1. TechnicalBulletin Bulletin No PRO 03 13 Effective Date 2 28 78 Cancels N A Page 1 of 1 Subject D 1 TO E 1 BRAKE VALVE CONVERSION Remanufactured D 1 Brake Valves and D 1 service parts are no longer available however in many cases a conversion to the E 1 can be made with only minor piping changes The conversion list below covers the historically more popular D 1 Brake Valves D 1 Brake E 1 Brake Valve Type Valve Adapter Required 223349 Treadle 228429 237221 223485 Treadle 228429 237221 223511 Basic 226944 None 223856 Treadle Horizontal 228429 237221 Mounting Bracket 224156 Actuating Arm 228429 237079 224878 Lever 227282 None 225143 Treadle 228429 237221 Treadle lever assembly from D 1 must be re used