TM 10-4320-303-132.3.2.1 RemovalFigure 2-12. Grooved Pipe Coupling.a. Disassemble grooved pipe coupling by removing two nuts (Figure 2-12, 1), bolts (4), coupling halves(5), and gasket (2).b. Check gasket (2) for damage. If gasket (2) is damaged, replace it.2.3.2.2 Installation.a. Apply thin coat of non-petroleum silicone lubricant (item 5, appendix E) to gasket lips and outside ofgasket (2).CAUTIONOverhanging of gasket on grooved fittings may result in damage to gasket whentightening nuts. Ensure gasket does not overhang grooved fittings.b. Place gasket (2) over grooved fitting (3) on first component, being sure that gasket (2) does notoverhang end of grooved fitting (3).c. Align end of second grooved fitting (6) with first grooved fitting (3). Slide gasket (2) to center positionbetween grooves. No portion of gasket (2) should overhang grooves of grooved fittings (3 and 6).d. Place coupling halves (5) over gasket (2). Ensure that coupling half keys are in grooves of groovedfittings (3 and 6).e. Install two bolts (4). Place nuts (1) on bolts (4) and hand-tighten.CAUTIONOver tightening nuts may cause gasket to pinch. Tighten nuts only until couplinghalves are firmly together (metal-to-metal).f. Tighten nuts (1) alternately and equally until coupling halves (4) are firmly together.2-37
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