KEYERS TG-34-A TG-34-B, AND KY-127/GG
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1 r ARMY TECHNICAL MANUAL DEPARTMENT OF THE AIR FORCE TECHNICAL ORDER IJ~ ~ ~orn~~~o~ ~ ~ o~ U@ ~~~]o~o~o~~ ORGANIZATIONAL MAINTENANCE KEYERS TG-34-A TG-34-B, AND KY-127/GG US Army Signal School Ubrary Fort Monmouth, N. 1. DE,PARTMENTS OF THE ARMY AND THE AIR FORCE JANUARY 1959
2 WARNING DANGEROUS VOLTAGES EXIST IN THIS EQUIPMENT Be careful when working on the 115- volt ac line connections. Serious injury or death may result from contact with these terminals. DON'T TAKE CHANCES!
3 I TECHNICAL MANUAL No TECHNICAL ORDER No. 43E TN\ / TO 43E DEPARTMENTS OF THE ARMY AND THE AIR FORCE WASHINGTON 25, D. C., 9 January 1959 KEYERS TG-34-A, TG-34-B, AND KY-127/GG CHAPTER 1. MAINTENANCE INSTRUCTIONS Paragraph Page Section 1. General. Scope I 2 Internal differences in models 2 2 Tools, materials, and test equipment required 3 2 Preventive maintenance 4 2 Lu brication 5 6 II. Troubleshooting. Visual inspection Equipment performance check lisl 7 6 Tube testing and replacem e nl R e placem ent of bell R eplacem ent of tape drive roil 10 9 Alinement of exciter lamp (TG-34-A only) : Adjustment of auxiliary cell control (TG- 34- A only) 12 9 CHAPTER 2. SHIPMENT AND LIMITED STORAGE Materials required for repackaging R epackaging for shipment or limited storage ApPENDIX 1. REFERENCES _" II II. MAINTENANCE ALLOCATION CHARTS FOR KEYERS TG-34- A, TG-34-B, AND K Y - 127/ GG *This manu al supersedes so much of TM , 25 October 1943, as is applicable to organizational maintenance. US Army SigntlJ ~,..,,\,,,,,,.Fort M.Dnmouth~ N., J... ~ih "~f.y
4 CHAPiER 1 MAINTENANCE INSTRUCTIONS 1. Scope Section I. a. This manual covers second echelon maintenance of Keyers TG-34-A, TG-34-B, and KY- 127/GG. The operating instructions for this equipment are contained in TM , Keyers TG-34-P..., TG-34-B, and KY- 127/GG, Operator's Manual. b. Second echelon maintenance of Keyers TG- 34-A, TG- 34-B, and KY-l27/GG consists of the following: (1) Replacement of defective fuses (TM ). (2) Preventive maintenance (par. 4). (3) Lubrication (par. 5). (4) V isual inspection (par. 6). (5) Equipment performance check (par. 7). (6) Replacement of defective tubes (par. 8). (7) Replacement of belt (par. 9). (8) Replacement of tape drive roll (par. 10). (9) Alinement of exciter lamp (par. 11). (10) Adjustment of auxiliary cell control (par. 12). c. For maintenance parts information, see SIG 7 & 8 KY-127/GG, KY-127/GG Keyer (includes Keyer TG-34-A, - B). d. Forward comments concerning this manual to the Commanding Officer, United States Army Signal Publications Agency, Fort Monmouth, N. J. Note. For applicable forms and records, see paragraph 2, TM Internal Differences in Models Keyer TG- 34- A is similar to Keyers TG-34- B and KY- l27/gg except that Keyer TG-34- A has an auxiliary cell control and provisions for adjusting the exciter lamp. 3. Tools, Materials, and Test Equipment Required The following chart lists the tools, materials, and test equipment required for unit repairman's maintenance. The chart also lists the associated technical manuals and the assigned common names. GENERAL Item Technical Common m anual name 4. Preventive Maintenance Multimeter TS- 297/U TM Multimete!'. Electron Tube Test Sets TV-7/U, TM Tube TV- 7A/U, and TV- 7B/U. tester. Tool Equipment TE- 4 t. Lubricating oi l, general purpose, preservative (PL special). G rease, ai rcraft a nd instrument (GL). Grease, graphite (GG). Cleaning Compound. Lint-free cloth. a. DA Form DA Form (figs. and 2) is a preventive maintenance checklist to be used by the unit repairman. Items not applicable to the equipment are lined out in the figures. Referances in the ITEM block in figure 2 are to paragraphs that contain additional maintenance information pertinent to the particular item. Additional preventive maintenance information concerning items 2, 3, 6, and 7 on DA Form wi ll be found in the preventive maintenance portion of TM Instructions for the use of the form appear on the form. b. Items. The information in this paragraph is supplementary to DA Form The item numbers correspond to the ITEM numbers on the form. Warning: Obtain permission to disconnect all power before performing the operations below. When power to the equipment is disconnected, some capacitors still may retain voltage of dangerous potential. Before touching exposed electrical parts, short-circuit the part to ground. When maintenance is completed, replace the equipment in its case, reconnect the power, and check for satisfactory operation. 2
