Hitachi ZX350LC-7, ZX350LCN-7 Hydraulic Excavator WDD750-EN-00 (Preview)
ZX350LC -7 1
WDD750-EN-00
INTRODUCTION
To The Reader
Additional References
Manual Composition
Page Number
Trademark
Safety Alert Symbol and Headline Notations
Units Used
SYMBOL AND ABBREVIATION
Symbol and Abbreviation
CONTRASTING LIST OF PART NAME
Contrasting List of Part Name between Technical Manual and Parts Catalog
SAFETY
Recognize Safety Information
Understand Signal Words
Follow Safety Instructions
Prepare for Emergencies
Wear Protective Clothing
Protect Against Noise
Inspect Machine
General Precautions for the Cab
Use Handrail and Steps
Adjust the Operator’s Seat
Ensure Safety Before Rising from or Leaving Operator’s Seat
Fasten Your Seat Belt
Move and Operate Machine Safely
Start the Engine Only from Operator’s Seat
Jump Starting
Keep Riders off Machine
Precautions for Operations
Perform Job Site Risk Assessment Beforehand
Install OPG Guard
Restriction of Attachment Installation
Provide Signals for Jobs Involving Multiple Machines
Confirm Direction of Machine Travel
Drive Machine Safely
Avoid Injury from Rollaway Accidents
Avoid Accidents from Reversing and Swing Operation
Keep People Clear from Working Area
Never Position the Bucket Over Anyone
Avoid Undercutting
Avoid Tipping
Never Undercut a High Bank
Dig with Caution
Caution with an Overhead Obstacle
Avoid Power Lines
Precautions for Lightning
Object Handling
Protect Against Flying Debris and Falling Object
Park Machine Safely
Handle Fluids Safely−Avoid Fires
Transport Safely
Practice Maintenance Safely
Warn Others of Service Work
Support Machine Properly
Stay Clear of Moving Parts
Prevent Parts from Flying
Avoid Injury from Attachment Falling Accident
Prevent Burns
Replace Rubber Hoses Periodically
Avoid High-Pressure Fluids
Prevent Fires
Check for Oil Leaks:
Check for Short circuits:
Clean up Flammable Materials:
Check Key Switch:
Check Heat Shields:
Evacuating in Case of Fire
Beware of Exhaust Fumes
Precautions for Welding and Grinding
Avoid Heating Near Pressurized Fluid Lines
Avoid Applying Heat to Lines Containing Flammable Fluids
Precautions for Handling Accumulator and Gas Damper
Remove Paint Before Welding or Heating
Beware of Asbestos and Silica Dust and Other Contamination
Prevent Battery Explosions
Service Air Conditioning System Safely
Handle Chemical Products Safely
Dispose of Waste Properly
Never Ride Attachment
Notes on Aftertreatment Device
Precautions for Communication Terminal
Precautions for Communication Terminal Equipment
Notes on Protection by Operator’s Station when the Machine Rolls Over
Before Returning the Machine to the Customer
SECTION AND GROUP CONTENTS
CONTENTS
GENERAL
Precautions for Disassembling and Assembling
Precautions for Disassembling and Assembling
Precautions for Using Floating Seal
Precautions for Using Nylon Sling
Maintenance Standard Terminology
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
Painting
Painting
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
Air Bleeding from the Diesel Exhaust Fluid Defrosting Piping
Preparation
Preparation before Inspection and Maintenance
Hydraulic Circuit Pressure Release Procedure
Pressure Release from Hydraulic Oil Tank
Pressure Release from Expansion Tank
MAINTENANCE STANDARD
Upperstructure
Maintenance Standard for Pump Device
Maintenance Standard for Swing Motor
Undercarriage
Maintenance Standard for Travel Motor
Maintenance Standard for Sprocket
Maintenance Standard of Front Idler
Maintenance Standard for Upper Roller
