ENGINEER'S BRAKE VALVES 



149 



and that should be well rubbed on with the fingers. If too 

 much or too heavy oil is used on these parts, it will get into 

 the grooves of the piston and act as an oil packing and will 

 interfere very materially with the action of the feed-valve. 

 The regulating valve should not be oiled, but should be 

 replaced dry. 



PIPES, 



BRACKETS, AND 

 COCKS 



REVERSING 



PIPE BRACKETS 



When the feed-valve is placed in the piping of a brake equip- 

 ment instead of on the brake valve, as in the ET and the SWA 

 equipments, a pipe bracket to which the feed- valve is attached 

 must be used. 



/i'Bo 



(T F, Q 



^i i v. 



FlG. I 



F, Crossed-Passage, Pipe Bracket. The P pipe bracket 

 shown in Fig. 1 is the standard for the ET locomotive brake 

 equipment, and is regularly furnished therewith unless other- 

 wise specified on orders; its weight is oi Ib. The piece number 

 of the F crossed-passage, pipe bracket, complete, is 18,240; of 

 the F pipe-bracket body, 18,239; and of the stud and nut, 

 2,305. The reference number of the pipe-bracket body is 2; 

 and of the stud and nut, 3. 



