Hitachi ZX155W-7 Wheeled Excavator WLBS50-EN-00 (2021.08.30) (Preview)
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 to Be Driven
– 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
– Support Maintenance Properly
– 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
– Operation Stop Alarm (ZX135W-7/150W-7/155W-7/175W-7)
– 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
— Bleeding Air from Swing Motor
— Bleeding Air from Hydraulic Circuit
— Bleeding Air from Fuel System
— Air Bleeding from the DEF Defrosting Piping
— Bleeding Air from Transmission
— Bleeding Air from Brake (Axle)
– Preparation
— Preparation before Inspection and Maintenance
— Hydraulic Circuit Pressure Release Procedure
— Pressure Release from Hydraulic Oil Tank
— Pressure Release from Expansion Tank
— Pressure Release from Brake Circuit
MAINTENANCE STANDARD
– Upperstructure
— Maintenance Standard for Pump Device
— Maintenance Standard for Swing Motor
— Maintenance Standard for Swing Parking Brake
– Undercarriage
— Maintenance Standard for Center Joint
– Front Attachment
— Maintenance Standard for Pin and Bushing
— Maintenance Standard for Side Cutter (2015428, 2015429)
— Maintenance Standard for Point (963228)
— Standard Dimensions for Arm and Bucket Connection
— Standard Dimensions for Arm and Boom Connection
UPPERSTRUCTURE
– Cab
— Removal of Cab Interior Parts
— Removal of Cab Exterior Parts
— Removal of Wiper
— Removal of Cab Body
— Removal of Controller Assembly and Parts Around the Monitor
— Installation of Controller Assembly and Parts Around the Monitor
— Installation of Cab Body
— Installation of Wiper
— Installation of Cab Exterior Parts
— Installation of Cab Interior Parts
— Dimensions of Cab Glass
— Procedure to Remove Cab Glass
— Procedure to Install Cab Glass
— Procedures to Install Upper Door Glass
— Procedures to Install Upper Front Glass
– Counterweight
— Removal of Counterweight
— Installation of Counterweight
– Main Frame
— Removal of Main Frame
— Installation of Main Frame
– Engine
— Preparation before Removal of Engine
— Removal of Covers and Related Parts Around the Engine
— Removal of Wire Harnesses and Hoses Around the Engine
— Removal of Engine Body
— Installation of Engine Body
— Installation of Wire Harnesses and Hoses Around the Engine
— Installation of Related Parts of the Engine
— Work after Engine Installation and Covers Installation
– Radiator Assembly
— Removal of Radiator
— Installation of Radiator
– Hydraulic Oil Tank
— Removal of Hydraulic Oil Tank
— Installation of Hydraulic Oil Tank
– Fuel Tank
— Removal of Fuel Tank
— Installation of Fuel Tank
– Pump Device
— Removal of Pump Device
— Installation of Pump Device
— Removal of Coupling
— Installation of Coupling
— Disassembly of Pump Device
— Assembly of Pump Device
— Disassembly of Regulator
— Assembly of Regulator
— Disassembly of Solenoid Valve
— Assembly of Solenoid Valve
— Removal and Installation of Pilot Pump
— Structure of Pilot Pump
— Structure of Steering Pump and Assist Pump
– Control Valve
— Removal of Control Valve
— Installation of Control Valve
— Structure of Control Valve
— Disassembly of Housing A Upper Side
— Assembly of Housing A Upper Side
— Disassembly of Housing B Upper Side (1)
— Assembly of Housing B Upper Side (1)
— Disassembly of Housing B Upper Side (2)
— Assembly of Housing B Upper Side (2)
— Disassembly of Housings A and B Lower Side
— Assembly of Housings A and B Lower Side
— Disassembly of Housing Right Side
— Assembly of Housing Right Side
— Disassembly of Housing Left Side
— Assembly of Housing Left Side
— Disassembly and Assembly of Spools
— Disassembly and Assembly of Make-Up Valve
— Disassembly and Assembly of Relief Valve
