UPPERSTRUCTURE / Control Valve 1 - Housing (4-Spool Side) 18 - O-Ring (4 Used) 36 - Spring (3 Used) 53 - Spring 2 - Lock Nut (4 Used) 19 - Cap (2 Used) 37 - Check Valve (3 Used) 54 - Main Poppet 3 - Adjusting Screw (4 Used) 20 - O-Ring (2 Used) 38 - Adjusting Screw 55 - Sleeve 4 - O-Ring (4 Used) 21 - Spring Seat (2 Used) 39 - O-Ring 56 - Cap 5 - Spring (4 Used) 22 - Spring 40 - Lock Nut 57 - O-Ring (3 Used) 6 - Pilot Poppet (4 Used) 23 - Sleeve 41 - Piston 58 - Backup Ring 7 - Seat (4 Used) 24 - O-Ring (2 Used) 42 - Sleeve 59 - Cap 8 - Spring (4 Used) 25 - Spool (2 Used) 43 - O-Ring 60 - Spool 9 - O-Ring (4 Used) 26 - Piston (2 Used) 44 - O-Ring 61 - Spacer 10 - Backup Ring (8 Used) 27 - Backup Ring (2 Used) 45 - Lock Nut 62 - Spring 11 - O-Ring (4 Used) 28 - O-Ring (2 Used) 46 - Cap 63 - Cap 12 - Spring (4 Used) 29 - Sleeve 47 - O-Ring 64 - O-Ring 13 - Piston (4 Used) 30 - Spring 48 - Spring 65 - Cap 14 - Main Poppet (4 Used) 31 - Sleeve 49 - Pilot Poppet 66 - O-Ring 15 - Sleeve (4 Used) 32 - Sleeve 50 - Pilot Seat 67 - Cap 16 - O-Ring (4 Used) 33 - Backup Ring (2 Used) 51 - Backup Ring 17 - Backup Ring (4 Used) 34 - O-Ring (3 Used) 52 - O-Ring W2-5-33