Technical Manual Hitachi ZX180W-7 Wheeled Excavator TOLBN50-EN-00 (Preview)
TOLBN50-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
SECTION AND GROUP CONTENTS
CONTENTS
GENERAL
Specifications
Specifications ZX180W-7
Specifications ZX180W-7 (Standard Gauge, Rear Blade)
Specifications ZX180W-7 (Standard Gauge, Rear Outrigger)
Specifications ZX180W-7 (Standard Gauge, Front Blade, Rear Outrigger)
Specifications ZX180W-7 (Standard Gauge, Front Outrigger, Rear Blade)
Specifications ZX180W-7 (Standard Gauge, Front Outrigger, Rear Outrigger)
Working Ranges ZX180W-7 Monoblock Boom
Working Ranges ZX180W-7 2-Piece Boom
Component Layout
Main Component (Upperstructure)
Main Component (Undercarriage)
Main Component (Front Attachment)
Electrical System (Overview)
Electrical System (Cab)
Electrical System (Switches)
Electrical System (Rear Tray)
Relay Layout
Electrical System (Utility Space)
Electrical System (Relays)
Electrical System (Lights)
Engine Oil Monitoring Sensor
Hydraulic Oil Monitoring Sensor
Engine
Aftertreatment Device
Pump Device
Around Pump Device
Control Valve
Signal Control Valve
Swing Shockless Valve
Swing Device
Accumulator Charging Valve
Travel Shockless Valve
Travel Device
Brake Valve
7-Spool Solenoid Valve Unit
3-Spool Solenoid Valve Unit 1
3-Spool Solenoid Valve Unit 2
2-Spool Solenoid Valve Unit (For Assist) (Option)
2-Spool Solenoid Valve Unit (For Blade/Outrigger Cylinder) (Front) (Option)
2-Spool Solenoid Valve Unit (For Blade/Outrigger Cylinder) (Rear) (Option)
Pump 1 and Pump 2 Flow Rate Control Solenoid Valve Unit
Axle Lock/Brake Solenoid Valve Unit
Transmission Control Solenoid Valve
Cruise Stop Solenoid Valve
Cruise Control Solenoid Valve
Around DEF Tank
Layout of Attachment Spec. Parts
Auxiliary Control Solenoid Valve Unit
Breaker Relief Solenoid Valve
Selector Valve Control Valve
Component Specifications
Specifications of Engine
Specifications of Engine Accessories
Specifications of Hydraulic Component
Specifications of Electrical Component
SYSTEM
Controller
Outline of Controller
CAN Circuit
Control System
Outline of Control System
Engine Control
Engine Control System Layout
Engine Protection Control
Engine Control Dial Control
ECO Control
Power Mode (ECO/PWR Mode) Switch Control
ECO Mode Control
Travel HP Mode Control
Engine Speed Holding Control When Decelerating
Auto-Idle Control
Hydraulic Oil Temperature Auto Warming-Up Control
Radiator Coolant Temperature Auto Warming-Up Control
Idle Speed-Up Control
Engine Speed Slow Down Control
Heater Control
One-Touch Idle Control
Attachment Operation Speed Increase Control (Option)
Attachment Operation Speed Limit Control (Option)
Pump Control
Pump Control System Layout
Speed Sensing Control
Travel Speed Sensing Control
Pump Torque Decrease Control (Radiator Coolant Temperature)
Pump Torque Decrease Control (Hydraulic Oil Temperature)
Digging Torque Increase Control
Pump Torque Increase Control (Swing and Boom Raise)
Steering Pump Torque Decrease Control
Pump Torque Restriction Control (During Engine Output Restriction)
Pump 1 Flow Rate Limit Control at Creeper Mode Travel Speed
Pump 1 Flow Rate Control
Pump 2 Flow Rate Control
Pump 1 Flow Rate Limit Control (Option)
