Hitachi ZX48U-6 Excavator WAEP50-EN-00 (2019.09.13) (Preview)
WAEP50-EN-00
INTRODUCTION
SYMBOL AND ABBREVIATION
SAFETY
SECTION AND GROUPCONTENTS
CONTENTS
SECTION1 GENERAL
Group1 Precautions
Precautions for Disassembling and Assembling
Precautions for Using Floating Seal
Precautions for Using Nylon Sling
Maintenance Standard Terminology
Group2 Tightening
Tightening Bolts and Nuts
Bolt Types
Specified Tightening Torque Chart
Tightening Order
Precautions for Spilt Flange
Nut and Bolt Locking
Tightening Piping Joint
Union Joint
Pipe Joint
O-Ring Face Seal Joint
Quick Coupling
Screw-In Connection
Seal Tape Application
Low-Pressure-Hose Clamp Tightening
Connecting Hose
Group3 Painting
Painting
Group4 Bleeding Air
Bleeding Air from Hydraulic System
Bleeding Air from Pump
Bleeding Air from Travel Motor, Swing Motor
Bleeding Air from Hydraulic Circuit
Bleeding Air from Fuel System
Bleeding Air from Radiator
Group5 Preparation
Preparation before Inspection and Maintenance
Hydraulic Circuit Pressure Release Procedure
Pressure Release from Hydraulic Oil Tank
SECTION2 MAINTENANCE STANDARD
Group1 UPPERSTRUCTURE
Maintenance Standard for Pump Device
Maintenance Standard for Swing Motor
Group2 UNDERCARRIAGE
Maintenance Standard for Travel Motor
Maintenance Standard for Sprocket
Maintenance Standard for Front Idler
Maintenance Standard for Upper Roller
Maintenance Standard for Lower Roller
Maintenance Standard for Track (Rubber Crawler)
Maintenance Standard for Track (Steel Crawler)
Group3 Front Attachment
Maintenance Standard for Pin and Bushing
Maintenance Standard for Side Cutter (4622021, 4626430)
Maintenance Standard for Point (4080730)
Standard Dimensions for Arm and Bucket Connection
Maintenance Standard for Cylinder
SECTION3 UPPERSTRUCTURE
Group1 Cab
Removal of 4-Pillars Canopy
Installation of 4-Pillars Canopy
Removal of Cab
Installation of Cab
Dimensions of Cab Glass
Procedure to Remove Cab Glass and Overhead Window
Procedure to Install Cab Glass
Procedure to Install Overhead Window
Procedure to Install Front Window Glass
Group2 Counterweight
Removal of Counterweight
Installation of Counterweight
Group3 Pump Device
Removal of Pump Device
Installation of Pump Device
Disassembly of Pump Device
Assembly of Pump Device
Group4 Control Valve
Assembly of Unload Section
Removal of Control Valve
Installation of Control Valve
Structure of Control Valve
Disassembly of Body
Assembly of Body
Disassembly of Unload Section
Assembly of Unload Section
Disassembly of Boom Anti-Drift Valve
Assembly of Boom Anti-Drift Valve
Disassembly of Spool
Assembly of Spool
Disassembly of Shuttle Valve and Pressure Compensator
Assembly of Shuttle Valve and Pressure Compensator
Group5 Swing Device
Removal of Swing Device
Installation of Swing Device
Disassembly of Swing Reduction Gear
Assembly of Swing Reduction Gear
Disassembly of Swing Motor
Assembly of Swing Motor
Group6 Pilot Valve
Removal of Pilot Valve (Left)
Installation of Pilot Valve (Left)
Removal of Pilot Valve (Right)
Installation of Pilot Valve (Right)
Disassembly of Pilot Valves (Left and Right)
Assembly of Pilot Valves (Left and Right)
Removal of Travel Pilot Valve
Installation of Travel Pilot Valve
Disassembly of Travel Pilot Valve
Assembly of Travel Pilot Valve
Removal of Boom Swing Pilot Valve
Installation of Boom Swing Pilot Valve
Disassembly of Boom Swing Pilot Valve
Assembly of Boom Swing Pilot Valve
