AB-577_mast_user_TM11-5820-538-12_1967.pdf

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1、TM 11-5820-538-12 D E P A R T M E N T OF THE A R M Y T E C H N I C A L M A N U A L OPERATOR AND ORGANIZATIONAL MAINTENANCE MANUAL INCLUDING REPAIR PARTS LIST MAST AB-577/GRC AND EXTENSION KIT, MAST MK-806/GRC I This copy is a reprint which includes current pages from Changes l through 3. HEADQUARTER

2、S, DEPARTMENT OF JUNE 196 7 THE ARMY WARNING PERSONNEL USING THIS EQUIPMENT SHOULD BE FAMILIAR WITH THE REQUIREMENTS OF TB SIG 291 BEFORE ATTEMPTING INSTALLATION AND DISASSEMBLY OF THE EQUIPMENT COVERED IN THIS MANUAL. FAILURE TO FOLLOW THE REQUIREMENTS OF TB SIG 291 COULD RESULT IN INJURY OR DEATH.

3、 TM 11-5820-538-12 C3 Change No. 3 HEADQUARTERS DEPARTMENT OF THE ARMY WASHINGTON, DC, 21 November 1983 Operator and Organizational Maintenance Manual MAST AB-577/GRC (NSN 5820-00-892-3862) AND EXTENSION KIT, MAST MK-806/GRC (NSN 5985-00-691-2344) Current as of February 1983 TM 11-5820-538-12,13 Jun

4、e 1967, is changed as follows: 1. New or revised material is indicated by a vertical bar in the margin. Where an entire chapter, section, or illustration is added or revised, the vertical bar is placed opposite the identification number and title. 2. Remove and insert pages as indicated below: Inser

5、t A, B and C 1-1 and 1-2 1-5 and 1-6 2-1 and 2-2 2-9 and 2-10 2-15 and 2-16 2-19 and 2-20 Figure 2-18 (foldout) 3-1 and 3-2 A-1/(A-2 blank) B-3 through B-5/(B-6 blank) Remove None 1-1 and 1-2 1-5 and 1-6 2-1 and 2-2 2-9 and 2-10 2-15 and 2-16 2-19 and 2-20 Figure 2-18 3-1 and 3-2 A-1 B-3 through B-5

6、 3. File this change sheet in front of the publication. By Order of the Secretary of the Army: Official: JOHN A. WICKHAM JR. General, United States Army Chief of Staff ROBERT M. JOYCE Major General, United States Army The Adjutant General Distribution: To be distributed in accordance with DA form 12

7、-51, Operator Maintenance requirements for AB-577/GRC. By Order of the Secretary of the Army: JOHN A. WICKHAM JR. General, United States Army Official: Chief of Staff ROBERT M. JOYCE Major General. United States Army The Adjutant General DISTRIBUTION: To be distributed in accordance with DA Form 12-

8、51.Operator Maintance rqrs for A and TM 11-5820-461-20, 22 June 1962, including C 1, 28 March 1963. Change 2 i TM 11-5820-538-12 Page APPENDIX A. REFERENCES A-l B. MAINTENANCE ALLOCATION B-1 C. DELETED Change 2 T M 11-582O-5M-12 Figure 1-i. Afcwt AB-577/GRC, supporting Antenna AT-903/G. iv T M 11-58

9、20-538-12 FIXED OPERATION WITH LONG RANGE ANTENNAS WARNING TELESCOPING ANTENNA MAST TYPICAL TOWER EXTENDED RANGE DOUBLET ANTENNA ANTENNA NEVER ERECT THESE LONG RANGE ANTENNAS DIRECTLY UNDER POWERUNES. IF YOU MUST ERECT THESE LONG RANGE ANTENNAS NEAR POWERLINES. POWERLINE POLES OR TOWERS, OR BUILDING

