1、m-c-45526B( WC ) supERSm1m 19 JULY 1972 MIL-C-45526A(WC) i5 October 1968 AMENDMEML 1 20 November i968 . MILITARY SPECIFICATION * CANNON, 105MM HWITZER: KLO3 1, SCOPE 1.1 This specification covers one type of howitzer cannon. 2, APPLICABLE D0CuME“S 2.1 The following documents, of the issue in effect
2、on date of invitation for bids or request for c pecified her ein. SFECEICATIONS I I Military MIL-C -13 931 NIL-1-45607 STANDARDS Military MIL-STD-109 proposal, form a part of this specification to the extent Cannons, General Specification for Inspection Equipent Acquisition, Maintenance, and Disposi
3、tion of . Quaiity Assurance Terms and Definitions MIL-STD-1235 - Single and Miltilevel Continuous Sampling Procedures and Tables for Inspection by Attributes PUBLIC ATIONS u. s, Arms Weapons Command EPL 8768965 - Engineering Parts List for Cannon, 105MM Howitzer: Master EQAP 8768965 - Master List of
4、 Supplementary Quality Assurance DL 8768963 - List of Inspection Equipment for Cannon, 105MM Howitzer: PDS P768965 - Packaging Data Sheet, Cannon, 105MM Howitzer: (Copies of specifications, Standards, drawings and publications required by suppliers in connection with specific procurement functions s
5、hould be obtained from the procuring activity or as directed-by the contracting officer.) NO3 Provisions for Cannon, 105MM Howitzer : KLO3 Klo3 Ml03 -ni. / FSC .O.5 n THIS DOCUMENT CONTAINS 7 PAGES. Y .r Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-
6、,- M.XL-C-4552bB LO 7777706 030782-4 a D 3.1 First article. When specified in the contract, the contractor shall submit a first article. be included in the pilot pack (see 5.1). Unless otherwise apeciiied (see 6.1*1), the first article shali 3.2 General requirements. Cannons and parts thereof shall
7、conform to the draw- ings listed in Engineering Parts List 8768965 and the requirements of this spec- ification and MIL-(2-13931. 3.3 Functioning. Ali parts shall function smoothly without interference or erratic movement . 3.3.1 Breech mechanism. Cainming of the operating-crank during counterrecoil
8、 or remar rotation of the opersting-handle shall rotate the breechblock crank rearward and downward kc, nears the opened position, V:.: lips of the extractors shall rotate sharply rear- ward to extract the cartrid- ;ase. The extractors shall then lock the breech- block in the opened positit -uitil t
9、ripped, normally by insertion of a cartridge, The breech mechanism, with the closing-spring-adjustor set for minimum preload, shall. then raise the brevzhblock to the closed position. Counterclockwise rotation of the adjustor shall increase the preload of the closing spring. 3.3.2 Firinn mechanisin
10、gr ou. cocking lever, forced by a cdng surface on the breech ring, shall engage the retractor. This engagement shall force the percussion mechanism rearward. The firing spring shai then compress and cause the sear to latch the percussion mechanism in the cocked position. pivots the trigger. The sear
11、 shall then rotate and release the percussion mechanism. This releases the compressed firing spring which shall drive the firing pin forward. The firing pin shall strike the cartridge primer and sim- ultaneously compress the firing pin retracting spring. spring shall then withdraw the firing pinbehi
12、nd the front face of the breech- block. swer the breechblock. When the breechblock During the dropping of the breechblock, the Rearward movement of the trigger plunger The expanding retracting 3.3.3 Firine pin protrusion. The firing pin protrusion, measured from the front face of the breechblock, sh
13、all be not less than 0.10 inch nor more than 0.16 inch when the breechblock is in the firing position. 3.3.4 Firinn mechanism overtravel. Overtravel of the firing mechanism in cocking shall be not less than 0.05 inch. 3.3.5 Headspace. and locked breechblock and the rear face of the tube, shall be no
14、t less than 0.188 inch nor more than 0.206 inch. Headspace, the distance between the front face of the closed 3.4 Performance. 2 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-1-45526B( WC ) 3.4.1 High pressure resistance. of withstanding U3 k 4 per
