BENDIX 03-A-5B User's Manual
Contents
1. For Service Maintenance information see Service Data Sheet SD 03 43 MAINTENANCE KIT PC NO 287691 WEIGHT 2 6 LBS VMRS NO IS 13 010 048 DEVICE CODE IS 4510 DESCRIPTION Control Piston 0 Ring Cover 0 Ring Spring Valve Includes Cup 238381 0 Ring Inlet Valve Spring Pipe Plug 34 Check Valve Assy Check Valve Check Valve Spring Machine Screw SR 2 TRAILER FOR SERVICE RETAINER DIAPHRAGM WASHER SCREW FITTING A SPRING BRAKE OR REMFR PIPE TAD VALVE EXCH USE SIZE PC NO PC NO PC NO PC NO PC NO PC NO PC NO NONE 291159 Y 246370 291159 y NONE 292048 y 287375 287376 287376 287376 B288497 288497 NONE NONE NONE 246367 246368 246369 NONE NONE NONE B Add Two 2 Pipe Plug 238807 34 in two bottom del ports OCTOBER 19862. vA P T SER RES PORTS 2 a SERVICE PARTS SR 2 TRAILER SPRING BRAKE VALVE catacocQ3 A 5B RETAINER DIAPHRAGM WASHER ah PT esooy PARTIAL VIEW OF EXHAUST DELIVERY WIDTH FOR PC NO 287376 PORTS 4 l 2 3 10 5 54 mE He ll Ni ea E gt E i i 13 a ei ro ball i 14 igre ii wae tit pte Lill 2 ga 16 P T a SP BRK RES i P T PORT TRLR gt O oo Oonmt MD OS WPNFe SFrrrrr gt rgr 291154 203706 202981 A PC NO QUAN 1 1 1 1 1 1 1 1 1 l 4 4 1 17 34 PLT SUPPLY EXHAUST PORT 5 47 COMMON SERVICE PARTS DESCRIPTION PC NO Spring 291156 Spring Retainer A Piston Assy 291157 Piston Inlet Valve Spring O Ring Retaining Ring Stem Inlet amp Exhaust Valve Body Cap Screw Lock Washer Sealing Ring 243683 A Furnished in Maintenance Kit 287691 SUB ASSY AND DETAIL REFERENCE QUAN amp B DO PO DO e rR N e The SR 2 is a key valve in the 121 Trailer Air Brake System Generally installed in the required spring brake release reservoir it is responsible for controlling the application and release of the spring brakes both during emergency situations and normal parking It protects and isolates the spring brake reservoir preventing automatic brake application in the event of trailer service system failure The SR 2 also provides the ability to release the trailer spring brakes at least once subsequent to their application
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