10、S WITH OVERHEAD POWERLINE CONNECTIONS, NEVER PUT THE ANTENNA CLOSER THAN TWO TIMES THE ANTENNA HEIGHT FROM THE BASE OF TuE POWERLINE, POLE, TOWER OR BUILDINGS. NEVER ATTEMPT TO ERECT ANY LONG RANGE ANTENNA WITHOUT A FULL TEAM. BEFORE ERECTING ANY LONG RANGE ANTENNA, INSPECT ALL THE PARTS MAKING UP T

11、HE ANTENNA KIT. DO NOT ERECT THE ANTENNA IF ANY PARTS ARE MISSING OR DAMAGED. DO AS MUCH OF THE ASSEMBLY WORK AS POSSIBLE ON THE GROUND. WHEN ERECTING THE ANTENNA, ALLOW ONLY TEAM PERSONNEL IN THE ERECTION AREA. MAKE SURE THAT THE AREA FOR THE ANCHORS IS FIRM. IF THE GROUND IS MARSHY OR SANDY, GET S

12、PECIFIC INSTRUCTIONS FROM YOUR CREW CHIEF OR SUPERVISOR ON HOW TO REINFORCE THE ANCHORS. WHEN SELECTING LOCATIONS FOR ANCHORS, AVOID TRAVELED AREAS AND ROADS. IF YOU CANNOT AVOID THESE AREAS, GET SPECIFIC INSTRUCTIONS FROM YOUR SUPERVISOR AS TO WHAT CLEAR- ANCE YOUR GUY WIRES AND ROPES MUST HAVE OVE

13、R THE TRAVELED AREAS AND ROAD. CLEARLY MARK ALL GUY WIRES AND ROPES WITH THE WARNING FLAGS OR SIGNS SUPPLIED BY YOUR UNIT. IN AN EMERGENCY, USE STRIPS OF WHITE CLOTH AS WARNING STREAMERS. IF YOU SUSPECT THAT POWERLINES HAVE MADE ACCIDENTAL CONTACT WITH YOUR ANTENNA, STOP OPERATING, ROPE OFF THE ANTE

14、NNA AREA, AND NOTIFY YOUR SUPERIORS. IF THE WEATHER IN YOUR AREA CAN CAUSE ICE TO FORM ON YOUR LONG RANGE ANTENNA AND ITS GUY WIRES AND ROPES, ADD EXTRA GUYS TO SUPPORT THE SYSTEM. ROPE OFF THE AREA AND POST IT WITH WARNING SIGNS LIKE M BEWARE OF FALLING ICE* DO NOT TRY TO ERECT ANY ANTENNA DURING A

15、N ELECTRICAL STORM. KEEP A SHARP EYE ON YOUR ANCHORS AND GUYS. CHECK THEM DAILY AND IMMEDIATELY BEFORE AND AFTER BAD WEATHER. Change 3 A T M 11-5820-538-12 SAFETY STEPS TO FOLLOW IF SOMEONE IS THE VICTIM OF ELECTRICAL SHOCK DO NOT TRY TO PULL OR GRAB THE INDIVIDUAL IF POSSIBLE , TURN OFF THE ELECTRI

16、CAL POWER IF YOU CANNOT TURN OFF THE ELECTRICAL POWER, PULL, PUSH, OR LIFT THE PERSON TO SAFETY USING A WOODEN POLE OR A ROPE OR SOME OTHER INSULATING MATERIAL SEND FOR HELP AS SOON AS POSSIBLE AFTER THE INJURED PERSON IS FREE OF CONTACT WITH THE SOURCE OF ELECTRICAL SHOCK, MOVE THE PERSON A SHORT D

17、ISTANCE AWAY AND IMMEDIATELY START ARTIFICIAL RESUSCITATION B Change 3 TM 11-5820-538-12 C3 WARNING Adequate ventilation should be provided while using TRICHLOROTRIFLUOROETHANE. Prolonged breathing of vapor should be avoided. The solvent should not be used near heat or open flame, the products of de

18、com- position are toxic and irritating. Since TRICHLOROTRIFLUOROETHANE dissolves natural oils, prolonged contact with skin should be avoided. When necessary use gloves which the solvent cannot penetrate. If the solvent is taken internally, consult a physician. Change 3 TM 11-5820-538-12 C3 CHAPTER 1