Removal of Blade Pilot Valve
Installation of Blade Pilot Valve
Disassembly of Blade Pilot Valve
Assembly of Blade Pilot Valve
Removal of Auxiliary Pilot Valve
Installation of Auxiliary Pilot Valve
Disassembly of Auxiliary Pilot Valve
Assembly of Auxiliary Pilot Valve
Group7 Solenoid Valve
Removal of 2-Spool Solenoid Valve
Installation of 2-Spool Solenoid Valve
Disassembly of 2-Spool Solenoid Valve
Assembly of 2-Spool Solenoid Valve
Removal of LS Cut Solenoid Valve
Installation of LS Cut Solenoid Valve
Disassembly of LS Cut Solenoid Valve
Assembly of LS Cut Solenoid Valve
Removal of Torque Control Solenoid Valve (Only Machine with Air Conditioner (Option)Attached)
Installation of Torque Control Solenoid Valve (Only Machine with Air Conditioner (Option)Attached)
Disassembly of Torque Control Solenoid Valve (Only Machine with Air Conditioner (Option)Attached)
Assembly of Torque Control Solenoid Valve (Only Machine with Air Conditioner (Option)Attached)
Group8 Revolution Sensing Valve
Removal of Revolution Sensing Valve
Installation of Revolution Sensing Valve
Disassembly of Revolution Sensing Valve
Assembly of Revolution Sensing Valve
Group9 Muffler Filter
Removal of Muffler Filter
Installation of Muffler Filter
Disassembly of Muffler Filter
Assembly of Muffler Filter
SECTION4 UNDERCARRIAGE
Group1 Swing Bearing
Removal of Swing Bearing
Installation of Swing Bearing
Group2 Travel Device
Removal of Travel Device
Installation of Travel Device
Disassembly of Travel Device
Assembly of Travel Device
Disassembly of Brake Valve
Assembly of Brake Valve
Group3 Center Joint
Removal of Center Joint
Installation of Center Joint
Disassembly of Center Joint
Assembly of Center Joint
Group4 Track Adjuster
Removal of Track Adjuster
Installation of Track Adjuster
Disassembly of Track Adjuster
Assembly of Track Adjuster
Group5 Front Idler
Removal of Front Idler
Installation of Front Idler
Disassembly of Front Idler
Assembly of Front Idler
Group6 Upper and Lower Rollers
Removal of Upper Roller
Installation of Upper Roller
Removal of Lower Roller
Installation of Lower Roller
Group7 Track
Removal of Track (Rubber Crawler)
Installation of Track (Rubber Crawler)
Removal of Track (Steel Crawler)
Installation of Track (Steel Crawler)
Group8 Blade Cylinder
Removal of Blade Cylinder
Installation of Blade Cylinder
Disassembly of Blade Cylinder
Assembly of Blade Cylinder
SECTION5 FRONT ATTACHMENT
Group1 Front Attachment
Removal of Front Attachment
Installation of Front Attachment
Group2 Cylinder
Removal of Boom Cylinder
Installation of Boom Cylinder
Disassembly of Boom Cylinder
Assembly of Boom Cylinder
Removal of Arm Cylinder
Installation of Arm Cylinder
Disassembly of Arm Cylinder
Assembly of Arm Cylinder
Removal of Bucket Cylinder
Installation of Bucket Cylinder
Disassembly of Bucket Cylinder
Assembly of Bucket Cylinder
Removal of Boom Swing Cylinder
Installation of Boom Swing Cylinder
Disassembly of Boom Swing Cylinder
Assembly of Boom Swing Cylinder
Group3 Hose Rupture Valve
Removal of Hose Rupture Valve for Boom Cylinder
Installation of Hose Rupture Valve for Boom Cylinder
Structure of Hose Rupture Valve for Boom Cylinder
Removal of Hose Rupture Valve for Arm Cylinder
Installation of Hose Rupture Valve for Arm Cylinder
Structure of Hose Rupture Valve for Arm Cylinder
SERVICE MANUAL REVISION REQUEST FORM
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