15、cent of the 39,000 pounds per square inch upper pressure limit at 70% when tested as specified in 4.5.4. 3.4.2 Material soundness. and fractures and shall comply with aay soundness requirements specified on the applicable drawings. 3.4.3 Rore enlargement. If proof firing is used to evaluate high pre
16、ssure resistance, bore diameters, measured across the lands after proof firing no more than 8 rounds, shall not exceed the basic (minimum) diameter specified on the applicable drawing by more than the amount specified in Table I. The cannons and repair tubes shall be capable After testing, all parts
17、 shaU be free fm cracks I Table I Bore enargement 2 cals. Distance forward of commencement of rifliq 0.1 inch 1 inch 1 cal. to muzzle Amount (inches) 0.008 0.008 0.006 0.003 - NOTE: Tnterpolate to determine the amount between given distances. 3.5 Worhanshig. Worbanship shall be as required in MIL-C-
18、13931. 4. QUALITY ACSURANCE PROVISIONS 4.1 Responsibility for inspection. Unless otherwise specified in the contract or purchase order, the supplier is responsible for the performance of all inspectinn requirements as specified herein. the contract or order, the supplier may use his own or any other
19、 facilities suitable for the performance of the inspection requirements specified herein, unless disapproved by the Government. The Government reserves the right to perform any of the inspections set forth in the specification where such in- spections are deemed necessary to assme that supplies and
20、services conform to prescribed requirements. Except as otherwise specified in 4.2 Quality assurance terns and definitions. Quality assurance tems and definitions shaU. be as specified in MIL-STD-109. 4.3 Classification of inspection. The inspection requirements specified herein are classified as foL
21、ows: a. First article inspection (see 4.4) b, Quality confonnance inspection (see 4.5) 4.4 First article inspection. (in accordance with the contract requirements). representative of the production processes to be used during qumtty produc- tion. tion specified berein and such other inspection as is
22、 necessary to determine compliance with the requirements of the contract. A first article shall be submitted for inspection The first article sha3L be The first asticle 6haU be subjected to the quality conformance inspec- 3 Provided by IHSNot for ResaleNo reproduction or networking permitted without
23、 license from IHS-,-,-t RIL-C-V552bB LO 799990b 0307826 IJ Mer testing and prior to preservation and packaging to determine compliance with this specification, MLL-C-13931, and as specified in the contract. Final examination of each cannon shall be ccsnpleted 4.5.1.2 inspection approval stq. The app
24、lication of the inspection approval stamp shall be as specified in MIL-C-13931. 4.5.2 Inspecton equipnent. tion of parts, sub-assemblies, and assemblies are listed in DL 8768965. Data lists containing equipnent used in the inspec- 4.5.2.1 Acquisition, maintenance, and disposition. Unless otherwise s
25、pecified, responsibility for acqulsition, maintenance, and disposition of acceptance inspection and test equpnent prescribed in the List of Inspection Equipment DL giT68965, and for all other inspection equi-Ement required to perform inspec- tion prescribed by applicable specifications, shall be in
26、accordance with MIE S-45607. 4.5.2.2 Accuracy of standard measuring equlpuent. When camnercial and modified comercial, inspection and test equipnent is used, it shall be capable of repeti- tive measurements to a.n accuracy of 10 percent of the total tolerance of the characteristic being inspected. 4
27、.5.3 Examinations. 4.5.3.1 Firing pin protrusion. cannon With Gage 7248891 or an approved equivalent gage. checked visualy. rejected. 4.5.3.2 Firing mechanism overtravel. Firing mechanim overtravel shall be gaged on each breechblock before insertion in the breech ring. measured with Gage 3773831 or
28、an approved equivalent gage. as follows: the mechanism until the sear locks the firing mechanism. lever to return to its forward position. zero. with the frontface of the breechblock guide surfaces. this position is the measurement of minimum overtravel. the requirements of 3.3.4 shall be rejected.
