1、INCH-POUNDMIL-DTL-11891G(AT)25 February 1998SUPERSEDINGMIL -PRF-11891F(AT)16 February 1996DETAIL SPECIFICATIONTRACK SHOE SETS, TRACK SHOE ASSEMBLIES, TRACK SHOEPADS AND TRACK SHOE BUSHINGS, VEHICULAR: ELASTOMERIZEDThis specification is approved for use by U.S. Army Tank -automotive and ArmamentsComm
2、and, Department of the Army, and is available for use by all Departments andAgencies of the Department of Defense.1. SCOPE1.1 Scope . This specification identifies the requirements for qualification and productioncontrol of track systems supporting U.S. Military Tracked Vehicles. This specification
3、is intendedprimarily for the qualification of elastomeric compounds used in the fabrication of track and trackcomponents and to ensure that the quality and performance established at qualification ismaintained throughout production. The contractor is held fully responsible for the entireassembly/com
4、ponent including all non-elastomeric components and fasteners. The qualifiedproducts list (QPL) is divided by individual track components (pads, bushings and roadwheelpath/shoe body) listing the contractors qualified to produce the various components, thecontractors address, and compound identificat
5、ion. The QPL also identifies contractors qualifiedto assemble the various track components into full assemblies/systems. This includes bushinginsertion, pad installation and connecting component (end connectors, center guides) assembly. The track shoe assemblies may be acquired either as sets, assem
6、blies or as individual components(pin bushing assemblies or pads) as specified by the acquiring activity (see 6.1).Beneficial comments (recommendations, additions, deletions) and any pertinent data which maybe of use in improving this document should be addressed to: U.S. Army Tank -automotive andAr
7、maments Command, ATTN: AMSTA -TR -E/BLUE, Warren, MI 48397 -5000, by using theStandardization Document Improvement Proposal (DD Form 1426) appearing at the end of thisdocument, or by letter.AMSC N/A FSC 2530DISTRIBUTION STATEMENT A . Approved for public release; distribution is unlimited.Provided by
8、 IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-DTL-11891G(AT)21.2 Classification . The track shoe assemblies or components to be procured inaccordance with this specification are of the following types and styles:Type I.Single-pin track shoeStyle AIntegral
9、 padStyle BReplaceable padType IIDouble-pin track shoeStyle A.Integral padStyle BReplaceable padType III.Bushing assemblies1.3 Track systems . Applicable track systems are as follows:Designation Type / style TDP no.T142 (see note 1) II / B 11645125T107 I / A 8705914T154 II / B 12268550T136 II / B 10
10、954051T130E1 I / B 11677988T138 I / A 10948405T132E1 I / B 10934639T144 II / A 10892811T164 I / B 12352500T150 II / B 12306600T157I I / B 12359466NOTE: The T142 track block elastomer must be produced in accordance with Drawing11645127 and is exempt from the requirements of this specification exceptw
11、here noted on the drawing.2. APPLICABLE DOCUMENTS2.1 General . The documents listed in this section are specified in sections 3 and 4 of thisspecification. This section does not include documents cited in other sections of this specificationor recommended for additional information or as examples. W
12、hile every effort has been made toensure the completeness of this list, document users are cautioned that they must meet allspecified requirement documents cited in sections 3 and 4 of this specification, whether or notthey are listed.Provided by IHSNot for ResaleNo reproduction or networking permit
13、ted without license from IHS-,-,-MIL-DTL-11891G(AT)32.2 Government drawings . Technical data package (TDP) drawings for the tracksystem/component to be procured will be provided as a part of the invitation for bid.2.3 Non-Government publications . The following documents form a part of thisdocument
14、to the extent specified herein. Unless otherwise specified, the issues of the documentswhich are DoD adopted are those listed in the issue of the Department of Defense Index ofSpecifications and Standards (DoDISS) cited in the solicitation. Unless otherwise specified, theissues of documents not list
15、ed in the (DoDISS) are the issues of the documents cited in thesolicitation (see 6.2).AMERICAN SOCIETY FOR TESTING AND MATERIALS (ASTM)ASTM D395 - Standard Test Methods for Rubber Property -Compression Set (DoD Adopted).ASTM D412 - Standard Test Methods for Vulcanized Rubber andThermoplastic Rubbers
16、 and Thermoplastic Elastomers -Tension (DoD Adopted).ASTM D429 - Standard Test Methods for Rubber Property - Adhesionto Rigid Substrates (DoD Adopted).ASTM D518 - Standard Test Method for Rubber Deterioration - SurfaceCracking (DoD Adopted).ASTM D573 - Standard Test Method for Rubber - Deterioration
17、 in anAir Oven (DoD Adopted).ASTM D792 - Standard Test Methods for Density and Specific Gravity(Relative Density) of Plastics by Displacement(DoD Adopted).ASTM D1149 - Standard Test Method for Rubber Deterioration - SurfaceOzone Cracking in a Chamber (DoD Adopted).ASTM D2084 - Standard Test Method f
