86 



AIR COMPRESSORS 



maximum-pressure head, complete, 20,782. The piece and ref- 

 erence numbers of the various parts are given in the accompany- 

 ing list. The SF-5 (IJ-in.) duplex steam compressor governor 

 is recommended with all locomotive brake equipments that 

 include two 9|-in., one 11-in., or one 8^-in. cross-compound 

 air compressor. If -in. iron pipe is to be used for the air 

 connections, specify Piece No. 18,672, for type SF-5 steam 

 compressor governor, complete; Piece No. 13,552, for excess- 

 pressure head, complete; and Piece No. 2,047, for maximum- 

 pressure head, complete; union swivel, Ref. No. 40, will then 

 be substituted for union swivel, Ref. No. 30, and union con- 

 nection, Piece No. 20,485, which includes Ref. Nos. 37, 38, 39, 

 will be omitted. 



!Vo. Name of Part 



Steam-valve body. 

 Cylinder body. 

 Cylinder cap. 

 Steam valve, complete. 

 Piston, includes 7, for standard cj'linder, 



2f in. diameter. 

 Piston, includes 7, for rebored cylinder, 



2ff in. diameter. 

 Piston, includes 7, for rebored cylinder, 



2| in. diameter. 

 Piston, includes 7, for rebored cylinder, 



2f in. diameter. 

 Piston, includes 7, for rebored cylinder, 



2 1 in. diameter. 

 Piston ring, for standard cylinder, 2f in. 



diameter. 

 Piston ring for rebored cylinder, 2ff in. 



diameter. 

 Piston ring for rebored cylinder, 2H in. 



diameter. 

 Piston ring for rebored cylinder, 2f| in. 



diameter. 

 Piston ring for rebored cylinder, 2$ in. 



diameter. 

 Piston nut. 

 Piston ring, 

 li-in. union nut. 

 11-in. union swivel. 

 Siamese fitting. 



Diaphragm body, includes 29. 

 Spring box for maximum-pressure head. 

 Check-nut for maximum-pressure head. 



