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B. Fluid Back-Filling 



6. The center differential lines are filled first. The 

 transducer stack is laid on its side with the bottom slightly 

 elevated. Two center bleed ports face up. The line to be filled 

 is flexed up so that the housing is above the stack. Fluid is 

 poured in to the housing until a steady flow streams from the 

 bleed port. The port is then closed. (Figure D-1.) 



7. Enough fluid must be poured into the housing so that it forms 

 an inverted meniscus about the o-ring. The elastomer diaphragm is 

 slid horizontally over the fluid until its holes line up with the 

 threaded holes in the housing. The copper-nickel ring is then 

 lowered carefully onto the elastomer and secured to the housing 

 with Monel screws. Each housing, elastomer, and ring is labelled 

 as a set. The labels should fall in line so that the holes in 

 each of the three match. 



8. The process is repeated for each of the center differential 

 lines. 



9. The arm sensors are filled next. 



10. A large plate is attached to the bottom of the stack using 

 the threaded ( 6-32) holes in the stand-offs, 



11. The stack is inverted (end-cap down) on top of a stand or 