19、 INTRODUCTION Section I. GENERAL 1-1. Scope This manual describes Mast AB-577/GRC and Extension Kit, Mast MK-806/GRC and covers their installation and organizational maintenance. It includes instructions for cleaning and inspecting the equipment and lists the parts available to the organizational ca

20、tegory of maintenance. 1-2. Consolidated Index of Army Publications and Blank Forms Refer to the latest Issue of DA Pam 310-1 to determine whether there are new editions, changes or additional publications pertaining to the equipment. 1-3. Maintenance Forms, Records, and Reports a. Reports of Mainte

21、nance and Unsatisfactory Equip- ment Department of the Army forms and procedures used for equipment maintenance will be those prescribed by TM 38-750. The Army Maintenance Management System (TAMMS). b. Report of Packaging and Handling Deficiencies. Fill out and forward SF 364 (Report of Discrepancy

22、(ROD) as prescribed in AR 735-11-2/DLAR 4140.55/NAVMATINST 4355.73A/AFR 400-54/MCO 4430.3F. c. Discrepancy in Shipment Report (DISREP) (SF 361). Fill out and forward Discrepancy in Shipment Report (DISREP) (SF 361) as prescribed in AR 55-38/NAVSUPINST 4610.33C/AFR 75-18/MCO P4610.19D/DLAR 4500.15. 1

23、4. Reporting Errors and Recommending Improvements You can help improve this manual. If you find any mistakes or if you know of a way to improve the procedures, please let us know. Mail your letter or DA Form 2028 (Recommended Changes to Publications and Blank Forms) direct to: Commander, US Army Com

24、mu- nications-Electronics Command and Fort Monmouth, ATTN: DRSEL-ME-MP, Fort Monmouth, New Jersey 07703. In either case, a reply will be furnished direct to you. 1-4.1 Reporting of Equipment Improvement Recom- mendations (EIR) If your AB-577/GRC and/or MK-806/GRC needs improve- ment, let us know. Se

25、nd us an EIR. You, the user, are the only one who can tell us what you dont like about your equipment. Let us know why you dont like the design. Put it on an SF 368 (Quality Deficiency Report). Mail it to Commander, US Army Communications-Electronics Command and Fort Monmouth, ATTN: DRSEL-ME-MP, For

26、t Monmouth, New Jersey 07703. Well send you a reply. Section II. DESCRIPTION AND DATA 1-5. Purpose and Use a. Mast AB-577/GRC (fig. 1-1) is an eight-section antenna support that can be extended as high as 48 feet (14.63 meters) above the ground. Extension Kit, Mast MK806/ GRC is a five-section mast

27、kit that is mounted on top of the AB-577/GRC to produce a total height of 75 feet (22.86 meters). WARNING: The use of more than one 25-foot mast extension kit. (MK-806/GRC) on the Antenna Mast AB-577/GRC is hazardous and is not authorized. b. In some applications, the AB-577/GRC supports Antenna AT-

28、903/G, a born-type directional antenna. The AB-577/GRC (and the MK-806/GRC) may be used to support two AT-903/Ks when they are mounted on Support Antenna AB-720/G (fig. 1-2), which is part of Radio Set Group AN/TRA-24A (for F-band operation of Radio Set AN/TRC-24), and Radio Set Group 0A-3668/A/ TRC

29、-24 (for J-band operation of the AN/TRC-24). Refer to TM 11-5820-287-12 and TM 11-5820-287-34 for additional information on the AN/TRC-24 series of radio sets. Change 31-1 TM 11-5820-538-12 c. The AB-577/GRC may also be used to support two AB-903/Gs when they are mounted on Support, Antenna AB-957/G

30、RC fig. 1-3). The AB-957/GRC is similar to the AB-720/G; how- ever, one of the antennas mounted on it can be rotated after the mast is erected, for more accurate positioning. Rotation is done on the ground, using two guys to pull the movable antenna into the desired direction. The guys are then tied

31、 down to prevent further turning of the antenna. The AB-957/GRC is normally a part of Army Area Communications Systems as- semblages. d. The AB-720/GRC and the AB-957/GRC are commonly referred to as T-bars. 1-6. Technical Characteristics a. AB-577/GRC. Type Sectionalized, tubular. Material Aluminum.

