1、10 March 1975 SUPEMEDING MIL -He45 586 i3 November i969 (See Section 6) MILITARY SPECIFICATION HOWIT!ZEX, LIGHT, TOWED, 105IM: Ml02 This specification is approved for use by all Departments and Agencies of the Department of Defense. 1. SCOPE 1.1 This specification covers one type of lO5Mb light towe
2、d Howitzer, Mi02, conkisting of the M137A1 cannon, M37A1 Recoil Mechanism, and the M3l carriage. 2. APPLICABLE DOCuMEpirTS 2.1 The following documents, of the issue in effect on date of in- vitation for bids or request for proposal, form a part of the specification to the exbent specified herein. SP
3、ECIFICATIONS Fed eral 3TZqgt) - Paint; Stencil, Flat. m6 - Hydraulic Fluid, Petroleum Base, Aircraft, Missile, and Ordnance. servation and Testing, 1-6083 - Hydraulic Fluid, Petroleum Base, for Pre- MIL-H-6088 P Heat Treatment of Aluminum Alloys. MIL-1-6866 - Inspection, Penetrant, Method of, MIL-S-
4、6872 - Soldering Process, General Specification for MIL-H-6875 - Heat Treatment of Steels (Aircraft Practice, Prtocess for). 3c i015 THIS DOCUMENT COMTAIINS PAGES. Ls -:-i.,- . .c Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-H- 455 86A MIL- 5-
5、7742 MIL-P-1423 MIL-E-16053 MIL-M-437l9 MIL-W -45205 Ma;-c-45579 MIL-1-45607 STANDARDS Federal FED-STD- 595 Military m-STD-g HL-STD-930 MIL-STD-173. DRAWINGS Screw Threads, Standard, Optimum Selected 1 Series: General Specification for. Parts, Equipnent and Tools for Army Materiel hckaging and Packi
6、ng of. Electrodes, Welding, Bare, Aluminum Alloys. Marking Society AWS A2.0 - Welding Symbols (Application for copies should be addressed to the American Welding Society, United Engineering Center, 345 East 47th Street, New York, New York 10017. ) 3. REQUIREMENTS 3.1 First article. Requirements for
7、submission of First article shall be as specified in the contract (see 6.2). ified (see 6,2) ) the first article shall include the pilot pack ( see 5.1). Unless otherwise spec- 3.2 14aterials, construction and design. The howitzer shall conform to the materials, construction and design requirements
8、specified herein, and on Drawing F8428300. 3.2.1 Heat treatment. Unless otherwise specified on the applicable drawing, heat treatment for aluminum alloys shall conform to MIL-H-6088 and for steel shall conform to MIL-1-1-6875. 3.2.2 Dimensions. Dimensions and tolerances of parts and assemblies of th
9、e recoil mechanism and carriage shall conform to the detailed drawings of Drawing FF8428300. Interpretation of the dimensions and tolerances shall be in accordance dth ANSI - n4.5. 3.2.3 Surface texture. applicable drawings. be as defined in ANSI 46.1. Surface texture shall be as specified on the In
10、terpretation of surface roughness symbols shall 3.2.4 Protective finishes. 3.2.4.1 Inorganic finishes. Parts requiring an inorganic finish shall be finished or coated as indicated on the applicable drawings and in accordance with MIL-STD-171. 3 Provided by IHSNot for ResaleNo reproduction or network
11、ing permitted without license from IHS-,-,-MIL-H-4558bA 10 m 7797906 0308038 m MIL-H-54W36A P 3.2.4.2 Painting. The parts and assemblies shall be painte as I specified on the draw3ng and in accordance with MuSTD-l7l. The visible surfaces of attaching hardware (nuts, screus, washers, etc.), exposed u
12、n- painted surfaces of mounting faces, or blemished azeas shall be primed and painted to match surrounding surfaces after final assenibly. To avoid necessity of painting exposed surfaces of cadmium plated hardware (in- cluding screws, nuts, and washers), the hasdware may be dyed with a supple- menta
13、ry chrotnate finish, Olive Drab 24087 of Federal Standard 595 (see 6.3.2). 3.2.5 Welding. Interpretation of weld symbols specified on the applicable drawings shall be as defined in AWS A2.0. Actual production of weldments shaU. not proceed prior to Government approval of the con- tractors welding pr
14、ocedures and test specimens of the applicable welding apecifications. All plug welds shall be flush and free of snags or protrusions. drawing or in the welding specification. Wld spatter and similar excess weld shau be removed. Grinding flush is not required unless specified on %he 3.2.5.1 Welding,
15、aluminum alloy. Welding of alwninwn alloy parts shall conform to MTL-W-45205. shall be used for aluminum alloy welds. Type 51.83 or 5556 welding elec- trodes of MIL-E-16053 my be used if “ype 5356 welding electrode is una- vailable * me 5356 welding electrode of MIL-E-16053 3.2.5.2 Welding, ferrous
16、metals8 Welding of steel parts and assem- blid shall be in accordance with the specification referenced on the applicable drawings. 3.2.5.3 iiod. The recoil mechanism shall function without erratic 3.3.1.2 Friction. Friction of the recoil rod when assembled in the Recoil Cylinder, and the floating p
