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Page Title: Emergency Repairs with Mechanical Patches
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TM 10-5430-242-12&P 0006 00 0006 00-3 Emergency Repairs with Mechanical Patches Small slits, tears, or cuts [not to exceed 6-inches (15.24 centimeters) in length] may be repaired with mechanical patches. The size of the damaged area (opening) needing repair will govern the size of the mechanical patch needed.  Select clamp size as follows:   1.    For holes (tears) less than 1-inch (2.54 centimeters) in length, use the 2.25-inch (5.7 centimeters) mechanical patch. 2.    For holes (tears) 2 to 3 inches (5.08 to 7.62 centimeters) in length, use the 4-inch (10.16 centimeters) mechanical patch. 3.    For holes (tears) 4 to 5-inches (10.16 to 12.7 centimeters) in length, use the 6-inch (15.24 centimeters) mechanical patch. WARNING It may be necessary to increase the size of the tear in order to insert the bottom plate of the clamp. Be careful when installing a mechanical patch in the tank.  Fuel will pour out when a larger slit is made in the tank. Leaking fuel can cause personal injury, fire, explosion, or loss of Government property. 4.    Loop cord around wrist (1) to prevent loss of the mechanical patch into tank. 5.    Insert the bottom plate (2) of the mechanical patch through the hole or tear and rotate it until it is centered, and its length runs with the tear. 6.    Pull the bottom plate up against the fabric, and slide the top plate (3) and wing nut (4) down the cord and onto the threaded stud (5) of the bottom plate. CAUTION Do not over tighten the wing nut, as stud threads may be stripped, or damage to the tank fabric may occur. 7.    With the plates aligned, tighten the wing nut (4), clamping the tank wall between the two plates.   Tighten the wing nut enough to stop the leak. Installation of Mechanical Patches 1 2 3 4 5

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