18、or Rubber Property -Vulcanization Using Oscillating Disk Cure Meter(DoD Adopted).ASTM D2137 - Standard Test Methods for Rubber Prop erty - BrittlenessPoint of Flexible Polymers and Coated Fabrics(DoD Adopted).ASTM D2240 - Standard Test Method for Rubber Property - DurometerHardness (DoD Adopted).AST
19、M D3182 - Standard Practice For Rubber - Materials, Equipment, andProcedures for Mixing Standard Compounds andPreparing Standard Vulcanized Sheets (DoD Adopted).ASTM D3183 - Standard Practice for Rubber - Preparation of Pieces forTest Purposes from Products (DoD Adopted).Provided by IHSNot for Resal
20、eNo reproduction or networking permitted without license from IHS-,-,-MIL-DTL-11891G(AT)4ASTM E1131 - Standard Test Method for Compositional Analysis b yThermogravimetry.(Application for copies should be addressed to the American Society for Testing andMaterials, 100 Barr Harbor Drive, West Conshoho
21、cken, PA 19428-2959.)2.3 Order of precedence . In the event of a conflict between the text of this documentand the references cited herein, the text of this document takes precedence. Nothing in thisdocument, however, supersedes applicable laws and regulations unless a specific exemption hasbeen obt
22、ained.3. REQUIREMENTS3.1 Qualification . Track shoe assemblies, track shoe pads, and track shoe bushingsfurnished under this specification shall be products which have been tested and have passed thequalification tests specified herein. The qualification process is divided into three phases asdefine
23、d in section 3 of this specification: Phase I, Plant/Facilities Inspections; Phase II,Establishment of Contractors Control Plan and Compound Characteristics; and Phase III,Endurance Tests. The procedures and requirements of these phases must be successfullycompleted and all requirements met prior to
24、 a contractor becoming qualified for listing on theQPL. Section 4 of this specification establishes the quality control requirements based onsection 3 as applicable to all track procurement contracts.3.1.1 Control plan . The contractor shall provide a control plan (see 4.5.1) addressing therequireme
25、nts of this specification that identifies how the contractor intends to conform to thisspecification. This plan will require Government approval and will be included as part of thequalification process. This plan shall be submitted to the Quality Assurance Representative(QAR) and Preparing Activity
26、for review and approval. This control plan should be general innature, identifying the contractors capability in conforming to the requirements of thisspecification and should not contain proprietary information. This plan should identifysubcontractor control requirements in compliance to this speci
27、fication as related to rubber.3.1.2 Materials . The materials used in the production of shoes, pads, bushings andassemblies shall meet the requirements of this specification and be in accordance with theapplicable drawings of the track TDPs.3.1.3 Recycled, recovered, or environmentally preferable ma
28、terials . Recycled, recovered,or environmentally preferable materials should be used to the maximum extent possible providedthat the material meets or exceeds the operational and maintenance requirements, and promoteseconomically advantageous life cycle costs.Provided by IHSNot for ResaleNo reproduc
29、tion or networking permitted without license from IHS-,-,-MIL-DTL-11891G(AT)53.1.4 Qualified products list . Type I and type II track shoe assemblies, track shoe sets,track shoe pads, and type III bushings furnished under this specification shall be products whichare qualified for listing on the app
30、licable qualified products list at the time set for opening of bids.Qualification for all systems/components includes the contractors plan, all materials, processes,tests, facilities, and assembly, as applicable, of these systems or components. The contractor isresponsible for the entire component/a
31、ssembly being submitted for qualification and subsequentproduction including all metal parts and fasteners.3.1.5 Approval for the rebuild/overhaul of track components . Contractors/military depotswhich desire to obtain approval for the rebuild of track or track components covered by thisspecificatio
32、n must utilize this specification in conjunction with the current Depot MaintenanceWork Requirement (DMWR) for single pin and double pin track used on military vehicles. Thisspecification should be used to specify requirements for rubber and rubber processing. TheDMWR should address the quality of t
33、he rebuilt/overhaul metal components.3.2 Phase I, plant/facilities inspection . Defense Standardization and SpecificationProgram SD-6, “Provisions Governing Qualification (Qualified Products Lists)” andDOD 4120.3-M, “Defense Standardization Program Policies and Procedures”, authorizes thepreparing a
