UPPERSTRUCTURE / Control Valve Disassemble Housing 1. Remove all valves from the upper and lower surfaces at 5-spool side and 4-spool side. CAUTION: Control valve weight: 400 kg (880 lb) IMPORTANT: When placing housing (2) at 5-spool side or housing (1) at 4-spool side on the workbench, use the cloth in order not to damage. 2. Install eyebolts (M12, Pitch 1.75 mm) (2 used) into the hole on control valve. Hoist and place the control valve onto the workbench with housing (1) facing downward. 3. Remove socket bolt (9) and washer (8) from housing (2). : 14 mm CAUTION: Control valve weight: 400 kg (880 lb) 4. Hoist and place the control valve onto the workbench with housing (2) facing downward.
5. Remove socket bolts (9) (7 used), (10) (6 used) and washers (8) (13 used) from housing (1). : 14 mm CAUTION: Housing (1) weight: 200 kg (440 lb) 6. Install eyebolts (M12, Pitch 1.75 mm) (2 used) into the hole on housing (1). Hoist and remove housing (1) from housing (2) slowly. 7. Remove O-rings (3) (6 used), (4) (6 used), (5) (3 used) and (9) (3 used) from housing (2 or 1). W2-5-69