TM  10-8110-201-14&P assembly  (4),  and  turn  valve  stem  clockwise  to  in- stall  it  through  the  bellows  assembly. (3) Install seal (5) and preformed packings (2 and 3). (4) Screw the nut (8) on the valve stem until ap- proximately one half of the valve stem threads are through  the  nut. (5) Place bellows assembly against housing body (16), and align the holes. (6) Install three screws (10) in the bellows assembly  and  housing  body.  Tighten  screws securely. (7) Place the two housing bodies (11 and 16) together,  and  align  the  holes. (8) Place four screws (12 and 18) through the housing  bodies,  and  install  nuts  (15)  on  the  screws. (9) Install  capscrew  (1)  in  the  housing  bodies. (10) Tighten nuts and capscrew to 20 foot- pounds  (2.77  m-kg)  torque. (11) Test and adjust the pilot valve a and b above. 4-23. Venturi. a. Removal and Disassembly. (1) Remove  capscrew  (1,  fig.  4-13)  from  housing bodies (11 and 16). (2) Remove nuts (15) from screws (12 and  18) and  remove  the  screws  from  the  housing  bodies. (3) Separate  the  housing  bodies  and  pull  ven- turi  (14)  from  housing  body. (4) Remove  preformed  packings  (13)  from  the venturi. b. Inspection and Repair. (1) Inspect the venturi to determine if it is cracked,  burred  or  worn. (2) Replace  a  damaged  venturi  with  ser- viceable  one. (3) Replace the three preformed packings with serviceable  ones. c. Reassembly and Installation. (1) Install  three  serviceable  packings  (13,  fig. 4-13) on the serviceable venturi (14) and install the venturi in the housing body. (2)  Place  the  housing  bodies  (11  and  16) together, align the holes and install the screws (12 and 18) and nuts (15). Tighten nuts to 20 foot- pounds  (2.77  m-kg)  torque. (3) Install  capscrew  (1). 4-24. Female Coupling Half. a.  Cleaning  and  Inspection. (1) Wash  female  coupling  half  (17,  fig,  4-11) with a hot water and soap solution and dry it with a  clean  cloth. (2) Inspect  the  female  coupling  to  determine  if cracked,  burred  or  leaking. (3) Inspect  coupling  for  damaged  or  missing dust plug (18), gasket (19), chain, or key rings. b. Repair. (1) Replace Gasket. Using a pointed instru- ment, remove a damaged gasket from the female coupling  half.  Install  a  serviceable  gasket  in  the female coupling half. (2) Replace Dust Plug. Remove a damaged dust plug from the key ring. Pry open the key ring, and  install  a  serviceable  dust  plug  on  the  key  ring. (3) Replace  Chains  and  Key  Rings.  Follow  the procedures  in  c below. c.  Replacement. (1) Remove the dust plug (18, fig. 4-11) with chain and key rings from the damaged female coupling  half  (17). (2) Remove  the  damaged  female  coupling  half from  the  pressure  control. (3) Apply a coating of anti-seize compound (item 2, App. D) to the threads of a serviceable female coupling half, and install it in the pressure control. (4) Pry open a serviceable key ring, install it on the female coupling half, and install a ser- viceable  chain  on  the  key  ring. (5) Pry  open  another  serviceable  key  ring,  and install it on the dust plug end of the chain. Install a serviceable  dust  plug  on  the  key  ring. 4-25. Male Coupling Half. a.  Cleaning  and  Inspection. (1) Wash the male coupling half (15, fig. 4-11) with a hot soap and water solution. Dry it with a clean  cloth. (2) Inspect the male coupling half to determine if  it  is  cracked,  burred,  or  leaking. (3) Inspect the male coupling half for damaged or missing dust cap (16), gasket (19), chain or key rings. 4-23