|
| |
TM 10-4930-247-13&P
4-18.
VALVED DRY BREAK COUPLING REPAIR -cont.
g.
Installation. Refer to figure 4-12.
(1)
Lightly coat preformed packings (3, 5 and 7) with silicone compound.
(2)
Install eight springs (8),preformed packing (7) and ball seal (6) in fitting (9).
(3)
Install preformed packing (5) on fitting (9).
(4)
Push coupling (10) onto fitting (9).
(5)
Position coupling (10) so that opening for balls (4) is pointing up.
(6)
While pressing coupling (10) onto fitting (9), install 41 balls (4). Rotate coupling back and forth on fitting to aid
installation.
(7)
Install preformed packing (3) on screw (2).
(8)
Install screw on coupling (10).
h.
Adjustment. Refer to figure 4-13.
CAUTION
Misadjustment of the valved coupling may prevent movement of control handle and
prevent disconnection of coupling from mating component.
NOTE
Turning setscrew too far in will cause control handle to stick or jam in one position.
Turning setscrew too far out will prevent disconnection of coupling.
(1)
Check control handle operation. Set control handle (1) on coupling (2) from OPEN position to CLOSE. If
handle cannot be moved from one position to the other, or handle sticks between either position, adjust coupling
as follows:
(a)
Turn setscrew (3) to the left (counterclockwise) 1/4 turn.
(b)
Move control handle (1) from OPEN to CLOSE position.
(c)
Repeat steps (a) and (b) as required until control handle (1) moves freely without sticking.
(2)
Check lock out pin operation. Remove dust cap (4) from coupling (2). If dust cap can be removed, coupling is
adjusted correctly. If dust cap cannot be removed, adjust setscrew as follows:
(a)
Turn setscrew (3) to the right (clockwise) 1/4 turn.
(b)
Attempt to remove dust cap (4) from coupling.
(c)
Repeat steps (a) and (b) as required until dust cap can be removed easily.
4-36
|
