TM 10-4320-303-13
2.3.2.1 Removal
Figure 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 of
gasket (2).
CAUTION
Overhanging of gasket on grooved fittings may result in damage to gasket when
tightening 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 not
overhang end of grooved fitting (3).
c. Align end of second grooved fitting (6) with first grooved fitting (3). Slide gasket (2) to center position
between 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 grooved
fittings (3 and 6).
e. Install two bolts (4). Place nuts (1) on bolts (4) and hand-tighten.
CAUTION
Over tightening nuts may cause gasket to pinch. Tighten nuts only until coupling
halves are firmly together (metal-to-metal).
f. Tighten nuts (1) alternately and equally until coupling halves (4) are firmly together.
2-37