— Disassembly and Assembly of Housing
– 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
— Disassembly of Valve Unit
— Assembly of Valve Unit
— Structure of Swing Dampener Valve
– 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
– 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 Axle Lock/Brake Solenoid Valve Unit
— Installation of Axle Lock/Brake Solenoid Valve Unit
— Structure of Axle Lock/Brake Solenoid Valve Unit
— Removal of Pump 1/Pump 2 Flow Rate Control Solenoid Valve Unit
— Installation of Pump 1/Pump 2 Flow Rate Control Solenoid Valve Unit
— Structure of Pump 1/Pump 2 Flow Rate Control Solenoid Valve Unit
— Removal of 7-Spool Solenoid Valve Unit and 2-Spool Solenoid Valve Unit (For Assist) (Option)
— Installation of 7-Spool Solenoid Valve Unit and 2-Spool Solenoid Valve Unit (For Assist) (Option)
— Structure of 7-Spool Solenoid Valve Unit
— Structure of 2-Spool Solenoid Valve Unit (For Assist) (Option)
— Removal of 3-Spool Solenoid Valve Unit 1
— Installation of 3-Spool Solenoid Valve Unit 1
— Structure of 3-Spool Solenoid Valve Unit 1
— Removal of 3-Spool Solenoid Valve Unit 2
— Installation of 3-Spool Solenoid Valve Unit 2
— Structure of 3-Spool Solenoid Valve Unit 2
— Removal of Cruise Control Solenoid Valve
— Installation of Cruise Control Solenoid Valve
— Structure of Cruise Control Solenoid Valve Unit
— Removal of Cruise Stop Solenoid Valve
— Installation of Cruise Stop Solenoid Valve
— Structure of Cruise Stop Solenoid Valve
– 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
– Shockless Valve
— Removal of Swing Shockless Valve
— Installation of Swing Shockless Valve
— Structure of Swing Shockless Valve
— Removal of Travel Shockless Valve
— Installation of Travel Shockless Valve
— Structure of Travel Shockless Valve
– Electric Lever
— Removal of Auxiliary/Positioning Pedal (Electric Lever)
— Installation of Auxiliary/Positioning Pedal (Electric Lever)
— Disassembly of Auxiliary/Positioning Pedal (Electric Lever)
— Assembly of Auxiliary/Positioning Pedal (Electric Lever)
— Removal of Blade/Outrigger Lever (Electric Lever)
— Installation of Blade/Outrigger Lever (Electric Lever)
– Steering Valve
— Removal of Steering Valve
— Installation of Steering Valve
— Disassembly of Steering Valve
— Assembly of Steering Valve
– Brake Valve
— Removal of Brake Valve
— Installation of Brake Valve
— Disassembly of Brake Valve
— Assembly of Brake Valve
– Accumulator Charge Valve
— Removal of Accumulator Charging Valve
— Installation of Accumulator Charging Valve
— Structure of Accumulator Charging Valve
– Accumulator Manifold
— Removal of Accumulator Manifold
— Installation of Accumulator Manifold
— Structure of Accumulator Manifold
– Lights
— Removal of Headlight/Clearance Light/Turn Signal Light (Left)
— Installation of Headlight/Clearance Light/Turn Signal Light (Left)
— Removal of Headlight/Clearance Light/Turn Signal Light (Right)
— Installation of Headlight/Clearance Light/Turn Signal Light (Right)
— Removal of Tail Light/Brake Light/Turn Signal Light/Reverse Light
— Installation of Tail Light/Brake Light/Turn Signal Light/Reverse Light
— Removal of License Plate Light
— Installation of License Plate Light
UNDERCARRIAGE
– Swing Bearing
— Removal of Swing Bearing
— Installation of Swing Bearing
— Disassembly of Swing Bearing
— Assembly of Swing Bearing
– Travel Motor
— Removal of Travel Motor
— Installation of Travel Motor
— Disassembly of Travel Motor
— Assembly of Travel Motor
— Disassembly of Travel Brake Valve
— Assembly of Travel Brake Valve
– Center Joint
— Removal of Center Joint
— Installation of Center Joint
— Disassembly of Center Joint
— Assembly of Center Joint
– Transmission
