1、 MIL-DTL-13791G 25 February 2009 SUPERSEDING MIL-D-13791F 10 June 1988 DETAIL SPECIFICATION DISTRIBUTOR, IGNITION SYSTEM: INTEGRAL COIL, WATERPROOF 24 VOLT This specification is approved for use by all Departments and Agencies of the Department of Defense. 1. SCOPE 1.1 Scope. This specification cove
2、rs waterproof ignition distributor assemblies with integral ignition coil and authorized repair parts. These ignition distributor assemblies are designed to operate in 24 volt (V) direct current (dc) electrical systems and are of breaker point or breakerless design. Ignition distributor assemblies s
3、hould be referred to herein as “distributors”. 1.2 Classification Distributors should be classified by type and class as follows (see 3.3.1, 6.2 and 6.3). Classification Description Drawing No. Type I Left hand (counterclockwise) rotation viewing Drive-end 7355734, 7762671, 7762685,12259526 Type II
4、Right hand (clockwise) rotation viewing Drive-end 7353276, 7355596, 7358569, 7374377, 10863489 Class 1 1/ Breaker point design Class 2 1/ Breakerless design 1/ See 3.3.1, 6.3.3 and 6.3.4. 2. APPLICABLE DOCUMENTS 2.1 General. The documents listed in this section are specified in sections 3, 4, or 5 o
5、f this specification. This section does not include documents cited in other sections of this specification or recommended for additional information or as examples. While every effort has been made to ensure the completeness of this list, document users are cautioned that they must meet all specifi
6、ed requirements of documents cited in sections 3, 4, or 5 of this specification, whether or not they are listed. 2.2 Government documents. 2.2.1 Specifications, standards, and handbooks. The following specifications, standards, and handbooks form a part of this document to the extent specified herei
7、n. Unless otherwise specified, the issues of these documents are those cited in the solicitation or contract. Comments, suggestions, or questions on this document should be addressed to: (Defense Supply Center, Columbus, DSCC-VAI, 3990 East Broad Street, Columbus, OH 43218-5000), or emailed to, Flui
8、dFlowdscc.dla.mil. Since contact information can change, you may want to verify the currency of this address information using the ASSIST Online at http:/assist.daps.dla.mil. INCH-POUND AMSC N/A FSC 2920 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-
9、,-MIL-DTL-13791G FEDERAL STANDARDS FED-STD-H28/2 - Screw -Thread Standards for Federal Services, Section 2, Unified Inch-Screw Threads UN and UNR Thread Forms COMMERCIAL ITEM DESCRIPTION A-A-50271 - Plate, Identification, Instruction and Marking, Blank. DEPARTMENT OF DEFENSE STANDARDS MIL-STD-130 -
10、Identification Marking of US Military Property. MIL-STD-202 - Test methods for Electronic and Electrical Component Parts. MIL-STD-461 - Electromagnetic Emission and Susceptibility Requirements for the Control of Electromagnetic Interference. (See supplement 1 for list of specification sheets.) (Copi
11、es of these documents are available online at http:/assist.daps.dla.mil/quicksearch or from the Standardization Document Order Desk, 700 Robbins Avenue, Building 4D, Philadelphia, PA 19111-5094.) 2.2.2 Other Government documents, drawings, and publications. The following other Government documents,
12、drawings, and publications form a part of this document to the extent specified herein. Unless otherwise specified, the issues of these documents are those cited in the solicitation or contract (see 3.3.1). ARMY DRAWINGS: 5701239 - Ignition Distributor Contract Set. 7348578 - Ignition Distributor Ro
13、tor. 7353276 - Ignition Distributor Assembly. 7355596 - Ignition Distributor Assembly. 7355734 - Ignition Distributor Assembly. 7358569 - Ignition Distributor Assembly. 7374377 - Ignition Distributor Cap Assembly. 7374880 - Ignition Distributor Cap. 7374883 - Ignition Distributor Cap Cover. 7375373
14、- Ignition Distributor Cap Cover. 7539588 - Ignition Distributor Rotor. 7727531 - Gap, Sparking. 7762671 - Ignition Distributor Assembly. 7762685 - Ignition Distributor Assembly. 8722526 - Ignition Distributor Cap. 10863489 - Retainer bearing. 11640924 - Ignition Distributor Contact Set. 11663066 -
15、Ignition Distributor Coil. 12259526 - Ignition Distributor Assembly. (Copies of these documents are available online at http:/www.dscc.dla.mil/programs/milspec/ or from the Defense Supply Center Columbus, ATTN: VAI, P.O. Box 3990, Columbus, Ohio 43218-3990.) 2Provided by IHSNot for ResaleNo reproduc
16、tion or networking permitted without license from IHS-,-,-MIL-DTL-13791G 2.3 Non-Government publications. The following documents form a part of this document to the extent specified herein. Unless otherwise specified, the issues of these documents are those cited in the solicitation or contract. AE