17、istion assembly, shailbe within the limits specified in Table I after assembly, after gymastication, and after proof-firing. 5 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-H-455bA 10 797770b 0308020 b W MIL-E-45 58 when exposed to the atmosphe
18、re for 15 minutes, the aeration bubbles shall disappear; after exposure to the atmosphere for one hour, there shall be no sediment at the bottom of the glass beaker. Testing shall be as speci- fied in 4.5,3.2 and 4.5.3.5. Within the first minute 3.3.1.6 sdicator an control asserriby. The torque requ
19、ired to rotate the Indicator and Control Assembly (F843284) thru 3 Cycle fime, Total Seconds Number (xlaniber Percent simulated Recoil 8ooF 79% of Tessure Charge Elevation Length an over and under Rotmas Actual PSI (Reference) Degree Inches Min Max Min Max *Note: phis round may be fir projectile) or
20、 equivalent, in accordance with Table III. The carriage shall Wction without evidence of malfunction or failure. Variable 3sl tramne1 markings fromtheir init$al position after proof-firing. shaU not be more than 1/32 inch. Testing shall be as spcffled in 4.5.3.5.2, Table III - Proof-firing Chanber P
21、ressure Percent No. of Actual Chaxge Elevations Rounds P.S.I. (Reference ) Degrees - *Note: Iphis round may be fired at O degrees elevation with the variable recoil arm locked for short recoil. 9 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-H-
22、i.1558bA LO = 77797Ob 030802i.1 3 3.3.5 Road test. The completely assenibled cwriage shaJ3. be capable of withstandhg the following 50 mile road test without damage, perment deformation or loosening of parts. The trammel amking requirement.used for proof-firing (see 3.3.4.2), shaXL also apply for ro
23、ad testing. shall be as specified in 4.5.3.6. Testipg 35 miles at 35 miles per hour (MPH), over hard surface roads. 10 miles at 15 miles per hour, over dirt roads. 5 miles at10 s. IIammering to shape, salvage operations (including repair by welding) or other similar prartices shall not be permitted
24、without prior approval of the contracting officer. 10 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-, MIL-H-955bA 10 7797706 0308025 5 m I MIL-H-4 5 586A AGENCY IDEMIFtCATION -INCH LE3TirlS BOTH SIGES Agency identification Tire pressure Color: Lust
25、erless white #37855 Color: Lusterless white /37875 Location: As illustrated Location: Any visible portion of the wheel support arm will consist of numerals Veight classification htters and numerals: The marking ?Tumber: 2 representing the proper C-rlor: Lusterless black number (2) tire pressure prec
26、eded -#37033 on a six-inch diameter backgound of lusterless yellow Size: Letters and numerals will #33538 be one inch just to the rear of the traversin? hanwheel by the letters TP Location: kft side of the box trail General data Narkings shall be applied using stencil. paint in accordance with TT-P-
27、98 or pressure sensitive adhesive materials in accordance with MIL-M-43719. All letters and numerals shalE be of the gothic style and of the maximum practical size unless otherwise specified. Colors shall be as specified in accordance with FED-STD-595 (see 6.3) Figure 1, Size and location of markiws
28、 for 105-mm light towed howitzer M.02 11 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-4. QUALITY ASSURANCE PROVISIONS 4.1 Responsibility for inspection. Unless otherwise specified in the contract or purchase order, the supplier is responsible for
29、the per- formance of all inspection requirements as specified herein. Except as otherwise specified in the contract or order, the supplier may use his own or any other facilities suitable for the performance of the inspec- tion requirements specified herein, unless disapproved by the Government. Fne
30、 Government reserves the right to perform any of the inspections set forth in the specification where such inspections are deemed necessary to assure supplies and services conform to prescribed requirements. 4.2 Quality assmance terms and definitions. Quality assurance terms and definitions used her
31、ein are in accordance with MIL-STD-109. 4.3 Classification of inspection. The inspection requirements specified herein are classified as follows: a. b. First article inspection (see 4.4). Quality conformance inspection ( see 4.5). 4.4 First article inspection. The first article (initial prouc- tion
32、unit(s) shall be submitted for inspection in accordance with the contract (see 6.2). production processes to be used during quantity production. The first article shall be subjected to the quality conformance inspection spec- ified herein and such other inspections as necessary to determine that all
33、 the requirements of the contract have been met. The first article shall be representative of the 4.5 Quality conformance inspection. 4.5.1 Inspection lot. Unless otherwise specified herein, the formation, size and presentation of inspection lots of howitzers and parts shall be in accordance with MI
