UPPERSTRUCTURE / Control Valve Assemble Control Valve 4-Spool Side Assemble Right Travel Spool 1. Clamp spool (51) in a vise by using wooden pieces. Install spring seat (38), spring (39), spring seat (38) and bolt (41) to spool (51). Assemble Boom 1 Spool 6. Clamp spool (47) in a vise by using wooden pieces. Install poppet (49) and spring (45) to the bottom of spool (47). 7. Install O-ring (44) and backup ring (44) to plug (48). Apply LOCTITE #271 to the thread of part of plug (48). 8. Install plug (48) to spool (47) by using special tool (ST 5909). : 8 mm : 15 N m (1.5 kgf m, 11 lbf ft) Assemble Bucket Spool 2. Clamp spool (50) in a vise by using wooden pieces.
Install poppet (46) and spring (45) to the bottom of spool (50). 3. Install O-ring (44) and backup ring (43) to plug (42). Apply LOCTITE #271 to the thread of part of plug (42). 4. Install plug (42) to spool (50) by using special tool (ST 5909). : 15 N m (1.5 kgf m, 11 lbf ft) 9. Install spring seat (38), spring (39), spring seat (38) and bolt (41) to the upper of spool (47). : 8 mm : 15 N m (1.5 kgf m, 11 lbf ft) Assemble Arm 2 Spool 10. Clamp spool (37) in a vise by using wooden pieces. Install spring seats (38, 52), springs (39, 53), spring seats (52, 38) and bolt (41) to spool (37). : 15 N m (1.5 kgf m, 11 lbf ft) ST 5909 : 8 mm W157-02-05-049 5.
Install spring seat (38), spring (39), spring seat (38) and bolt (41) to the upper of spool (50). : 15 N m (1.5 kgf m, 11 lbf ft) 11. Install O-rings (59) (4 used) to housing (1). Install caps (67) (3 used) and (64) to housing (1) with socket bolts (63) (8 used). : 8 mm : 15 N m (1.5 kgf m, 11 lbf ft) W2-5-23