5 l-- ADDITIONAL ITEMS FOR 20 AND 30 ECHELON INSPECTIONS ze. IF IPEeT 'ITEII d FeA Eeee. """e. ES. ee e!!ti! I. I CONDITIONI MAINTENANCE CHECK LIST FOR SIGNAL EQUIPMENT SOUND EQUIPMENT, RADIO, DIRECTION FINDING RADAR, CARRIER, RADIOSONDE AND TELEVISION (AR ) 27. CHECK FOR NORMAL OPERAT ION. 20. IF DEFICIENCIES NOTEO ARE NOT CORRECTED DURING THE INSPECTION. INDICATE ACTION TAKEN FOR CORRECTION. EQUIPMENT NOMENCLATURE if" Y E/~-r 6-J.y-A EOUIPMENT SERIAL NUtr.4BER (,,) ~ '" INSTRUCTIONS This form may be used for a period of one month by using the correct dates and weeks of the month. It is to be used as a Preventive Maintenance check list for Signal equipment in actual use, or for a check on equipment prior to issue. 1. For detailed Preventive Maintenance instructions see: a. The Technical Manual (in TM 11 series) for the equipment. (See DA Pamphlet Number 310-4) b. The Supply Bulletin (S series) for the equipment. (See DA Pamphlet Number 310-4) c. The Department of the Army Lubrication Order. (See DA Pamphlet Number 310-4) 2. The following action will be taken by either the Communications Office.r/ Chief for 1st echelon, or the Inspector for higher echelon: a. Enter Equipment Nomenclature and Serial Number. b. Strike out items that do not apply to the equipment. 3. Operator/ Inspector will enter in the columns entitled CONDITION. on the proper line, a Dotation regarding the condition. using symbols specified under LEGEND. 4, After operator completes each daily inspection he will initial over the appropriate dates under "Daily Condition for Month". then return form to his supervisor. TYPE OF I NSP E C non OPER-12/ 3 ECH ATOR ELON,/ DATE 1 it",. / 9S-8 SIGNATURE j?a..j- ~..-.."",- 4 OAt ~~~~, REPLACES OA FOR"",,S 1\ - 238, 1 NOV &!!: 11'23~, , 11-24&, ' 24~, 11 2,0, AND 11-2"; WHICH ARE OBSOLETE. Figure J. DA Forni J J -238, pages J and 4. TM
6 ocio LEGEND for mar-k"ingcoritflhons: Satisfactory. y. Adjustment, Repair or Replacement required, X. Defect corrected, ~. DAILY NO. _ ITEM. I, COMPLETENESS AND GENERAL CONDITION OF EQUIPMENT. (TranamJtter...,. carryin4 c.,a, wire, cables, tt.,b, ap_e part., tecmical manuals). 1/ II" DAIL.Y CONDITION FOR MONTH OF /VOVEMB l:. 1'J.58 1' /1"/1' 11 '0 11"/1 12/113,. / 22VZ3VZ41/ 25l/ 2el/ 27Vzei /1M/vVl/lM/l/l/1N '. m 0'""" "'''0''..o., eo- ~~%UM% 'i S 5 'i. JACKS, PLUGS, COMPONENT PANELS. 3, INSPECT CONTROLS FOR NORMAL OPERATION. TAP CONTROLS LIGHTLY FOR EVIDENCE OF CUT - OUT FROM LOOSE CONTACTS. 4. CHECK FOR NORMAL OPERATION OF EQUIPMENT. BE ALERT FOR UNUSUAL OPERATION OR CONDITION. V1/1M/l/1M/l~ WEEKLY 20 ADDITIONAL ITEMS FOR 20 AND 30 EC HELON INSPECTIONS '0 1ST ECH 15. CL.E... N... ND TIGHTEN EXTERIORS OF C"'SES. RACKS, MOUNTS. TRANSMISSION L.INES. e. INSPECT C"'SES. MOUNTS. ~ ~ "'ND EXPOSED MET... L. SURF"'CES FOR RUST, CORR'OSION. 7. INSPECT CORDS, C"'BL.E. WIRE. SHOCK MOUNTS FOR CUTS, KINKS, BRE"'KS. FR"'YING. UNDUE STR"'IN. 1"' ::=:= :::::::: : ::" p v' / IS. INSPECT SEATING OF RE"'DIL.Y ACCESSIBL.E PL.UCK OUT ITEMS: TUBES. L.... MPS. FUSES, CRYST"'L.S, CONNECTORS, VIBRATORS. PL.UG - IN COILS. Ie. iii.. P E "'... ~ ~ t '-p..:a::;rc: '-----ii--t i---1i ' e. ~N:I::~: G~ :~~STTOERRS;N:~:.H~~s~~::~ ~~S~UOL.L.AOTRO... R:I::.R CR... CKS. v. ~ I I I t PAR '0 ECH ELON <./" v- v CONDITION / It i / :!I(II « :. I - ID. CLEAN ANO TIGHTEN SWITCHES, TERMINAL. BL.OCKS, _ L _ BLOWERS, RELAY CASES "'ND INTERIORS OF CH"'SSIS AND C"'BINETS NOT READILY "'CCESSIBLE. PAR 4 / ' CLEAN ANO/ OR INSPECT AIR FILTERS. BRASS NAME PL'" TES, 01 AL "'NO ME TER WI NDOWS. ale 12. ~r-"""h"'" ~... r-.... _~...,.. '--S. v 22. INSPECT TRANSFORMERS, CHOKES, POTENTIOMETERS AND RHEOSTATS FOR OVERHEATING AND OIL I.:,EAK"'GE. 23. PAR. 4.,/ ADDITIONAL ITEMS FOR 20 AND 3D ECHELON INSPECTIONS CONDITION 1>. I, ~. I ~i C ~--" t"~' I:' '::S: e~ ~;;;;~ ;;;~=~==C=-1 I...IAI I S, t ':"; ; 7 q ~A;Eq 6~. Vet Ai... e81& Ii'.. etti. CONTINUED ON PAGE CPO 19';> '"'.. Figure 2. DA Form , pages 2 and 3.. TM _ 20-3
7 v LUBRICANT-INTERVAL MOTOR DRIVE PINION GG AND MESHING CONE GEAR CONE BEARINGS PL.-~ DISK SHAFT BEARING SPEED INDICATOR GEAR AND PINION PL GL M1IMI_.. r - ~. ~~,~.,..._- TI!.PE REWIND CRANK PL TAPE TAKE- OFF SPINPLE TAPE IDLER ROLLER TAPE PRESSURE ROLLER SHAFT AND BEARINGS TAPE TAKE - UP SPINDLE PL PL PL PL TAPE IDLER ROLLERS PL U'I NTERVAL- LUBRI CANT M PL DISK SHAFT BEARING CAUTION: 00 NOT OVER LUBRICATE, APPLY I OR 2 DROPS TO ALL POINTS EXCEPT WHERE OTHERWISE NOTED. LUBRICANT-INTERVAL MOTOR BEARINGS PL W -KEY- LUBRICANTS-ALL TEMPERATURES INTERVALS PL - OI L, LUBR1CI!.TING, PRESERVATI VE, SPECIAL W-WEEKLY GG - GREASE, GRAPHITE, SOFT M - MONTHLY S- SEMI ANNUALLY GL - GREI!.SE, INSTRUMENT A - ANNUALLY I I TM Figure 3. Lubrication of keyer.
