9-65 
6.  Remove the cramp ring to take out the valve needle. 
   
 
 
9.4.9 Remove Patient Circle Assembly 
1.  Remove the CO2 Bypass assembly as per section 9.4.6. 
2.  Pull the patient circle assembly away from the rotating block assembly. 
 
 
9.4.10 Remove Bellows Assembly 
1.  Turn the bellows dome counterclockwise and lift off to remove. 
   
Snap ring 
Valve Seal