Datex-Ohmeda Aespire 7900 User's Reference Manual page 32

Aespire 7900
2-10
8. On the manifold assembly, remove the check valves circuit lens (1) by
squeezing the latches (2) together and pulling up on the lens.
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9. Press at (2) to unlock the ramp (1). Rotate the ramp and remove the tabs
from the slots (3) to remove the ramp.
10. Lift the diaphragm to remove it.
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