32、 Height: Maximum expanded 48 feet (14.63 meters). Collapsed (launcher 95 inches (2.41 meters). height). Each mast section . 5 feet (1.52 meters). Guy rope lengths 39 ft, 47 ft, and 56 ft (11.88, 14.32, and 17.07 meters, repsec- tively). Stability 5 percent of original set- ting for winds up to 75 TO

33、* 0UY mm ASSEMBLY Figure 1-2. Support, Antenna AB-720IG in use. 1-2 Change 2 TM 11-5820-538-12 CENTER BAR ANTENNA MOUNT A. PREPARED FOR SHIPMENT. ANTENNA MOUNT (FIXED IN POSITION BY LOCK PIN) ANTENNA MOUNT (FREE ROTATING, USE SIUCONE GREASE IN HORN HOLDER TO FACILITATE ROTATION) LOCK PIN (TO HOLD AN

34、TENNA MOUNT IN POSITION) ANTENNA HOLDERS LOCK PIN HOLE LOCK PIN (TO HOLD ANTENNA ADAPTER OF AB-577/GRC) HORIZONTAL BAR U-ROD CENTER BAR LOCK PIN RETAINING BALL (2) PULL RING B. PARTS LOCATION. TM 582053S-l9-3 Figure IS. Support, Antenna AB-957/GRC. miles per hour (65.13 knots; 120.67 kilometers per

35、hour), under condi- tions of % inch (1.27 centimeters) ice loading. Rotation Azimuth rotation, 360; controlled from ground. b. MK-806/GRC. Type Sectionalized, tubular. Material Aluminum 1-3 TM STAKE SLEDGE HAMMER DIGGING BAR Mwwrr SECTION flw mtm (TOPI y#s SM-C-423587 1 5820-00-973-0200 Anchor, guy

36、(screw anchor): 80063; SC-B-423652 . 3 4O3O-OO-58O-7833 Roll, tools and accessories (stake roll): 80063; SM-D-423619 1 5140-00-973-0491 Bag, cotton duck: 80063; SM-C-423628 : 1 5820-00-973-0349 Bar, digging: 80063; SM-B-423624 1 5120-00-892-4713 Bar, claw (mast coupler tool): 80063; SM-423604 (fig.

37、4-1) 1 5820-00-973-0352 Carrier assembly (mast section carrier): 80063; SM-JJ-423552 1 5820-00-973-0350 Clamp, rim clenching (mast section coupler): 80063; SM-C-423646 8 5340-00 973-0230 Guy assembly (39 ft): 80063; SMrD-423651 3 5975-00-715-0361 Guy assembly (47 ft): 80063; SM-D-423650 3 5975-00-71

38、4-8834 Guy assembly (65 ft): 80063; SM-D-423651 ;. 3 5975-00-715-7932 Guy attachment, top (guy ring assembly): 80063; SM-C-423561 1 4030-00-973-0189 Guy attachment, middle (guy ring assembly): 80063; SM-D-423560 1 4030-00-973-0188 Halyard, antenna (radius rope): 80063; SM-B-423575 1 5820-00-973-0298

39、 Hammer, 6 lb: 80063; SM-C-540011-1 1 5120-00-265-7462 Mast base (launcher): 80063; SM-D-423551 1 5820-00-973-0351 Mast section: 80063; SM-D-423556 8 5985-00-400-7274 Stake, Guy GP-2: 80063; SC-B-61956 4 4030-00-187-5261 Stake, Guy GP-112 . 3 4030-00-291-9354 Winch assembly: 80063; SM-C-423630; incl