Maintenance Standard for Lower Roller
Maintenance Standard of Track
Front Attachment
Maintenance Standard for Pin and Bushing
Maintenance Standard for Side Cutter (2021232, 2021233)
Maintenance Standard for Point (4512365)
Maintenance Standard for Side Cutter (4435856, 4435857)
Maintenance Standard for Point (4400253)
Standard Dimensions for Arm and Bucket Connection
Standard Dimensions for Arm and Boom Connection
Maintenance Standard for Cylinder
ZX350LC -7 2
UPPERSTRUCTURE
Solenoid Valve
Removal of Pilot Shut-Off Solenoid Valve
Installation of Pilot Shut-Off Solenoid Valve
Disassembly of Pilot Shut-Off Solenoid Valve
Assembly of Pilot Shut-Off Solenoid Valve
Removal of 5-Spool Solenoid Valve Unit
Installation of 5-Spool Solenoid Valve Unit
Structure of 5-Spool Solenoid Valve Unit
Removal of 2-Spool Solenoid Valve Unit
Installation of 2-Spool Solenoid Valve Unit
Structure of 2-Spool Solenoid Valve Unit
Removal of 3-Spool Solenoid Valve Unit
Installation of 3-Spool Solenoid Valve Unit
Structure of 3-Spool Solenoid Valve Unit
Signal Control Valve
Removal of Signal Control Valve
Installation of Signal Control Valve
Structure of Signal Control Valve
Aftertreatment Device
Removal of Aftertreatment Device
Installation of Aftertreatment Device
DEF Tank
Removal of DEF Tank
Installation of DEF Tank
Removal of DEF Tank Suction Filter
Installation of DEF Tank Suction Filter
Removal of DEF Tank Water Supply Inlet Filter
Installation of DEF Tank Water Supply Inlet Filter
Assembly of DEF Tank Water Supply Inlet Filter
Coolant Control Valve
Removal of Coolant Control Valve
Installation of Coolant Control Valve
DEF Supply Module
Removal of DEF Supply Module
Installation of DEF Supply Module
UNDERCARRIAGE
Swing Bearing
Removal of Swing Bearing
Installation of Swing Bearing
Disassembly of Swing Bearing
Assembly of Swing Bearing
Travel Device
Removal of Travel Device
Installation of Travel Device
Disassembly of Travel Device
Assembly of Travel Device
Disassembly of Travel Motor
Assembly of Travel Motor
Disassembly of Brake Valve
Assembly of Brake Valve
Center Joint
Removal of Center Joint
Installation of Center Joint
Disassembly of Center Joint
Assembly of Center Joint
Replacement of Body and Spindle
Track Adjuster
Removal of Track Adjuster
Installation of Track Adjuster
Disassembly of Front Idler
Assembly of Front Idler
Disassembly of Track Adjuster
Assembly of Track Adjuster
Upper and Lower Rollers
Removal of Upper Roller
Installation of Upper Roller
Removal of Lower Roller
Installation of Lower Roller
Disassembly of Lower Roller
Assembly of Lower Roller
Track
Removal of Track
Installation of Track
FRONT ATTACHMENT
Front Attachment
Removal of Front Attachment
Installation of Front Attachment
Removal of Bucket
Installation of Bucket
Removal of Arm
Installation of Arm
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 Positioning Cylinder
Installation of Positioning Cylinder
Disassembly of Positioning Cylinder
Assembly of Positioning Cylinder
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 (Right)
Structure of Hose Rupture Valve for Boom Cylinder (Left)
Removal of Hose Rupture Valve for Arm Cylinder
Installation of Hose Rupture Valve for Arm Cylinder
Structure of Hose Rupture Valve for Arm Cylinder
Removal of Hose Rupture Valve for Positioning Cylinder
Installation of Hose Rupture Valve for Positioning Cylinder
Structure of Hose Rupture Valve for Positioning Cylinder
SERVICE MANUAL REVISION REQUEST FORM
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