17、ROSPACE INDUSTRIES ASSOCIATION (AIA) NASM35206 - Screw, Machine Pan Head, Cross-Recessed Carbon Steel, Cadmium Plated, UNC-2A. (Copies of these documents are available online at http:/www.aia- or from the Aerospace Industries Association, 1000 Wilson Boulevard, Suite 1700 Arlington, VA 22209-3928 AS
18、TM INTERNATIOINAL (ASTM) ASTM-B117 - Salt-Spray (Fog) Testing ASTM-B633 - Standard Specification for Electrodeposited Coatings of Zinc on Iron and Steel ASTM-B695 - Standard Specification for Coatings of Zinc Mechanically Deposited on Iron and Steel ASTM-G21 - Materials To fungi, Synthetic Polymeric
19、, Determining Resistance Of (Copies of these documents are available from http:/www.astm.org or ASTM International, P.O. Box C700, 100 Barr Harbor Drive, West Conshohocken, PA 19428-2959.) SAE INTERNATIONAL SAE-AMS-C-81562 - Coatings, Cadmium, Tin-Cadmium and Zinc (Mechanically Deposited) SAE-AMS-QQ
20、-P-416 - Plating, Cadmium (Electrodeposited) SAE-AMS2700 - Steels, Passivation of Corrosion Resistant (Copies of these documents are available online at http:/www.sae.org or from the SAE World Headquarters, 400 Commonwealth Drive, Warrendale, PA 15096-0001.) 2.4 Order of precedence. Unless otherwise
21、 noted herein or in the contract, in the event of a conflict between the text of this document and the references cited herein (except for related specification sheets), the text of this document takes precedence. Nothing in this document, however, supersedes applicable laws and regulations unless a
22、 specific exemption has been obtained. 3. REQUIREMENTS 3.1 Specification sheets. The individual item requirements shall be as specified herein and in accordance with the applicable specification sheet. In the event of any conflict between the requirements of this specification and the specification
23、sheet, the latter shall govern. 3.2 First article. When specified (see 6.2), a sample shall be subjected to first article inspection in accordance with 4.4. 3.2.1 Distributors. Unless otherwise specified (see 6.2), the contractor shall furnish distributors which shall be subjected to first article i
24、nspection (see 4.4). First article inspection samples, properly marked with identifying information will be representative of the distributors to be furnished to the Government. All subsequent units delivered to the Government must conform to these samples in all of their pertinent physical and perf
25、ormance attributes. 3Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-DTL-13791G 3.2.3 Authorized repair parts. Unless otherwise specified (see 6.2), the contractor will furnish authorized repair parts (see table I) which shall be subjected to fir
26、st article inspection (see 4.4). First article inspection samples, properly marked with identifying information will be representative of the distributors to be furnished to the Government. All subsequent units delivered to the Government must conform to these samples in all of their pertinent physi
27、cal and performance attributes. 3.2.3.1 Separate repair parts. Repair parts submitted separately for first article inspection shall be individually assembled with all other parts necessary to form a complete distributor assembly. TABLE l. Authorized repair parts. Drawing Title 5701239 7348578 737488
28、0 7374377 7374883 7375373 7539588 7762685 7727531 8722526 8722527 11640924 116623066 NASM35206 MS51114 MS51115 Ignition distributor contact set Ignition distributor rotor Ignition distributor cap Ignition distributor cap Ignition distributor cap cover Ignition distributor cap cover Ignition distribu
29、tor rotor Ignition distributor assembly Gap, sparking Ignition distributor cap Ignition distributor rotor Ignition distributor contact set Ignition distributor coil Screw, machine-pan head, cross-recessed, carbon steel, cadmium plated, UNC-2A Coil, Ignition - 24 Volt, DC (with Internal Ballast) Coil
30、, Ignition - 24 Volt DC (Without Internal Ballast) 3.2.3.2 Assembled repair parts. Repair parts contained within distributor assemblies, which have successfully met first article requirements, must also have successfully completed first article inspection. 3.3 Materials. Materials must be as specifi
31、ed herein and in referenced specifications, standards, and drawings (see 4.10.1). 4Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-DTL-13791G 3.3.1 Slash sheet reference specification. Army drawing number Slash sheet reference 7355734 MIL-DTL-137
32、91/1 7762671 MIL-DTL-13791/2 7762685 MIL-DTL-13791/3 12259526 MIL-DTL-13791/4 7353276 MIL-DTL-13791/5 7355596 MIL-DTL-13791/6 7358569 MIL-DTL-13791/7 7374377 MIL-DTL-13791/8 5701239 MIL-DTL-13791/10 7348578 MIL-DTL-13791/11 7374880 MIL-DTL-13791/12 7374883 MIL-DTL-13791/13 7375373 MIL-DTL-13791/14 7