8 Item Maintenance procedures 7 Examine the power cord to be sure that it is in good condition. Replace the cord if the outer insu lation is broken or cracked. If the electrical connectors a rc damaged or broken, repla e them. 10 A ll controls should work smoothly, be tight on th e sha ft, a nd should not bind. T ighten a ll loose control knobs a nd be sure that the knobs do not rub against the panel. C heck the tra nsformers a nd motor; make sure they a re ti ght. 15 Press a ll tubes, lamps, a nd fuses into their sockets and wipe the tubes and chassis surface with a dry cloth. 19 Inspect fan blades on the motor shaft end; if grease or dust h as accumula ted, clean wi th a lint-free cloth moistened with Cleaning Compound (Fed stock No ) to remove' all oil and grease from the cone a nd belt. 22 Check the transformer for overheating soo n a fte r shutting down the equipment. Warning: Cleaning Compound is flammable and its fumes are toxic. Do not use near a flame; provide adequate ventilation. 5. Lubrication (fig. 3) Caution: Be sure no oil or grease collects on the drive cone and drive disk. Grease and oil on the drive cone and drive disk will destroy the friction bond between these members and the keyer will cease to function. a. The symbol W stands for a period of 1 week. The symbol M means every month. T he symbol S means every 6 months. The symbol A means once a year. A month interval consists of 30 days of normal 8-hour operation. If the equipment is operated more than 8 hours a day, the lubrication intervals will have to be adjusted to prevent excessive wear. For example, if the equipment is operated 16 hours a day instead of 8, the motor drive pinion and meshing cone gear will have to be lubricated every 3 months instead of every 6 months (fig. 3). b. Loosen the holding screws 10 ated on the upper corners of the fron t panel and at the sides of the rear cover; remove the chassis from the case. Clean the areas to be lubricated with a brush dipped in Cleaning Compound. R emove excess cleaner from the brush to prevent the Cleaning Compound from dripping into the equipment. c. To apply grease to the gears and pinions, use a thin long-handled brush. Rotate the speed indicator gear and meshing cone gear as necessary to expose all gear teeth for lubrication. To a pply oil, dip a piece of wire into the oil to collect a sma ll drop at the end. Transfer the oil to the bearings by touching the wire to the bearings. Section II. TROUBLESHOOTING 6. Visual Inspection a. Before operating the equipment, inspect it. This will save repair time and may also avoid further damage to the keyer. Inspect the following for obvious defects. (1) Wiring. (2) Tape-transport mechanism. (3) Motor. (4) Tubes. (5) F uses (usually indicates some other fault). b. If the above checks do not locate the trouble, see the equipment performance checklist (par. 7). 7. Equipment Performance Checklist a. General. The equipment performance checklist is a list of procedures used to check systematically equipment performance. Corrective measures which the unit repairman can perform are given in the Corrective measures column. When using the check- 6 list, start at the beginning and fo llow each step in order. If the corrective measures indicated do not fix the equipment, troubleshooting is required by higher echelon. Note on the repair tag how the equipment perform ed and what corrective measures were taken. 8. Tube Testing and Replacement Note. T he tube location diagrams a rc i n T M When trouble occurs, check a ll wiring, onnections, a nd controls before removing a ny tubes. Try to isolate the trouble to a component or stage. If tube fa ilure is suspect d, usc the proccdures ('1 a a nd b below (0 c heek the tubes. a. Use oj Tube TesLer. R emove a nd test one tube a t a time. D iscard a tube only if its defect is obvious or if the tube tester shows it to be defective. Do not discard a tu be that tests at or near its minimum test limit on the tube tester. Put back the