Pump 2 Flow Rate Limit Control (Option)
Valve Control (Standard) (MC)
Valve Control (Standard) (MC) System Layout
Power Digging Control
Auto-Power Lift Control
Arm Regenerative Control
Arm 1 Flow Rate Control
Arm 2 Roll-In Pilot Cut Control
Aftertreatment Device Manual Regeneration Control
Pump 1 Center Bypass Shut-Out Control
Pump 2 Center Bypass Shut-Out Control
Travel Make-Up Pressure Control
Valve Control (Standard) (PLCU)
Valve Control (Standard) (PLCU) System Layout
Travel Motor Excessive Speed Control
Travel Motor Displacement Angle Control
Creeper Mode Travel Speed Control
Working Brake Control
Auto Axle Lock Control
Automatic Working Brake Control
Cruise Control
Valve Control (Option) (MC)
Valve Control (Option) (MC) System Layout
Attachment Flow Rate Control
Auxiliary Flow Combiner Control
Breaker 1 (HSB Breaker) Control
Auxiliary Overload Relief Valve Pressure Control
Ride Control
Valve Control (Option) (PLCU)
Valve Control (Option) (PLCU) System Layout
Auxiliary and Positioning Control
Blade/Outrigger Control
Blade/Outrigger Control (Operation Control Circuit)
Assist Control
Abnormal Operation Judgment Control
Abnormal Center Signal Judgment Control
Electric Lever Pilot Cut Control
Other Control (MC)
Work Mode Control
Auto Shut-Down Control
Automatic Engine Stop Control at Low Temperature
Hydraulic Oil Overheat Alarm Control
Auto-Lubrication Control (Option)
Breaker Alarm Control (Option)
Travel Alarm Control (Option)
Swing Alarm Control (Option)
Overload Alarm Control (Option)
Other Control (PLCU)
Forward/Reverse Shifting Restriction Control
Travel Pilot Pressure Cut Control
Travel Mode Selection Control (Fast Speed)
Travel Mode Selection Control (Slow Speed)
Brake Dragging Prevention Control
Automatic Transmission Control
Parking Mode Control
Public Road Drive Mode Control
Engine System
Outline of ECM System
Fuel Injection Control
Fuel Injection Amount Control
Fuel Injection Timing Control
Fuel Injection Rate Control
Fuel Injection Pressure Control
Fuel Injection Amount Correction Control
EGR Control
Preheating Control
Variable Turbocharger Control
Alarm Control
Urea SCR System
DEF Injection Control
Start-Up Control
DEF Defrosting Control(DEF Tank)
DEF Defrosting Control (DEF Piping)
DEF Thermal Control(DEF Tank)
DEF Thermal Control (DEF Piping)
After-Run Control
Engine Output Restriction Control (INDUCEMENT)
Insufficient DEF Level
Malfunction of Urea SCR System/Malfunction of EGR System
Outline of Aftertreatment Device
Operation of Aftertreatment Device
Aftertreatment Device Regeneration Control
Hydraulic System
Outline of Hydraulic System
Pilot Circuit of Hydraulic System
Operation Control Circuit (Front Attachment, Swing, and Travel)
Operation Control Circuit (Auxiliary/Positioning, Blade/Outrigger, and Assist)
Pump Control Circuit (Refer to COMPONENT OPERATION/Pump Device.)
Aftertreatment Device Regeneration Control Circuit (Refer to SYSTEM/Control System.)
Valve Control Circuit (Refer to COMPONENT OPERATION/Control Valve, Travel Device.)
Axle Lock Release Circuit (Refer to COMPONENT OPERATION/Axle, Others (Undercarriage).)
Swing Parking Brake Release Circuit (Refer to COMPONENT OPERATION/Swing Device.)
