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TM 10-4930-247-13&P
4-18.
VALVED DRY BREAK COUPLING REPAIR -cont.
(6)
Remove ball (10) from back of body (21).
(7)
Remove stem (11) and attached preformed packing (12) from body (21).
(8)
Remove spring washer (13), stop pin (14) and preformed packing (15) from body (21).
(9)
Remove self-locking setscrew (16), lock out pin (17) and spring (18) from body (21).
(10)
Remove seal (19) and preformed packing (20) from body (21).
c.
Cleaning.
WARNING
Dry cleaning solvent, P-D-680, Type III, is potentially dangerous to personnel and
property. Eye and skin protection is required. Avoid repeated and prolonged skin
contact. Wash hands immediately after exposure. Do not use near open flame or
excessive heat. Use only in areas with good ventilation.
Using wiping rags and cleaning solvent, remove dirt and contaminants from all components.
d.
Inspection. Refer to figure 4-10.
(1)
Inspect body (21) for cracks, scratched or damaged sealing surfaces, damaged locking lugs and corrosion.
(2)
Inspect dust cap (2) for cracks and damaged or missing locking lugs.
(3)
Inspect stop pin (14) for cracks, wear and scoring.
(4)
Inspect ball (10) for corrosion, flat spots and wear.
(5)
Inspect lock out pin (17) for wear.
e.
Repair. Replace damaged and mandatory replacement components.
f.
Assembly. Refer to figure 4-11.
NOTE
Ensure that all parts identified as mandatory replacement parts are discarded and
replaced with new components.
(1)
Lightly coat preformed packings (12, 15 and 20) and seals (1 and 4) with silicone compound.
(2)
Install preformed packing (20) and seal (19) in body (21). Make sure seal is fully seated in body. Seal will snap
in place on top of preformed packing when correctly installed.
(3)
Install setscrew (16), lock out pin (17) and spring (18) on body (21). Tighten screw until bottomed out, then
back off 1-1/2 turns.
4-32
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