9 /"" ~~ b. Checklist Step ~ction Normal indication Corrective measures > "" a I <[ <[ "" fr; 1:: 2 3 I "'- Check position of change-over switch to be sure tha~ it is set for proper voltage. Connect power cord to power source. ~ Thread code practice tape through scanning mechanism (TM ). I "" <[ t;:; Turn AC-OFF -VOL UME control clockwise; a click I Indicator dial lamp lights. indicates that power is applied. Set control to its mid position. Turn PE CELL control clockwise; a click indicates I Exciter lamp lights. that power is appli ed. Set control to its midposition. Set SPEAKER switch to ON. Steady tone from speaker is heard when tubes are heated (when uninked portion covers aperture). Check power cable connections. R eplace fuse. R eplace dial lamp (TM I ). R eplace lamp (TM ). Clean aperture in scanning mechanism. Adjust AC-OFF-VOL UME control. Adjust PE CELL control. Check tubes (par. 8). Adjust and refocus exciter lamp (par. 1 I). 'I ~ '-' :z <[ ::;; "" ~ ~ I- :z ~ :::> S 7 Turn MOTOR switch to ON. Move pressure roller downward until it contacts tape on tape drive roll. Tape will move over anvil (keyed signal will be heard). R eplace tape drive roll (par. 10). Adjust thumbscrew on front of scanning mechanism faceplate until mark portions of ink signal line uncover scanning aperture. If signals sound blurred, adjust PE CELL control. R eplace belt (par. 9). Adjust auxiliary cell control (par. 12). Higher echelon repair required. 8 Turn MOTOR switch to OFF position. Motor ceases to operate. " a t;:; 9 10 Set SPEAKER switch to OFF position. Turn PE CELL counterclockwise. Tone from speaker ceases. Exciter lamp goes off. II Turn AC-OFF -VOL UME control counterclockwise. Indicator dial lamp goes off.
10 original tube, or insert a new one if required, beforetesting the next one. Caution: Do not rock or rotate a tube when removing it from a socket; pull it straight out. b. Preferred-Type Tube. A preferred-type electron tube, type 5Y3WGTA, has been developed as a direct replacement for nonpreferred-type 5 Y3GT. This tube is used in the rectifier stage. When replacement of a 5Y3GT-type is necessary, replace it with a 5Y3WGTA. Do not substitute a 5Y3GT for a 5Y3WGTA. 9. Replacement of Belt (fig. 4) a. Loosen the holding screws located on the upper corner of the front panel and at the sides of the rear cover; remove the keyer chassis from the case. b. Remove the weldless chain. c. Loosen the set screws that hold the disk shaft bearing on the rear of the disk shaft; remove the bearing. d. Hold the drive disk and remove the disk shaft. e. Raise the yoke until it stops and remove the drive disk. j Roll off the old belt from the drive disk; roll a new belt into place and be careful not to twist it. g. Place the drive disk in the slot of the yoke and press the yoke down. WELDLESS CHAIN --- TAPE DRIVE ,. ROLL ACORN NUT BELT YOKE LAMP MOUNTING BRACKET LAMP BRACKET MOUNTING NUT ANVIL TM Figure 4. Keyer TG-34-A, showing tape drive roll assembly, auxiliary cell control, and lamp mounting bracket. 8
11 h. Insert the disk shaft and aline the keyway on the disk shaft and the key on the drive disk. i. Replace the disk shaft bearing on the disk shaft; tighten the set screws. j. Replace the weldless chain and be sure it is twisted Y2 turn. k. Replace the chassis in the cabinet; tighten the holding screws. 10. Replacement of Tape Drive Rol'l (fig. 4) a. Remove the acorn nut from the disk shaft. b. Remove the washer and the tape drive roll. c. Replace the defective tape drive roll with a new one; replace the washer. d. Replace and tighten the accrn nut on the disk shaft. 11. Alinement of Exciter Lamp (TG-34-A Only) (fig. 4) When the keyer output is below normal and the tubes and exciter lamp are good, the trouble may be that not enough light is reaching the photoelectric cell. Center the spot over the aperture by adjusting the exciter lamp as follows: a. Remove the chassis from the case (par. 9a). b. Remove tubes 102 and 101 from their sockets. c. Loosen the lamp bracket-mounting nuts. d. To move the light spot forward on the anvil, shift the spacing washers to move the lamp bracket farther back from the panel. e. To move the light spot farther back on the anvil, shift the washers to move the lamp mounting bracket closer to the panel. j Re-mount lamp mounting bracket and partially tighten the lamp bracket-mounting nuts. g. Move the lamp mounting bracket slightly up or down to obtain the sharpest possible focus on the tape anvil; tighten the lamp bracket-mounting nuts. h. Replace tubes 101 and 102 in their respective sockets. i. Replace the keyer chassis in its case; tighten the holding screws. 