— Removal and Installation of Transmission
— Disassembly of Transmission
— Assembly of Transmission
– Axle
— Removal of Front Axle
— Installation of Front Axle
— Disassembly of Front Axle
— Assembly of Front Axle
— Removal of Rear Axle and Transmission
— Installation of Rear Axle and Transmission
— Disassembly of Rear Axle
— Assembly of Rear Axle
— Disassembly of Differential
— Assembly of Differential
— Disassembly of Steering Cylinder
— Assembly of Steering Cylinder
— Removal of Tie Rod
— Installation of Tie Rod
— Adjustment of Steering
– Axle Lock Cylinder
— Removal of Axle Lock Cylinder
— Installation of Axle Lock Cylinder
— Disassembly of Axle Lock Cylinder
— Assembly of Axle Lock Cylinder
– Operate Check Valve
— Removal of Operate Check Valve (For Axle Lock Cylinder)
— Installation of Operate Check Valve (For Axle Lock Cylinder)
— Structure of Operate Check Valve (For Axle Lock Cylinder)
— Removal of Operate Check Valve (For Blade Cylinder)
— Installation of Operate Check Valve (For Blade Cylinder)
— Removal of Operate Check Valve (For Outrigger Cylinder)
— Installation of Operate Check Valve (For Outrigger Cylinder)
— Structure of Operate Check Valve (For Blade/Outrigger Cylinder)
– Solenoid Valve
— Removal of 2-Spool Solenoid Valve Unit (For Blade/Outrigger Cylinder)
— Installation of 2-Spool Solenoid Valve Unit (For Blade/Outrigger Cylinder)
— Structure of 2-Spool Solenoid Valve Unit (For Blade/Outrigger Cylinder)
— Removal of Transmission Control Solenoid Valve
— Installation of Transmission Control Solenoid Valve
– Propeller Shaft
— Removal of Propeller Shaft
— Installation of Propeller Shaft
– Cylinder
— Removal of Blade Cylinder
— Installation of Blade Cylinder
— Disassembly of Blade Cylinder
— Assembly of Blade Cylinder
— Removal of Outrigger Cylinder
— Installation of Outrigger Cylinder
— Disassembly of Outrigger Cylinder
— Assembly of Outrigger Cylinder
– Tire
— Removal of Tire
— Installation of Tire
— Disassembly of Tire Assembly
— Assembly of Tire Assembly
FRONT ATTACHMENT
– Front Attachment
— Removal of Front Attachment (Mono Boom)
— Installation of Front Attachment (Mono Boom)
— Removal of Front Attachment (2-Piece Boom)
— Installation of Front Attachment (2-Piece Boom)
– Cylinder
— Removal of Boom Cylinder (Mono Boom)
— Installation of Boom Cylinder (Mono Boom)
— Removal of Boom Cylinder (2-Piece Boom)
— Installation of Boom Cylinder (2-Piece Boom)
— Disassembly of Boom Cylinder (Mono Boom)
— Assembly of Boom Cylinder (Mono Boom)
— Disassembly of Boom Cylinder (2-Piece Boom)
— Assembly of Boom Cylinder (2-Piece Boom)
— Removal of Arm Cylinder (Mono Boom)
— Installation of Arm Cylinder (Mono Boom)
— Removal of Arm Cylinder (2-Piece Boom)
— Installation of Arm Cylinder (2-Piece Boom)
— 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 (Mono Boom)
— Installation of Hose Rupture Valve for Boom Cylinder (Mono Boom)
— Removal of Hose Rupture Valve for Boom Cylinder (2-Piece Boom)
— Installation of Hose Rupture Valve for Boom Cylinder (2-Piece Boom)
— Structure of Hose Rupture Valve for Boom Cylinder (Mono Boom Right) (2-Piece Boom Left)
— Structure of Hose Rupture Valve for Boom Cylinder (Mono Boom Left) (2-Piece Boom Right)
— Removal of Hose Rupture Valve for Arm Cylinder (Mono Boom)
— Installation of Hose Rupture Valve for Arm Cylinder (Mono Boom)
— Removal of Hose Rupture Valve for Arm Cylinder (2-Piece Boom)
— Installation of Hose Rupture Valve for Arm Cylinder (2-Piece Boom)
— Structure of Hose Rupture Valve for Arm Cylinder (Mono Boom)
— Structure of Hose Rupture Valve for Arm Cylinder (2-Piece Boom)
— 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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