UPPERSTRUCTURE / 4-Spool Solenoid Valve Unit REMOVE AND INSTALL 4-SPOOL SOLENOID VALVE IMPORTANT: Release any pressure in the hydraulic oil tank before doing any work. (Refer to BLEED AIR FROM HYDRAULIC OIL TANK on W1-4-1.) Removal 1. Open the engine cover. Remove bolts (3) (4 used). Remove covers (1, 2). 2. Attach identification tags to all the removed hoses for reassembling. Remove all wirings and hoses from 4-spool solenoid valve unit (4). Cap all the hoses. : 17 mm W1V7-02-08-001 : 17 mm, 19 mm 3. Remove socket bolts (5) (2 used). Remove 4-spool solenoid valve unit (4) from the control valve. : 8 mm Installation 1.
Install 4-spool solenoid valve unit (4) to the control valve with socket bolts (5) (2 used). 4 W1V1-02-05-021 Control Valve Front t : 50 N m (5.0 kgf m, 37 lbf ft) 2. Install all wirings and hoses to 4-spool solenoid valve unit (4). : 8 mm 4 : 17 mm : 25 N m (2.5 kgf m, 18 lbf ft) : 30 N m (3.0 kgf m, 22 lbf ft) 3. Install covers (1, 2) with bolts (3) (4 used). : 19 mm : 17 mm 5 : 50 N m (5.0 kgf m, 37 lbf ft) W1V1-02-10-004 W2-10-1 2 1 3