UPPERSTRUCTURE / 4-Spool Solenoid Valve Unit STRUCTURE OF 4-SPOOL SOLENOID VALVE UNIT 1 W1V1-02-10-001 9 3 10 11 12 13 14 15 16 17 18 19 20 21 24 23 22 34 33 32 31 30 29 28 27 26 25 T1V1-03-07-008 W2-10-2 1 1 2 3 4 2 3 3 5,6 7 1 1 Detail for Position A