AUTOMATIC BLADE CONTROL KEY DESCRIPTION KEY DESCRIPTION 1 - ABC SYSTEM CONTROL CONSOLE 13 - SLOPE CONTROL UNIT 2 - RIGHT HAND CABLE 14 - CHAIN 3 - ACCESSORY RELAY [04D05] AUTOMATIC BLADE CONTROL 9032 670A, 672A, and 670A, 672A (Automatic Blade Control System) Graders PC1620 in GRADER, MOTOR 672A