UPPERSTRUCTURE / Control Valve 1 - Cap 12 - O-Ring 23 - O-Ring 34 - Cap 2 - O-Ring 13 - Cap 24 - Spool 35 - Cap 3 - Spring 14 - Cover 25 - Spring 36 - Cap 4 - Poppet 15 - Check Valve 26 - Cap 37 - O-Ring 5 - O-Ring 16 - Spring 27 - Backup Ring (5 Used) 38 - Socket Bolt (16 Used) 6 - Backup Ring 17 - O-Ring (5 Used) 28 - O-Ring (5 Used) 39 - Flange (4 Used) 7 - Sleeve 18 - Cap 29 - Check Valve (4 Used) 40 - O-Ring (4 Used) 8 - O-Ring 19 - O-Ring 30 - Spring (5 Used) 41 - Housing (5-Spool Side) 9 - Backup Ring 20 - Spring 31 - Check Valve (5 Used) 10 - Socket Bolt (4 Used) 21 - Poppet 32 - Cap 11 - Piston 22 - Cap 33 - Cap W2-5-17