12. Adjustment of Auxiliary Cell Control (TG-34-A Only) If no signal is heard or if a steady signal is heard, the PE CELL control must be adjusted for a keyed output. If adjustment of the PE CELL control has no effect on the keyed output, adjust the auxiliary cell control. N ote. Adjustment of the a uxiliary cell control should be necessary only in cases where the photoelectric cell a nd the tubes test near their minimum test limits on the tube tester. a. Remove the chassis from the case (par. 9a). b. Set the PE CELL control to its midposition. c. Adjust the auxiliary cell control until the signal cuts off when the aperture is covered. d. Readjust the PE CELL control for a fine adjustment of the signal. e. Replace the chassis in the cabinet; tighten the holding screws. 9
12 CHAPTER 2 SHIPMENT AND LIMITED STORAGE 13. Materials Required for Repackaging The following materials are required for packaging Keyers TG-34-A, TG- 34-B, or KY- 127/GG. For stock numbers of materials, consult SB , Preservation, Packaging and Packing Materials, Supplies, and Equipment Used in the Army. Mat -rial Corrugated fiberboa rd _ Waterproof wrapping paper Gummed paper tape Waterproof, pressure-sensitive adhesive tape. Wooden packing case (2 1 by 11 by 11 inches). Steel strapping QuantilY 12 sq. ft. 14 sq. [t. 15 fl- 10ft. 1 ea. 10 ft. 14. Repackaging for Shipment or Limited 5rorage Note. Disassembly procedures for the keyer are in TM a. Packaging. Package the keyer as outlined below. (1) Technical manual. Package each technical manual within a close-fitting bag fabricated of waterproof wrapping paper. Seal the bag with waterproof, pressure-sensitive adhesive tape. (2) Miscellaneous components. Package each spare tube (including tubes and photoelectric cell not securely clamped in place), spare lamps, spare fuses, wrench, and spare belt in a double wrap of flexible,.single-face, corrugated flberboard. Secure the ends of the packages with gummed paper tape. Consolidate the miscellaneous components packaged as specified by wrapping together in flexible, single-face, corrugated fiberboard to form a flat, compact package of size to fit into the end of the keyer carrying case. Secure the wrapping with gummed paper tape. (3) Kf!)'er. Place the reel and power cable in the upper part of the keyer case in the space provided. Close the cover and secure _ the spring catches. Package the keyer in a double wrap of corrugated fiberboard; secure the ends of the package with gummed paper tape. b. Packing. (1) Place the keyer at one end of the wooden packing case. Fill all voids with pads made from waterproofed wrapping paper. Within the balance of the wooden box, form a liner made from waterproofed wrappll1g paper. (2) Place the consolidated packaged spares (a(2) above) within the waterproof liner and fill all voids with flexible, single-face, corrugated fiberboard. Make certain the contents fit snugly and cannot move within the wooden box. (3) Seal the liner securely with waterproof pressure-sensi ti ve adhesive tape. (4) Place the packaged techni al manual on top of the keyer case and nail the wooden cover in place. (5) For intertheater shipment, secure the wooden packing case with metal strapping. 10
13 APPENDIX I REFERENCES The following is a list of applicable references for the unit repairman of Keyers TG- 34-A, TG- 34- B, and KY- 127/ GG. T Keyers TG- 34- A, TG-34- B, and KY- 127 / GG, Operator's 11anual. T Electron Tube Test Sets TV- 7/ U, TV- 7A/ U, and TV- 7B / U. T ultimeter TS- 297 / U. 11
14 APPENDIX II MAINTENANCE ALLOCATION CHART FOR KEYERS TG-34-A, TG-34-B, AND KY -127/GG Section I. INTRODUCTION 1. General The maintenance allocation portion of this manual assigns maintenance functions and repair operations to be performed by the lowest appropriate maintenance echelon. It also specifies the tools and other equipment authorized at each echelon to perform the assigned maintenance functions. 