SECTION 2 BODY (UPPERSTRUCTURE) CONTENTS Group 1 Cab Remove and Install Cab.............................. W2-1-1 Group 2 Counterweight Remove and Install Counterweight............. W2-2-1 Group 3 Center Hinge Disassemble Center Hinge ......................... W2-3-1 Assemble Center Hinge.............................. W2-3-6 Group 4 Hood Removal and Installation of Hood............... W2-4-1 Group 5 Hydraulic Oil Tank Removal and Installation of Hydraulic Oil Tank ..................................... W2-5-1 Group 6 Pump Device Removal and Installation of Pump Device.............................................
W2-6-1 Removal and Installation of Pilot Pump and Regulator ......................... W2-6-8 Disassembly of Main Pump ...................... W2-6-12 Assembly of Main Pump ........................... W2-6-14 Disassembly of Regulator......................... W2-6-20 Assembly of Regulator.............................. W2-6-22 Disassembly of Priority Valve.................... W2-6-24 Assembly of Priority Valve ........................ W2-6-26 Structure of Pilot Pump ............................. W2-6-28 Maintenance Standard..............................
W2-6-30 Group 7 Control Valve Removal and Installation of Control Valve (ZW220) ..............................W2-7-1 Removal and Installation of Control Valve (ZW250) ..............................W2-7-6 Disassembly of Control Valve (ZW220)...................................................W2-7-12 Assembly of Control Valve (ZW220) .........W2-7-16 Disassembly of Control Valve (ZW250)...................................................W2-7-22 Assembly of Control Valve (ZW250) .........W2-7-26 Group 8 Pilot Valve Removal and Installation of Pilot Valve .......W2-8-1 Disassembly of Standard Pilot Valve for Front Attachment .......................................W2-8-4 Assembly of Standard Pilot Valve for Front Attachment .....................................W2-8-12 Maintenance Standard ..............................W2-8-20 Disassembly of Joy-Stick Type Pilot Valve for Additional Circuit (Optional)................W2-8-22 Assembly of Joy-Stick Type Pilot Valve for Additional Circuit (Optional)................W2-8-26 Disassembly of 2-Way Lever Type Pilot Valve for Additional Circuit (Optional)......W2-8-30 Assembly of 2-Way Lever Type Pilot Valve for Additional Circuit...............W2-8-32 Group 9 Pilot Shut-Off Valve Removal and Installation of Pilot Shut-Off Valve....................................W2-9-1 Disassembly of Pilot Shut-Off Valve............W2-9-4 Assembly of Pilot Shut-Off Valve.................W2-9-6 4GCW-2-1