ARMY ZZ-T-441 H-1989 TIRE PNEUMATIC RETREADED AND REPAIRED《经维修及翻新的充气轮胎》.pdf

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1、9999974 0353262 259 E 22-T-441H June 13, 1989 SUPERSEDING . FEDERAL SPECIFICATION 22-T-441G January 13, 1986 TIRE, PNEUMATIC: RETREADED AND REPAIRED This Federal specification is approved by the Commissioner, Federal Supply Service, General Services Administration, for the use of all Federal Agencie

2、s. 1. SCOPE AND CLASSIFICATION 1.1. Scope. This specification prescribes methods, procedures and acceptable commercial practice processing applicable to retreading or repairing of pneumatic tires for use by O.S. Government activities with the goal of providing reliable performance capabilities as sp

3、ecified in Federal Specifications 22-T-381, ZZ-T-410, 22-T1083, and ZZ-T-1619, conservation of resources; and in addition, specifically requir mandatory preaward facility certificatiun. 1.2 Classification. 1.2.1 Groups. Tires are grouped as follows: with economy and I es 1. Passenger car 2. Light tr

4、uck, light utility trailers and other miscellaneous light vehicles. Truck, bus and medium to large trailers 3. 4. Special service (including Military, agricultural, off- the-hiqhway, and industrial tires marked not for highway Services (NHc) DISTRIBUTION STATEMENT A: Approved for public release; dis

5、tribution is unlimited. - FSC 2640 s Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-9999974 01532b3 L95 = 22-T-44 1H 1.2.2 Types. Retreaded and repaired tires shall be of the following types as specified (see 6.1): I, Retread: uncured tread method T

6、ype I-A Fll Type I-B Top Type I-C Relugged Type I-D Bead-to-bead If. Retread: precured tread method Type II-A Pull Type II-B TOP iII. Repair Type III-A Nail hole Type III-B Spot Type III-C Reinforcement Type III-D Section 4 1.2.3 Classes. Class r/t - Regular tread Class a/c - All season tread Class

7、s/t - Snow tread Class a/t - All terrain tread Class o/o - On/off highway tread Class d/a - Drive axle tread 2. APPLICABLE DOCUMENTS , 2.1. Government Documents. The following documents, issues in effect on date of invitation for bids or requests for proposal, form a part of this specification to th

8、e extent specified herein. 2 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-W 9999974 0153264 O21 ZZ-T-44 1H Federal Specifications: ZZ-P-112 - Patch, Repair (Self-Vulcanizing, Hot, for Inner Tubes and Tubeless Tires) 22-T-416 - Tire, Pneumatic: Ret

9、read and Repair Material. Fed. Test Method Std. No. 601 - Rubber: Sampling and Testing 22-T-381 - Tire, Pneumatic, Vehicular (Highway) ZZ-T-410 - Tire, Pneumatic, Industrial 22-T-1083 - Tire, Pneumatic, Low Speed, Off Highway 22-T-1619 - Tire, Pneumatic, Agriculural (Activities outside the Federal G

10、overnment may obtain copies of Federal specifications, standards, and commercial item desbriptions as outlined under General Information in the Index of Feberal Specifications, Standards, and Commercial Item Descriptions. The Index, which includes cumulative bimonthly supplements as issued, is for s

11、ale on a subscription basis by the Superintendent of Documents, O.S. Government Printing Office, Washington D.C. 20402). (Single copies of this specification, and other Federal specifications and commercial item descriptions required by activities outside the Federal Government for bidding purposes

12、are available without charge from the General Services Administration Business Service Centers in Boston, MA;*New York, NY; Philadelphia, PA; Atlanta, GA; Chicago, IL; Kansas City, MO; Fort Worth, TX; Denver, CO; San Francisco, CA; Los Angeles, CA; Auburn, WA; and Washington D.C.) (Federal Governmen

13、t activities may obtain copies of Federal standardization documents and the Index of Federal Specifications, Standards, and Commercial Item Descriptions from established distribution points in their agencies.) 3 Provided by IHSNot for ResaleNo reproduction or networking permitted without license fro

14、m IHS-,-,- 4 0153265 Tb8 22-T-441H Military Specification: MIL-T-4 Tire, Pneumatic, and Inner Tube, Pneumatic Tire: Tire with Flap; Packaging and Packing of. Military Standards: MIL-STD-105 Sampling Procedures and Table for Inspection MIL-STD-51312 Patch, Pneumatic Tire Repair, Uncured. (Copies of m