2. Allocation of Maintenance Functions (Section II) The column headings of section II are defined as follows: a. Part or Component. Column 1 shows vnly the nomenclature ur standard item name. Additional descriptive data are included only where clarification is necessary to identify the part. b. ReLated Operation. Column 2 indicates the various maintenance functions a llocated to the echelon capable of performing the operation. These are defined as follows: (1) Service. To clean, to preserve, and to replenish fuel and lu bricants. (2) Aqjust. To regulate periodically to prevent malfunction. (3) Inspect. To verify serviceability and to detect incipient electrical or mechanical failure by scrutiny. (4) Test. To verify serviceability and to detect incipient electrical or mechanical failure by use of special equipment, such as gages, meters, etc. (5) RepLace. To substitute serviceable assemblies, subassemblies, and parts for unserviceable components. (6) Repair. To restore to a serviceable condition by replacing unserviceable parts or by any other action required utilizing tools, equipment, and skills available, to include welding, grinding, riveting, straightening, adjusting, etc. (7) Rebuild. To restore to a condition comparable to new by disassembling the item to determine the condition of each of its component parts and reassembling it by using serviceable, rebuil t, or new assemblies, subassemblies, and parts. c. 1st, 2d, 3d, 4th, 5th EcheLon. The symbol X in column 3, 4, 5, 6, or 7 indicates that that echelon and higher echelons are responsible for the maintenance function indicated. Repair parts may not, necessari ly, be stocked at the echelon indicated see the applicable Repair Parts and Special Tools List. d. Repair Facilities Code. The numbers in column 8 in~icate tool, test, and maintenance equipments required to perform the relaled maintenance [unction. These numbers are identified in Section III Allocation of Tools for Maintenance Functions. ' e. Remarks. Column 9 contains any notations necessary to clarify the data cited in the preceding columns. 3. Allocation of Tools for Maintenance Functions (Section III) The column headings of section III are defined as follows: a. FaciLities RequiredJor Maintenance Operations. Column 1 lists the tools, test, and other maintenance equipment required to perform the maintenance functions. b. 1st, 2d, 3d, 4th, 5th Echelon. The symbol t in column 3, 4, 5, or 6 indicates that the tool or test equipment is allocated to that echelon (column 2 is not used). c. Repair Facii ties Code. The numbers in column 7 are code numbers that stand for the associated maintenance equipment and are used in section II, Allocation of Maintenance Functions, to refer to the indicated item. d. Remarks. (Not used.) 12
15 ~, 'J' Section II. ALLOCATION OF MAINTENANCE FUNCTIONS.U,,, EI '" '0' 'W I '" ~E:LAn:D lit 2nd 3rd 41h 5th REPAIR PART OR COMPONENT FACILlTI[O REMARKS OPER ATION IWH lech ECH lech [CH CODe:.u, KEYER KY- 127/ GG, KEYER TG-34-A, B BELT re place X CABLE, POWER ELECfRICAL r eplace X CAPACITOR re place X CHAIN, WELDLESS repl ace X CONNECfOR, PLUG, ELECfRlCAL re place X w CONNECfOR, RECEPTACLE ELECfRICAL replace X CRANK re place X CRYSTAL, UNIT RECfIFYING re pl ace X DIAL re plac e X ELECfRON TUBE repla c e X s e rvice X Ex t ernal Pa rts. s ervice X I nt e rio r Pa r ts. inspect X External Par ts. i nspect X Interior Parts. ad jus t X 2, 8 Perfo rm s initial ad jus tments and adjus t me nts necessa ry to co rrect mino r malfun c t ioning of equipmen t. ad just X 3, 5, 9 All adjustments. t es t X 2,5, 8 Pe r fo rms r e sistance, volt age and current measurement t o de t e rmine condition oi circ ui t s. t es t X 1,3,4, 6, 7, 9 Os cilia to r I Frequency, Powe r Output, Ta pe Spee d, Si gna l Requireme nts. KY-1 27/ GG Unci TG-34-A, B) 1
16 Section II. ALLOCA non OF MAINTENANCE FUNCTIONS-Continued. " 1 " 101,., \~I \DI III l U I,~ RE: LAHD lit 2nd 3rd 41 h!lth REPAIR PAR T OR CO MPON[NT FACILlTI[1l RE MARK S OPE:RATION E:CH IWH IWH [ CH [ CH CODE: KY-127/ GG (Incl TG-34- A, B) (continued) FUSE, CARTRIDGE replace X FUSE, POST FU-39 replace X GEAR replace X JACK, TELEPHONE replace X KNOB replace X LA~IP, INCA.>IDESCEN"T replace X LAMPHOLDER replace X LOUDSPEAKER replace X MOTOR replace X ~ repair rebuild PHOTO ELECTRIC CELL replace X REACTOR replace X REEL PH-310 replace X RESISTOR replace X ROLL, TAPE DRIVE replace X SCREW replace X SOCKET replace X SPROCKET WHEEL AND GEAR ASSEMBLY replace X S\\'ITCH replace X TRANSFORMER replace X ~~HER replace X X X ---- KY-127/ GG (Incl TG-34--A, B1 2
17 Section III. '" ALLOCATION OF TOOLS FOR MAINTENANCE FUNCTIONS \1;;1 ", I &t Ii!nEl ~rd 4th 5th FAOIL- FACILITIUl I'U:eUIAED FOR MAINTENAN6E GP EAATION8 foh ~OH foh [OH EOH ITIU OODE KY-127/ GG (loci TG-34-A, B) (continued) FREQUENCY METER FR 67/ U t t 1 /.IULTDIETER TS-297/ U t 2 /.IULTIMETER TS 352!U t t t 3 OSCILLOSCOPE OS-8A/ U t t 4 TEST SET ELECTRON TUBE TV-7/ U t t 5 TEST SET ELECTRON TUBE TV-2/ U t t 6 TEST SET TS-140/ PCM t t 7 TOOL EQUIPMENT TE-41 t 8 TOOL EQUIPMENT TE-113 t t t 9 '" ' ;.II ' 0' ", I.' REPAIR ~E:MA~KS VI ~~,:::,VS ~~.::;,~ &v, S:::::J - '".Q.) t:::::~. ~v, () -0 ~.::::r- 0 r-- ~ ~ ~ KY-127/GG (Incl TG-34-A, B) i
