130 ENGINEER'S BRAKE VALVES 



PC. No. Ref. No. Name of Part 



17,445 6 Return spring. 



15.303 7 Cover. 



11,943 8 



17,255 9 



17,248 10 



13,109 11 



6,760 12 



19,071 13 



9,926 14 



11,966 15 



Screw for return-spring casing. 



Rotary valve. 



Rotary-valve kej'. 



Rotary- valve spring. 



Key washer. 



Upper clutch. 



Handle nut. 



Brass handle, complete, includes 16, 17, 



and 18. 

 18,748 15 Malleable-iron handle complete, includes 



16, 17, and 18. 

 9,810 16 Latch spring. 

 1,368 17 Latch screw. 

 11,932 18 Latch. 



12.304 19 Cover screw. 

 6,653 20 Oil plug. 



15,332 21 Bolt and nut. 



12.305 22 Holding stud. 

 10,844 23 Holding nut. 

 15,307 24 Upper gasket. 

 28,467 25 Lower gasket. 

 19,070 26 Lower clutch. 

 17,138 27 Return-spring stop. 

 12,304 28 Fillister-head screw. _ 



18,365 Distributing-valve union connection, com- 



plete, includes 202, 203, and 204. 

 18,364 202 Union stud. 

 15,292 203 Union nut. 

 18,363 204 Union swivel. 



OPERATION OF S-6 INDEPENDENT BRAKE VALVE 



The independent brake valve receives air from the main 

 reservoir through a reducing valve so that the pressure in this 

 brake valve will not exceed 45 lb., the amount for which the 

 reducing valve is adjusted. It is connected to the exhaust port 

 of the distributing valve by the distributing- valve release pipe, 

 and to the automatic brake valve by the release pipe. Also, it 

 is connected to the application cylinder of the distributing valve 

 through the application-cylinder pipe, a T-connection being 

 placed in this pipe to which the application-cylinder pipe from 

 the automatic brake valve is coupled. 



The independent brake valve does not deliver air direct 

 to the brake cylinders, but passes it into and out of the appli- 

 cation cylinder of the distributing valve. This operates the 