15、ilitary specifications and standards required by by Attributes. contractors in connection with specific acquisition functions should be obtained from the procuring activity or as directed by the contracting officer.) Department of Transportation: 49 CFR Tire Identification and Record Keeping 49 CFR

16、571.117 Retreaded Pneumatic Tires. (The Code of Federal Regulations (CFR) and the Federal Register (FR) are for sale on a subscription basis by the Superintendent of Documents, U.S. Government Printing Office, Washington D.C. 20402. When indicated, reprints of certain regulations may be obtained fro

17、m the Federal agency responsible for issuance thereof.) 2.2 Non-Government Publications: The following documents from a part of this specification to the extent specified herein. a specific issue is identified, the issue in effect on date of invitation for bids or request for proposal shall apply. U

18、nless The Tire and.Rim Association, Inc. Year Book: (Copies may be obtained from the Tire and Rim Association, Inc., 3200 West Market Street, Akron, Ohio 44313.) Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-= 7799974 0353266 9T4 = 2 2-T-4 4 1H The

19、 Rubber Manufacturers Association: RMA Shop Bulletin No. 29 - Standard Buffing Textures- Retreading and Repairing (Copies of the RMA bulletin can be obtained from the Rubber Manufacturers Association, 1400 K Street, N.W.I Washington e 20005.) D.C. The American Society For Testing and Materials (ASTM

20、) ASTM D2240 - Rubber Property-Durometer Hardness, Test Method For. (Copies may be obtained from The American Society For Testing and Materials, 1916 Race Street, Philadelphia, PA 19103. 2.3 Order of precedence. text of this specification and the references specified herein, the text of this specifi

21、cation shall take precedence. specification, however, shall supersede applicable laws and regulations unless a specific exemption has been Obtained. In the event of a conflict between the Nothing in this 3. REQUIREMENTS 3.1. Production Facility Requirements. 3.1.1 Facility Certification. The tires s

22、erviced under this specification shall be processed only in facilities accepted by the Government. Acceptance shall be through a production inspection conducted in accordance with Section 10 Appendix and a certified rating of Approved. may provide evidence of certification of the production facility

23、 from a Government approved nationally recognized tire retreading association or a Government approved tire retreading quality assurance system, within the previous 12 month period. As an alternative, the prospective contractor Provided by IHSNot for ResaleNo reproduction or networking permitted wit

24、hout license from IHS-,-,-2 2-T- 4 4 1 H 3.1.2 Processing Standards. Written standards conforming to the American Retreaders Association (ARA), National Tire Dealers and Retreaders Association (NTDRA), or the Rubber Manufacturers Association (MA) industry recognized procedures shall be followed in t

25、he performance of each operation. Copies of the written procedure(s) shall be available at the appropriate location and shall be furnished to the Government representative for reference during the preaward survey. Such procedures shall establish responsibilities for personnel performing the operatio

26、n, to include : (a) Conditioning of casings (drying, etc.) . (b) Inspection procedures; sequence and scope of (c) Buffing. (a) Cementing. (e) Tread rubber application. (f) Curing. (9) Trimming and finishing. (h) Final inspection. inspections. 3.2 Materials. All materials used in the process of retre

27、ading and repairing tires shall conform to ZZ-T-416 (see 4.2). 3.3. Casing Inspection and Selection for Retreading. (All casings to be retreaded shall be supplied by the Government. Rejected casings shall remain the property of the agency that supplied the tire for retreading. The agency shall arran

28、ge for the proper disposal of any rejected casings). Casings inspection shall be made by a skilled operator and shall include: demounting the tire from the rim (when required), and placing the tire on a mechanical spreader under 300 ft. candle recomended,i 200 ft candles minimum lighting, and distor

29、ting the natural contour of the tire sufficiently for visual and manual examination. To avoid possible damage, the casing shall not be distorted more than 30 percent of the section height. Casings accepted for retreading shall not contain any of the following defects: a. Ply separation. b. aroken, d

30、amaged, kinked or exposed bead wire. c. Injuries to the body plies in the bead area. d. Flex breaks. 6 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,- 9999974 OL532bB 777 22-T-4 4 1H e. f. 9. h. i. j. k. 1. m. n. 0. P* 9. I. S. t. Loose cords on the

31、 inside ply or evidence of having been run underinflated or overloaded. Tread separations which cannot be removed during buffing. Sidewall separation. Weather checking extending to the body plies or deeper than 2/32 inch Non-repairable damage to the inner liner or bead seating area on tubeless type

32、tires. Wear into the belt, breaker or body plies on passenger car tires. Nail holes or injuries exceeding the sizes as specified in Appendix B that cannot be repaired using acceptable commercial practices. Cut, exposed or broken cords of the belt, breaker or body plies on passenger car tires. Labeli

33、ng of passenger car sizes not in accordance with the requirements of 49 CPR 571.117 - Retread Pneumatic Tire. Belt separation on radial type tires. Bias type truck tires worn to tbe body plies which would require more than 10 percent of the circumference of the top ply to be removed during buffing.