18 [AC (26 Nov 58)] By ORDER OF THE SECRETARIES OF THE ARMY AND THE AIR FORCE: OFFICIAL: R. V. LEE, Major General, United States Army, The Adjutant General. MAXWELL D. TAYLOR, General, United States Arn!J', Chief oj Staff. OFFICIAL: J. L. TARR, Colonel, United States Air Force, Director of Administrative Services. THOMAS D. WHITE, Chief of Staff, United States Air Force. Distribution: Active Amry: ASA (2) CNCB ( I) Technical Stf, DA ( I) cxcept CSigO (30) Technical Stf Bd ( I) USCONARC (5) USA Arty Bd (I) USA Armor Bd ( I) USA Inf Bd ( I) USA Air Def Bd ( I ) USA Abn & Elct Bd ( I) USA Avn Bd (I) USA Armor Bd T est Sec ( I ) USA Air Def Bd Test Sec (I) USA Arctic T est Bd (I) US ARADCOM (2) US ARADCOM Rgn (2) OS Maj Comd (5) OS Base Comd (5) Log Comd (5) MDW( I) Armies (5) Corps (2) Div (2) USATC (2) Svc Colleges (5) Br Svc Sch (5) except USASCS (25) Cen Depots (2) except Atlanta Cen Depot (None) Sig Sec, Cen Depots (10) Sig Depots (17) Army Pictorial Cen (2) Engr Maint Cen (I) USA Sp Warfare Cen (5) TASS A (15) M id-western Rgn Ofc (TASSA) ( I) USA Sig Pub Agcy (8) USA Sig Engr Agcy ( I) USA Comm Agcy (2) USA Sig Eqp Spt Agcy (2) USA Sig Msi Spt Agcy (13 ) WRAMC ( I) AFIP ( I) AMS ( I) Ports of Emb (OS) (2) Trans Terminal Comd ( I) Army Terminals (1) OS Sup Agcy (2) Yuma Test Sta (2) USA Elct PC (I) NG: State AC (3); units-same as Active Army' except allowance is one eopy to each unit. USAR: None. For explanation of abbreviations used see AR Sig Lab (5) Sig Fld Maint Shops (3) USA Ord Msl Comd (3) Fld Comd, AFSWP (5) M il Dist ( I) Sector Comd, USA Corps (Res) ( I) USA Corps (Res) ( I) JBUSMC (2) Mil Mis (2) U nits organized under fo llowing TOE's: 11-7 (2) (2) (2) (2) I I-57 (2) I 1-500(AA- AE) (2) (2) (2) (2) (2) (2) (2) (2) (2) (2) (2) 16 U. S, GOVERNMENT PRINTING OFF ICE ; 1959 OF
19 I',..' I ~slloc I Libra(~ : Cut', N. J. TM C 1 TECHNICAL MANUAL Organizational Maintenance KEYERS TG-34-A/ TG-34-B/ AND KY-127/GG T~ ) CHANGES No.1 HEADQUARTERS, DEPART~ENT OF THE AR~Y WASHINGTON, D.C., 13 August 1963 T~ , 9 January 1959, is changed as follows: Page 2. Paragraph 1. Subparagraph b(2). Paragraph 3, chart. Item column, line 3. Delete subparagraph (2) and substitute: After "TV-7BjU," add 'rv-7c/u and TV-7D/U. (2) Quarterly preventive maintenance chccks Technical manual column, line 2. Delete "T~ and services (par. 4.2) " and substitute TM Subparagraph t. Delete "SIG 7 & 8 KY _ Delete paragraph 4 and substitute: 127 jgg, KY /GG Keyer (includes 4. Preventive Maintenance Keyer TG- 34-A, - B)" and substitute:': a. Preventive maintenance is the systematic T~ P, Organizational care, inspection, and servicing of equipment to Maintenance Repair Parts and Special maintain it in serviceable condition, prevent Tools List for Keyers TG- 34- A, TG- breakdowns, and assure maximum operational 34-B, and KY-127/GG. Subparagraph d. Delete subpa.i9,groph d nnd substitute: d. Forward all comments on this publication direct to: Commanding Officer, U.S. Army Electronics ~ateriel Support Agency, ATTN: SEL~S-MP, FOIt Monmouth, N.J., DA Form 1598 (Record of Comments on Publications), DA Form 2496 (Disposition Form), or letter may be used. Note. For applicable forms and records, refer to paragraph 2, TM Add paragraph 1.1 after paragraph 1: 1.1. Index of Publications Refer to the latest issue of DA Pam to determine whether ther!:' are new editions, changes, or additional publications pertaining to the keyer set. DA Pam is an index of current technical manuals, technical bulletins, supply bulletins, lubrication orders, and modification work orders that are a,vailable through publications supply channels. The index lists the individual parts (- 10, -20, -35P, etc.) and the latest cha,nges and revisions of each equipment publication. capability. Preventive 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 maintenance checks for the keyer set at the second echelon level are made at quarterly intervals unless otherwise directed by the commanding officer. The preventive maintenance checks and services should be scheduled concurrently with the periodic service schedule of the other equipment when the keyer set is used as part of a system. b. Maintenance forms and records to be used and maintained on this equipment are specified in TM Add paragraphs 4,1 and 4.2 after paragraph Ouarterly Maintenance Perform all the checks and services listed in the quarterly preventive maintenance checks and services chart (par. 4.2) in the sequence listed. Record all deficiencies or shortcomings in accordance with the requirements of TM TAGO 29'2A.- Aug '-63 \,~ ~r~v '":1 S,, j 01 Library '1 f
