136 



ENGINEER'S BRAKE VALVES 



press the upper clutch down as far as it will go; this will cause 

 it to take its proper position with respect to the lower clutch, 

 the two clutches fitting together. Next, remove the handle, 

 secure the cover in place, and replace the handle and secure 

 it by means of the handle nut. 



STRAIGHT-AIR BRAKE VALVES 



S-3 (f-IN.) STRAIGHT-AIR BRAKE VALVE 

 Piece and Reference Numbers. The S-3 (f-in.) straight-air 



J PIPE TO 



- DOUBLE -*! 



CHECK VALVE 



FIG. 1 



brake valve, shown in Fig. 1, is a part of, and is regularly 

 supplied with, the combined automatic and straight-air brake; 