33、539588 MIL-DTL-13791/15 7727531 MIL-DTL-13791/16 8722526 MIL-DTL-13791/17 11640924 MIL-DTL-13791/19 11663066 MIL-DTL-13791/20 10863489 MIL-DTL-13791/21 NASM35206 MIL-DTL-13791/22 3.3.2 Cadmium is not recommended. It is recommended that the use of carbon steel material with cadmium plating be used on
34、ly when the other materials and plating finishes specified in this document cannot meet performance requirements (see table ll). 3.3.2.1 Protected plating. Proper protected coating type plating shall be in accordance with SAE-AMS-C-81562, type II, class 3 or SAE-AMS-QQ-P-416, type II class 2. Fluid
35、passages, other openings, and internal threads shall not be subject to the plating thickness requirement and may have bare areas provided they are protected with a light film of oil. TABLE ll. Material and finish. 1/ Material Finish Cadmium plating in accordance with SAE-AMS-C-81562, type II, class
36、3 or SAE-AMS-QQ-P-416, type II, class. 2/ Carbon Steel Zinc plating in accordance with ASTM-B633; type II or III, Fe/Zn 25, or ASTM-B695, type II, class 5. 3/ 300 series stainless steel No additional finish. Passivation in accordance with SAE-AMS2700, type 6 or 7. 1/ Must be capable of withstanding
37、96 hours salt spray. 2/ Not recommended for use where severe abrasion conditions exist. Max service temperature 120C. 3/ Embitterment test need not be run. 3.3.3 Recycled, virgin, and reclaimed materials. There are no requirements for the exclusive use of virgin materials. The use of recycled or rec
38、laimed (recovered) materials is acceptable provided that all other requirements of this specification are met (see 4.10.1 and 6.3.5). 3.3.3.1 Recycled, recovered, or environmentally preferable materials. Recycled, recovered, or environmentally preferable materials should be used to the maximum exten
39、t possible, provided that the material meets or exceeds the operational and maintenance requirements, and promotes economically advantageous life cycle costs. 5Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-DTL-13791G 3.4 Design and construction
40、. Distributors shall conform to applicable drawings and standards for type and class (see 1.2). Authorized repair parts will conform to the form and dimensions specified on the drawings specified in table I (see 3.3.1, 4.10.1, 4.10.2 and 6.2). 3.4.1 Interchangeability. All distributor assemblies and
41、 authorized repair parts shall be physically and functionally interchangeable with all other products of the same part number (see 4.10.1 and 4.10.2). 3.4.2 Housing. Distributor housing shall be so constructed as to be electrically continuous (see 4.10.2). 3.4.2.1 Coil-to-distributor lead. When spec
42、ified (see 6.2), provision shall be made to permit connection to coil-to-distributor lead for testing purposes (see 4.10.1 and 4.10.2). 3.4.3 Timing: initial setting. Timing of distributor shall be accomplished by rotation of the complete distributor assembly in its mounting (see 4.10.2). 3.4.3.1 Ad
43、vance and retard. Spark advance mechanism will be centrifugal. The centrifugal spark advance mechanisms must continuously adjust timing of voltage output at the spark gap in conformance to the advance curve specified on applicable drawings or military standards (MS) (see 4.10.1 and 4.10.2). 3.4.4 Dr
44、ive arrangement. Distributor shaft speed will be one-half crankshaft speed. Drive end of the shaft will be designed so that mating parts will not be assembled 180 degrees () out of line (see 4.10.2). 3.4.5 Ventilation. Provision will be made for ventilation as specified on applicable drawing or MS s
45、heet (see 4.10.1 and 4.10.2). 3.4.6 Lubrication. The breaker cam follower will be designed so that no additional lubrication will be required when operation time is less than 100 hours. The rotor shaft bearing must be designed so that no additional lubrication will be required when operation time fo
46、r class 1 distributor is less than 600 hours and when operation of class 2 distributor is less than 1500 hours (see 4.10.2). 3.4.7 Threaded parts. Screw threads of the form, number per inch, and class specified on the applicable drawing or MS sheet must be in accordance with FED-STD-H28/2 (see 4.10.
47、1 and 4.10.2). 3.5 Performance. 3.5.1 Voltage output. The distributor will produce no less than minimum voltage output at each output terminal under operating conditions specified in table llI. Variation of output voltage from output terminal to output terminal will be no more than 10 percent (%). W
48、hen operating, the distributor will produce no less than 6000 V dc at output terminals. The distributor must then be operated for 3 hours at 300 revolutions per minute (rpm) and 3 hours at 1800 rpm. Thereafter, the distributor cap will be examined and there will be no evidence of cap and rotor interference (se