40、udes: 1 3950-00-973-0258 1 ea. Crank handle: 80063; SM-C-423574A - 3950-00-954-0526 1 ea. Gear assembly: 80063; SM-C-540000 3010-00-135-2491 Wrench, spanner: 80063; SM-C-423605 1 5120-00-973-0257 Table 1-2. Extension Kit, Mast MK-806/GRC Component Qty National Stock No. Extension Kit, Mast MK-806/GR

41、C (This item is nonexpendable) (fig. 1-5) 5985-00-691-2344 Anchor guy (screw anchor): 80063; SM-B-423652 3 4030-00-580-7833 Bag BG-102A _ 1 8105-00-497-9628 Case, Mast Extension CY-4507/GRC 1 5985-00-226-6230 Coupling,grooved (mast section coupler): 80063; SM-C-423646 5 5340-00-973-0230 Guy attachme

42、nt (guy ring assembly): 80063; SM-D-423560 1 4030-00-973-0188 Guy assembly (98 ft lg): 80063; SM-D-424072 3 5445-00-892-9624 Guy assembly (78 ft lg): 80063; SM-D-424071 3 5445-00-892-9625 Mast section: 80063; SM-D-423556 5 5985-00-400-7274 Stake, Guy GP-112 3 4030-00-291-9354 Change 3 1-5 TM 11-5820

43、-538-12 CASE, MAST EXTENSION MAST SECTIONS (S EACH) GUY STAKE GP 412 U t3 EACH) GUY ASSEMBLY (6 EACH) SCREW ANCHORS ACCESSORY BAG BG-I02A GUY RING ASSEMBLY MAST COUPLER (5 EACH) B TM5820-46M2-33 Figure 1-5. Extension Kit, Mast MK-806/GRC, components. 1-6 Change 1 TM 11-5820-538-12 C3 CHAPTER 2 INSTA

44、LLATION SECTION I. SERVICE ON RECEIPT OF EQUIPMENT Unpacking (4) To unpack the launcher and mast sec- tion carrier, pull out the screwdrive nails, six from the front of the crate, and six from the a. Packaging Data. When packed for shipment, the components of the AB-577/GRC are packed in wooden boxe

45、s or crates as shown in figures 2-1 through 2-3. The components of the MK-806/GRC are packed in a similar manner. The packaging data is given in the following chart: rear. (5) Remove the wooden blocks that were held in place by the screwdrive nails. (6) Lift the assembly from the crate. Box No. AB-5

46、77/GRC: 1 of 3 2 of 3 3 of 3 Total weightAB-577/GRC MK-806/GRC: 1 of 2 2 of 2 Package dimensions 241/2 x 14V2 x 15% 401/2 x 13 x 6 97% x 16 9/16 x 28 9/16 65V2 x 18V4 x 123A 22 x I8V2 x 16 Total weight, MK-806/GRC tal weight Volume (cuft) 3.19 1.83 12.89 8.82 377 136 463 Unit weight (Ib) 72 58 197 3

47、27 94 42 Contents of box Guy bag and contents. Stake roll and contents. Launcher and mast carrier. Case, Mast Extension CY 4507/GRC and contents. Accessory Bag BG-102A and contents. b. Removing Contents. When unpacking equipment from wooden boxes, proceed as follows: WARNING Prevent personal injury

48、when applying or re- moving steel strapping by wearing heavy gloves and a protective faceshield. Do not handle packing cartons by the steel strapping. CAUTION Do not attempt to pry off the tops of the boxes. Damage to the equipment will result. (1) Remove the nails or staples that are driven through

49、 the wires that hold the covers closed. Use a nailpuller. (2) Carefully raise the cover, and fold it back. (3) Lift the guy bag and stake roll of the box. NOTE If possible, save the wooden boxes and crates for future use in packing for shipment or limited storage. 2-2. Checking Unpacked Equipment a. Inspect the equipment for possible damage incurred during shipment. If damage is present, report it as instructed in paragraph 1-3b b. Check to see that the equipment is complete as listed on the packing slip. If a packing slip is not available, check the equipment agains