29、and 773819 or with approved equivalent gages. quirements of 3.3.5 shall be rejected. 4.5.3.4 Worhmanship. Workmanship shall be examined in accordance with MIL-C-13931. 4.5.3.5 Preparation for delivery. The c&issification of defects and the AQLs for examination of the packaging, packing, asd marking
30、are as follows: Firing pin protrusion shall be gaged on each &traction shall be Cannons failing to meet the requirements of 3.3.3 shall be Overtravel shall be Remove the firing spring retainer, Insert the gage and hand cock Puu, the cocking lever rearward until the lever cam surface is in line Proce
31、dure shall be AUow the cocking Set the dial indicator of the gage to The indicator reading at Cannons failing to meet . 4.5.3.3 Headspace, Headspace shall be gaged on each cannon with Gages 8173818 Cannons failing to meet the re- 4 Provided by IHSNot for ResaleNo reproduction or networking permitted
32、 without license from IHS-,-,-I m-C-45526B( WC ) Catego= Defect - ACJ& insp. Method &.lor 101 Illegible or incorrect marking 1.0 visual 102 Improper level of preservation, packaging, 1.0 visual or packing 103 Inadequate cleaning or drying 1,5 Visual 104 Improper pres ervative application 1.5 Visual
33、1.5 Visual 105 Hissing or improper cushioning 3.06 Improper blocking or bracing 1.5 Visual/Manual 107 improper closure or strapping of container L5 Visual/%a.nual - Minor 201 Workmanship 4.0 Visual 4.5.4 Tests. 4.5,4.1 Functioning. ness of operation. and breech mechanism operation tests shall. be pe
34、rformed to ascertain proper functioning. and with the cannon in a horizontal position. requirements shall be rejected. Each cannon shall be operated manually to test smooth- Cocking action, trigger actuation, firing mechanism action, Extraction shall be tested With an empty service cartridge case Ca
35、nnons failing to meet the l+,5,4,2 Performance. 4.!5.4,2e1 Actual firing. Unless otherwise specified in the contract each cannon or repair tube shall be subject to actual firing by Government personnel ot a proving ground designated by T3COT.I. Unless otherwise specified in the contract, the cannon
36、or repair tube firing schedule sh3U consist of firing one round of munition which produces 113% f 4% of tne U% (Upper Pressure Limit). shall be at an AQL of 0.10% in accordance with MIL-STbl235. Unless otherwise specified in the contract, sampling for repair tubes (see 6.1.1). 4.5,4.2.2 SWated firin
37、Ff. When specified in the contract (see 6.1.1), breech mechanism shaU be subjected to simulated firing in accordance k5th procedures specified in the contract. 4.5.4.2.3 Material soundness. be examined visually for freedom from cracks, fractures, ar-d other defects. Furfthemore, the breechblock, bre
38、echring, evacuator chamber, sr,d the outer cur- faces of the tube shall be magnetic particle tested in accordance with the applicable part drawing and specification. The inner surfaces of the tube shal be examined by means of a borescope. Any evidence of cracks or fractures shall be cause for reject
39、ion, After firing, each cannon or repair tube shal 5 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-4.5.4.2.4 Bore enarEement. meter across the lands of each cannon or repair tube shall be measured with an air gage, a star gage or other approved gag
40、e. Measurements shall be recorded. Enlargements exceeding the Units specified in Table I shall be cause for re- jection. 4.5.4.2.5 Records. Cannons or repair tubes that pass the firing tests shall be furnished with applicable data on DA Form 2408-4 by the proving ground. pair tubes accepted on a pro
41、of sampling basis shall be furnished with applic- able data on DA Form 2408-4 bF the contractor and approved by the Government representative. tubes which fail the firing tests shall be as specified in the contract. 5. PREPARATION FOii IELNERP After firing no more than 8 rounds, the bore dia- Re- Th
42、e responsibility of the contractor for cannons or repsir 5.1 Pilot Pack. On each contract, a pilot pack sha be forwarded in accor- dance with 3.1. pilot packs for the cannon shall be packaged to the level of packaging specified in the contract and packed level C in accordance with the requirements o
43、f Packaging Data Sheet F768965. 5.2 Preservation, packaRina, and marking. The cannon shall be unit packaged, packed, and marked in accordance with the requirements of Fach ing Data Sheet F8768965 for the level of protection specified in the contract ?see 6.1). 5.3 RePair Dart s. accordance with the
44、requirements of the applicable packaging data sheet (see 6.i.i). Repair parts shall be unit packaged, packed and marked in 6 NOES 6.1 Ordering data. Procurement documents should specify the following: 6.1.1 Procurement reauirements . a. b. Title, number, and date of this specification. Requiremefits
45、 for submission of and shipping instructions for first article (see 3.1 and 4.4) and pilot pack, if different (see 3.1 and 5.1). The contract should designate the examinations and tests to be performed by the contractor and the examinations and tests to be performed by the Government. units) of the
46、first article. (1) (2) The contract should specify the sample size (Le., the number of (3) The contract should designate the inspection and test data that is required to be furnished the Goverment when the contractor is required to perform either or both examinations and tests. The contract should d
47、esignate at whose expense a retest may be perforhad. (4) =- 6 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-I (5) The contract should specify that the acceptable first article sample shall be delivered in accordance with the terma of the contract,
48、or (6) aitiona or extended examinations and tests beyond the scope of this specification shall be specified and identified as a separate item of the contract , c. Serial numbers for the cannons and tube assemblies. d, List of inspection equipment, responsibility for acquisition, main- tenance, and d
49、isposition thereof, if other than as specified (see 4.5.2). e. Extent of supplierts responsibili3y for Goverment-furnished equipent. f. Selection of applicable level of preservation, packaging, and packing (see 5.2). g. h, Packaging instructions for repair parts (see 5.3). The contract should specify under what conditions simulated firing be performed, the test equipment available, and the procedures to be followed. i. When applicable