34、L-STD-105. assembled from lots of component parts that have met all inspection require- ments specified herein. Howitzers shall be 4.5.2 Examination. 4.5.2.1 Component parts and concurrent repair part s. Examination of component parts and concurrent repair parts shall be performed in accordance with
35、 the criteria specified in the contract (6.2) contractors examination of these parts shall be accomplished prior to their assembly into the end item or submission for acceptance as repair parts. The 12 - Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-
36、,- MIL-H-4558bA 10 7777706 0308027 7 4.5.2.2 Howitzers. Visually and manually exa.ne each hottiteer to determine conformance Wth the applicable requirements. Each step in te exmina;tion sall include a visual examination for proper cleaning, the presence of the specified protective coating, and to de
37、termine the %eneral quality, completeness of mufacture, assembly, and workmanship. %e exanination provisions shall be applied at the earliest practical- point in manufacture at which it is feasible to inspect for acceptance without risk of change in the characteristic by subsequent operations. tions
38、 of these characteristics on the completed product is not required provided assurance exists that the characteristic has not been changed, degraded or damased by subsequent mmufacturing, assembly or handling, and that adequate inspection records axe maintained. meet the requirements shall be rejecte
39、d. Beinspec- Eovitzers failing to 4.5.2.2.1 Parts and assex6blies. Parts and assemblies shall be visually and manually examined to determine compliance with the materials, construction and design requirements of 3.2 and the applicable require- ments of 3.2.ltbrough 3.2.7 using the following examinat
40、ion md test specified in 4.5.2.2.1.1 through 4.5.2.2.1.8. components shaL1 be in accordance with MIL-H- or MIL-E-6975, as applicable. 4.5.2.2.1.3 Heat treatment. Exainination and tests of heat treated 4.5.2.2.1.2 Welds and welding. Examination and tests of welded parts and welding procedure for the
41、paxk- ing brakes shail be disengaged; and the wheel locking pins removed. A torque measuring device shall be used to measure the torque required to lower the weapon to firing position, and raise the weapon to travel po- sition, the operator shal stop cranking for a period of one minute 210 seconds a
42、t any three given points (two points while the firing platform is off the ground and one point when the firing platform is on the ground) in the lowering and in the raising operation, to determine self-locking char- acteristics of the actuator (see 3.3.2.7). The During the cranking operation of lowe
43、ring and raising the weapon, 4.6.3 Fire control tests. 4.6.3.1 Fire control instruments, The following fire control test equipment shall be used. a. b. Mechanical jacks for leveling the carriage trunions. A plumb line approximately 1/16 inch in diameter shali be suspended less than 12 inches fromthe
44、 end of the cannon tube. The line shall be shielded from wind currents and the plumb bob SU be immersed in a container of oil to act as a dam- pener C. A boresight target SU be constructed on non-warping and non-shrinking material (Figure 2). mace the taxget 50 feet - + 6 inches from the fire contro
45、l instruments in a plane per- pendiculw to the cannon bore at zero weapon elevation. The reference line on the target shall be pumb. the target above ground shalu be such that at zero elevation, the centerline of the casmon bore shall faU on the cannon aiming point within plus or minus 1/8 inch. The
46、 height of 18 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-H-4558bA LO 779770b O308033 4 d, An approved borescope shall be used. scope with a cross hair reticle mounted in 2 self 6U.gning adapter to be inserted in the Sreech of the cannon so t
47、hat the crosshairs of the telescope shdl have Q separate focus for reticle and field and be adjustable from 5 to 5,000 yards. The reticle of tbe telescope shall be collimated with re- spect to the outside diameter of the adapter within 0.1 mil. The telescope shaU have a magnification of h or higher.
48、 Parallax shields (peep sight) with a centrally located 1/16 inch minuni diameter hole, shall be placed over the eye- piece of the panoramic telescope and eov telescope to el2ninate parallax. This shaU. be a tele- e. 153.2 ?ire control, checks ad ajustments, a. The carriage trunnion shall be cross-l
49、eveled so that the cannon tube trill track tine plumb line within 0.3. mil through the full elevation. jacks and the borescope (see 4.6.3.1(d) inserted in the breech and setting the muzzle cross hairs (.O3 -k .O1 dia) on the center of the p1U;no line at zero weapon ele6ation. cannon tube shouid be elevated to approximate maximum eleva- t is determined by sighti
