A-A-52517 Patch, Repair, For Inner Tubes And Tubeless Tire Liners (Metric)This CID covers hot self-vulcanizing chemical units; chemical vulcanizing patch unit kits, and fluids for repairing robber inner tubes of pneumatic tires and tubeless pneumatic tire liners. The patch units are used in repairing injuries caused by penetrating objects up to and including 3.2 millimeters (mm) in diameter in tubeless tires and injuries up to 19.1 mm in length (tears) in inner tubes.

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A-A-52517

Type II - Chemical cure patch kits.

Sizes: 1- Small round.

2- Medium round.

3- Large round.

4- Large oval.

5- Assorted sizes 1 through 4.

2.1 Materials. All materials shall be of a quality necessary to produce patch units which shall meet the requirements specified herein. The use of recovered material made in compliance with regulatory requirements is acceptable providing that all requirements of this CID are met (see

5.5).

2.2 Designs and construction.

2.2.1 Hot cure patch units, type I. Each patch unit shall be made up of a complete integral item consisting of the components specified in 2.2.1.1 through 2.2.1.5, and shall conform to the sizes specified in table I.

TABLE I. Dimensions of patch proper and of fuel pan (type I).

2.2.1.1 Hot patch gum. The hot patch gum, as furnished for vulcanizing, shall be an uncured, soft and plastic robber compound containing not less than 65 percent (%) natural or synthetic polyisoprene rubber having a covering on one side of white Holland cloth not less than 0.13 mm in thickness or plastic material not less than 0.089 mm in thickness, with the other side pressed against the bottom of a fuel pan (platen). Either covering shall be easily removable prior to application of the patch unit for repair.