20 4~2. Quarterly Preventive Maintenance Checks and Services Chart Sequence Item Procedure Roterencea No.. J 1 Interior of case and chassis Warning: Cleaning compound is flammable and its fumes are toxic. Do not use near flame and provide 'Motor and internal parts adequate ventilation.. Use a cloth moistened with cleaning compound to re- Figs. 3 and 4. move dust, dirt, moisture, and grease from fan ' blades on motor shaft, cone, belt, and all accessible areas. a. Check motor for overheating and sideplay b. Inspect internal wiring for cuts, cracked or gouged.. jackets, fraying, and bruises, and kinks. c. Inspect part.s for cracks, chipping., blister.ing, moisture, and discoloration. 'a. Fig. 3: b., None. c. Non~. 3 Switches and terminal blocks _ Clean and tighten loose switches and terminal blocks and inspect for moisture accumulation. None. 4 Lubrication _ Lubricate equipment ~ Par. 5. Parts _ 5 Inspect and replace any part, authorized in maintenance App. II. allocation chart, that has reached a condition where further adjustment would result in marginal 'I'. 9. Controls and switches " reliability. While checking for normal operation (item 7), observe that mechanical action of each control and switch is smooth and free of external and internal binding. None. 7 Operation Check for normal operatioll ~ _ Par.7b., z::.~ge 11. Delete appendix I and substitute: ; Tbe.following is a list of applicable references for tbe organizational repairman of Keyers TG-34-A, TG-34-B, and KY-127/GG: AR AR 'AR AR DA Pam I;,,.',i,.'.DA Pam 3~0-4 FM 21-5 FM 21-6 FM i2 Dictionary of United States Army Terms. Authorized Abbreviations and Brevity Codes. Report of Damaged or Improper Shipment. Organization, Policies, and Responsibilities for Maintenance Operations. Index of Army Motion Pictures) Film Strips, Slidl;ls, and Phono-Recordings. lndex of Technical Manuals, Technical Bulletins, Supply Bulletins, Lubrication Orders, and Modification Work OrClers. Mili tary Training. Techniques of Military Instruction. Military Symbols. APPENDIX I REFERENCES TM TM TM TM TM P TM Multimeter TS-297jU. Operator's Manual, Code Practice Equipments EE-94-F, EE- 95- F, EE-96-D, EE-96-,, E and EE- 96-F and Telegraphic Code Trainers AN / FGC-Tl, AN/FGC-T2, AN/ FGC- T3, and AN/FGC- T4. Operator's and Organizational Maintenance Manual: Test Sets, Electron Tube TV-7 ju, TV-7AjU, TV-7BjU, TV- 7C/ U, and TV-7DjU.. Operator's Manual: Keyers TG.- 34-A, TG-34-B, and KY -127/ GG. ' Organizational Maintenance Repair Parts and SpeCial Tools List for Keyers TG-34-A, TG-34-B, and KY-127/GG. The Army Equipment Records System and Procedures.. ' ' TAGO 292A
21 By Order of the Secretary of the Army: Official: J. C. LAMBERT, Major General, United State8 Army, The Adj?dant General. EARLE G. WHEELER, General, United States Army Ohief of Staff. ' Distribution: Active Army: DASA (6) USASA (2) CNGB (1) CofEngrs (1) TSG (1) CSigO (7) CofT (1) CSptS (1) USA CD Agcy (1) USCON ARC (5) USAMC (5) ARADCOM (2) ARADCOM Rgn (2) OS Mai Comd (3) OS Base Comd (2) LOGCOMD (2) USAECOM (5) USAMICOM (4) USASCC (4) MDW (1) Armies (2) Corps (2) USA Corps (3) USATC AD (2) USATC Engr (2) USATC lnf (2) USATC Armor (2) USASTC (5) lnst! (2) except Ft Monmouth (65) Svc Colleges (2) Br Svc Sch (2) except GENDEP (OS) (2) Sig Dep (OS) (12) Sig Sec, GENDEP (5) Army Dep (2) except Ft Worth (8) Lexington (12) Sacramento (28) Tobyhanna (12) USA Elct RD Actv, White Sands (13) USA Elct RD Actv, Ft Huachuca (2) USA Trans Tml Comd (1) Army Tml (1) POE (1) USAOSA (1) AMS (1) WRAMC (1) NO: State AG (3); units-same as Active Army except allowance is one copy each unit. USAR: None. For explanation of abbreviations used see AR AFIP (1) Army Pic Cen (2) USA Mbl Spt Cen (1) USA Elct Mat Agcy (12) Chicago Proc Dist (1) USARCARIB Sig Agcy (1) Sig Fld Maint Shop (3) Units organized under following TOE's (Two copies each unit unless otherwise indicated) : (AA-AC) (4) TAGO 292A 3. S. GOVERHIIEIT PRI.TlN; OFFIC!d'"
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