unusual operating conditions. Equipment maintained in a standby (ready for immediate operation) condition must have monthly preventive maintenance checks and services performed on it. Equipment in limited storage (requires service before operation) does not require monthly preventive maintenance. AGO 6513B 5 Add paragraphs 28.1 and 28.2 after paragraph 28: 28.1. Monthly Preventive Maintenance Checks and Services Chart Sequence No.ItemProcedureReference 1PublicationsC
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