34、ctivity or its authorized agent to conduct plant/facility inspections prior to the start ofany qualification testing. Subcontractors that provide uncured rubber for processing by thecontractor requesting qualification shall be subjected to the same inspection and test requirementson that portion of
35、the product/process that is within the subcontractors purview.3.3 Phase II, establishment of contractors control plan and compound characteristics . Prior to the start of qualification hardware fabrication, the contractor shall establish a ProcessFingerprint Plan (see tables I and II, and 4.5.2.4) t
36、hat describes the entire process used to producethe qualification hardware. This plan shall identify the target values and ranges (limits/tolerances)the contractor expects during qualification hardware fabrication. This plan shall address all therequirements of this specification and adequately desc
37、ribe the process and product supplied forqualification. This plan shall bear the signatures of the Government QAR and an authorizedrepresentative of the contractor. This plan shall remain at the contractors facility but be madeavailable for review by the preparing activity or its authorized agent. T
38、his information shall not bedisclosed in whole or in part for any purpose other than to evaluate the product submitted forqualification testing.3.3.1 Qualification hardware fabrication . The fabrication of the qualification hardwareshall be in accordance with the approved Process Fingerprint Plan (s
39、ee 3.3). All testing must beconducted in the presence of a government inspector or its authorized agent, signed off forconformance to the requirements and dated. This plan and test data generated during thefabrication of elastomeric components for qualification will be used by the Government as amea
40、sure of conformance/performance in future production contracts (see 3.4.1.2) and will remainproprietary to the contractor. All records/test results of all lots of elastomeric materials used inProvided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-DTL-11
41、891G(AT)6the preparation of all qualification hardware shall be made available to the Government QARupon request . This information shall not be disclosed in whole or in part for any purpose otherthan to evaluate the product submitted for qualification testing. The Government reserves theright to co
42、nduct these tests at any time to ensure compounds in production are in conformance tothe data established during qualification.3.3.2 Test records and compound identification . All test records must contain at aminimum, the compound identification and source, test results, test facility identificatio
43、n, dates oftests, and name of tester. These records must be signed and dated by the Government QAR orauthorized agent. The contractor will identify the method to be used during qualification andutilize the same method during subsequent production testing. Compound numbers must beidentified to the co
44、mponent being qualified (i.e. bushing compound xxxxx, ground pad compoundyyyyy and roadwheel path compound zzzzz) and fully identified on the applicable testrecords/data sheets. Any record, data sheet or certification lacking proper identification, or onethat does not contain clear and concise infor
45、mation will not be considered in compliance to theserequirements and rejected.3.3.3 Track bushing characteristic tests . Table I has been established in order to identifythe compound performance characteristics/properties being provided for qualification for futurereference and production control pu
46、rposes, pending successful qualification. Table I identifies therequirements for establishing the characteristics of the bushing compound(s). These tests will beperformed during the fabrication of the T130E1 long bushings (P/N 11678029) required forqualification and in accordance with the requiremen
47、ts established in Appendix A.3.3.3.1 Specimen preparation . Specimens shall be prepared in accordance with theapplicable ASTM and shall be of an equivalent state of cure to that of the bushings submitted forendurance testing. The following tests will be performed on samples taken at the final mixing
48、 ofthe compound (see 4.3.1.1) and be of an equivalent state of cure as bushings submitted forqualification: specific gravity, hardness, tensile strength, elongation, tensile stress, agedproperties, brittleness point, cure meter, thermogravimetric analysis (TGA), load deflection,compression set and G
49、/C mass spec. The following tests shall be performed on vulcanizedsamples: hardness, adhesion, and bushing endurance (see 4.3.1.2).3.3.3.2 Specific gravity . Specific gravity tests will be performed on the bushingcompounds subject to qualification test in accordance with ASTM D792. Specific gravity testswill be performed on 3 samples from each compound submitted for qualification and all resultswill be provided to the Government. Samples shall be taken from unvulcanized compounds a
