Datex-Ohmeda 7900 Service Manual page 94

5/Maintenance
3. Inspect the flapper and valve seat for nicks, debris and cleanliness.
4. Pull the tail of the new free breathing valve flapper through the cen-
ter of the valve seat until it locks in place.
5. Trim the tail in line with the bottom edge of the valve seat, see
figure 5-3.
Figure 5-3
Free Breathing Valve flapper replacement
6. Replace the O-ring. Lubricate with a thin film of KRYTOX
7. Back the seat threads counter clockwise until you feel the thread
engage. Hand screw the assembly into the manifold.
8. Replace the deflection tube on the valve. The tube has a rolled edge.
Ensure that the edge slips over the ridge of the valve seat.
5-4 1503-0151-000 5/26/0
™.