Figure L-29. Flashing sphere in sphere stand. 



Then place the flashing sphere on the spacer, 

 and draw the purse string of the net bag tight 

 and tie with several knots. Finally, stretch the 

 net as tight as possible by wrapping and tying 

 the piece of i/g-inch diameter nylon line around 

 the net between the spheres. Care should be 

 taken to avoid contact between the spacer and 

 a hose clamp. Mouse all knots with tape or 

 thread. 



Step 5. Remove the plastic caps from the 

 steel core barrel of the ballast component (see 

 fig. L-26) and slide the plastic liner out of the 

 core barrel. Save the plastic caps. 



Step 6. With a solvent (trichloroethylene), 

 clean the outside of both ends of the liner and 

 also the lip of the core catcher. 



Step 7. Install the core catcher in one end of 

 the plastic liner and tape the liner and core 

 catcher together. Use no more than five turns 

 of %-inch black vinyl tape, (equal to Scotch 

 No. 88) and keep the tape above the groove on 

 catcher lip (fig. L-30) so that the liner will slide 

 freely inside the steel core barrel. 



Step S. Set the valve in the valve/release 

 mechanism tube as shown in figure L-Sl by 



Change 1—1970 



-5 TURNS (LAYERS) 

 OF TAPE 



CORE CATCHER LIP 



Figure L-30. Core catcher installed in liner. 



turning the valve to vertical and pushing the 

 valve/release pin through the pin tube on the 

 liner release lever rod and into the pin hole in 

 the valve. Do not push the i^in all the way down 

 as this might cause the valve/ release mechanism 

 to malfunction. Test the setting several times by 

 pulling the tether line as shown in figure L-31 

 and tripping the mechanism. Then set the pin 

 so that a very light pull on the tether line will 

 pull the pin and let the valve close and free the 

 liner release lever rod. 



RUBBER BANDS 



VALVE /RELEASE 

 PIN 



LINER RELEASE 

 LEVER ROD 



IN TUBE 



LINER RELEASE 

 LEVER 



PIN HOLE IN VALVE 

 VALVE 



Figure LSI, Boomerang corer valve/release mecha- 

 nism tube (cutaway view). 



Step 9. Tape the valve/release mechanism 

 tube to the other end of the core liner. Use five 

 strips of vinyl fiber tape and not more than four 

 layers of 34-inch black vinyl tape as shown in 

 figure L-32 so that taped liner will slide freely 

 inside core barrel. 



Step 10. With the ballast component in its 

 cradle (fig. L-33), remove the hose clamp that 

 holds the pilot weight against the ballast weight 

 and slide the pilot weight down below the spiral 

 row of holes in the core barrel. 



Step 11. Slide the core catcher end of the 

 liner down through the float retaining shell and 



L-25 