34、Radial truck tires worn into the top belt material more than 10 percent of the worn tire circumference. tires that have been constructed with a protector belt, it may be removed without replacement if the practice is acceptable to the original tire manufacturer. NOTE: If the protector belt is remove

35、d without replacement, the tires must be so identified. Circumferential cracking. Bead distortion in radial type tires. Porous liners in tubeless type tires. Rusted steel belts in radial ply tires. On 7 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,

36、-4 0353267 603 ZZ-T-4 4 1H 3.4 Processing. 3.4.1 Buffing. The buffed casing shall be to the original dimensions of the casing manufacturer minus the tread pattern and depth. profile in accordance with the procedure specifications. The buffed surface on the casing shall be free of contamination or ox

37、idation. The buffing radii used must be in accordance with specifications approved by both the retread supplier and the original tire manufacturer. For tires needing repairs at this point, see Appendix B. After buffing, the casing shall be inspected using the items listed under 3.3. 3.4.1.1 Uncured

38、tread retreadinq. (Type I). The casing utilizing uncured tread rubber shall be uniformly buffed using a matrix template or other system of measure to insure matching of the matrix tread contour and size. The casing with the uncured tread rubber applied shall be shaped and properly fitted into the ma

39、trix in accordance with bead to bead, diameter and section width as published in the specifications for the equipment used. 3.4.1.2 Precured tread retreading. (Type II). Tires must be built in an inflated condition. The casing utilizing precured tread rubber shall be buffed to the width that is appr

40、opriate to the fixed dimensions of the precured tread rubber specified. The radius of the buffed area shall have all tread grooves removed and shall be centered on the casing with equal shoulder heights. The finished tire shall be as close as possible to the specified radius. The precured tread rubb

41、er width shall be within +/- l/8“ of the casings original tread width. 3.4.2 Cementing. Buffed casings to be cemented shall be clean and free of foreign materials such as buffing dust, dirt, oil, or any foreign matter. Cementing shall be accomplished within a maximum of 8 hours after buffing. Buffed

42、 casings stored over 8 hours shall be rebuffed/reworked prior to cementing. In procedures that do not require cementing of the casing, the tread shall be applied within 8 hours or the casing reworked to comply with the 8 hour requirement. otherwise the casing shall be reworked, cleaned and/or receme

43、nted. The worn tread surface shall be removed to a symmetrical . Tires shall be built within 12 hours of cementing; T 8 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,- m 9999974 0353270 325 m 22-T-441H 3.4.3 Tread Rubber Application (Building) . 3.4

44、.3.1 Uncured tread retreading. (Type I). The tread shall be of a crown, base and gauge dimension as required for the matrix design and size in which the tire is to be cured and shall provide a minimum undertread gauge as specified in paragraph 3.6.4. Tread rubber adhesive surfaces shall not be conta

45、minated. Tread rubber must be centered around the buffed circumference of the tire, Stitching shall be performed in such a way as to eliminate trapped air pockets, pulling the tread area off centerr distortion of the rubber shoulders, folds, and wrinkles in the rubber shoulders. Splices shall be mad

46、e in such a manner to insure minimum distortion of the rubber. 3.4.3.2 Precured tread retreading. Tires must be built in an inflated condition. The tread rubber shall be centered around the buffed circumference of the tire. The tread pattern interruption shall be minimized at the tread splice. The c

47、ut ends of the tread shall be texturized and cemented over the entire surface, and cushion gum shall be applied to at least one cut edge. shall be free of contamination. All ends 3.4.3.3 Tread patterns. The tread patterns shall be of the following classes for Groups 1, Zr and 3. The contractor shall

48、 furnish the ordering activity their commercially available tread pattern which meets the performance criteria of the class specified. (See 6.1). Tread patterns for Group 4 shall be classified as Highway Service, Traction Tread, or Trailering Servi ce . Class r/t (regular tread) - This tread pattern

49、 is a general purpose, all-wheel position, rib pattern, for use on highways. The pattern must be ideally suited for year-round use in southern U.S. and for spring, Sumer, and fall in North U.S. this tread pattern shall also provide adequate traction in mild winter conditions. Class a/s (all season) - This tread pattern is to be a general purpose, all-position tread that combines most of the benefits of the