Working Brake Circuit (Brake Valve)
Service Brake Circuit
Blade/Outrigger Control Circuit
Steering Circuit
Main Circuit of Hydraulic System
Neutral Circuit
Flow Combiner Circuit (Front Attachment)
Relief Circuit
Combined Operation Circuit
Arm 1 Flow Rate Control Circuit
Pump 2 Center Bypass Shut-Out Control Circuit
Bucket Regenerative Cut Circuit
Bucket Flow Rate Control Circuit
Arm Regenerative Circuit
Boom Lower Meter-In Cut Control
Boom Cylinder Bottom Pressure: High (With the Front Attachment above the Ground)
Boom Cylinder Bottom Pressure: Low (With Track Raised off the Ground)
Breaker/Pulverizer/Crusher Circuit (Option) of Hydraulic System
Auxiliary Flow Combiner Circuit
When Performing Single Operation of Auxiliary Flow Combiner Circuit
When Performing Combined Operation of Auxiliary Flow Combiner Circuit
Breaker 1 (HSB Breaker) Circuit
Breaker 2 (NPK Breaker) Circuit
Electrical System
Outline of Electrical System
Main Circuit of Electrical System
Electric Power Circuit (Key Switch: OFF)
CAN Circuit
Accessory Circuit (Key Switch: ACC)
Starting Circuit (Key Switch: START)
Charging Circuit (Key Switch: ON)
Alternator Operation
Regulator Operation
Surge Voltage Prevention Circuit
Pilot Shut-Off Circuit (Key Switch: ON)
Auto Shut-Down Circuit/Automatic Engine Stop Circuit at Low Temperature
Engine Stop Circuit
Emergency Stop Circuit
Monitor Circuit of Electrical System
Security Circuit
Aerial Angle Circuit
Control Lever Automatic Pilot Shut-Off Circuit
Seat Belt Reminder Circuit
Radio Circuit
Air Conditioner Circuit
Accessory Circuit of Electrical System
Work Light Circuit (Work Light Switch: 1 Position)
Work Light Circuit (Work Light Switch: 2 Position)
Wiper Circuit
Washer Circuit
Cab Light Circuit (Cab Light Switch: Door Interlocking Position (Key Switch: ON))
Cab Light Circuit (Cab Light Switch: ON Position)
Horn Circuit
Lighting Circuit of Electrical System
Light Lighting Circuit (Clearance Light, License Plate Light, Tail Light)
Light Lighting Circuit (Headlight)
Light Lighting Circuit (High Beam)
Light Lighting Circuit (Passing)
Turn Signal Light Circuit (Turn Signal Switch: Left-Turn Position)
Turn Signal Light Circuit (Turn Signal Switch: Right-Turn Position)
Hazard Light Circuit
Brake Light Circuit
Beacon Light Circuit (Option)
COMPONENT OPERATION
Pump Device
Outline of Pump Device
Outline of Main Pump
Operational Principle of Main Pump
Increasing and Decreasing of Main Pump Delivery Flow Rate
Outline of Regulator
Regulator Control Function
Control by Pump Control Pressure
Control by Own and Partner Pump Delivery Pressure (Regulators for Pump 1 and Pump 2)
Control by Pilot Pressure from Torque Control Solenoid Valves
Control by Pilot Pressure from Maximum Pump Flow Rate Limit Control Solenoid Valves (Pump Flow Rate Limit Control)
Control by Pilot Pressure from Maximum Pump Flow Rate Limit Control Solenoid Valves (Pump Flow Rate Control)
Flow Rate Increase Control by Pump Control Pressure
Flow Rate Decrease Control by Pump Control Pressure
Flow Rate Decrease Control by Own and Partner Pump Delivery Pressure (Regulators for Pump 1 and Pump 2)
Flow Rate Increase Control by Own and Partner Pump Delivery Pressure (Regulators for Pump 1 and Pump 2)
Flow Rate Decrease Control by Pilot Pressure from Torque Control Solenoid Valve
Flow Rate Control by Pilot Pressure from Maximum Pump Flow Rate Limit Control Solenoid Valves (Pump 1 and Pump 2)
Outline of Maximum Flow Rate Limit Control Solenoid Valve and Torque Control Solenoid Valve
Operation of Maximum Flow Rate Limit Control Solenoid Valve and Torque Control Solenoid Valve
Outline of Pilot Pump, Steering Pump and Assist Pump (Option)
Outline of Pump Delivery Pressure Sensor
Outline of Pump Control Pressure Sensor
Swing Device
Outline of Swing Device
Outline of Swing Reduction Gear
Outline of Swing Motor
Outline of Swing Parking Brake
When Brake is Released of Swing Parking Brake
When Brake is Applied of Swing Parking Brake
Outline of Valve Unit
Operation of Make-Up Valve
Outline of Swing Relief Valve
Low-Pressure Relief Operation (Shockless Function) of Swing Relief Valve
High-Pressure Relief Operation (Overload Prevention) of Swing Relief Valve
Outline of Swing Dampener Valve
Operation of Swing Dampener Valve
Output Curve of Swing Dampener Valve: Between A and B (When Relieving)
Output Curve of Swing Dampener Valve: Operation of Combination Valve A between A and B (During Relief)
Output Curve of Swing Dampener Valve: Operation of Combination Valve B between A and B (During Relief)
Output Curve of Swing Dampener Valve: Between B and C (Pressure Begins to Decrease)
Output Curve of Swing Dampener Valve: Operation of Combination Valve A between B and C (Pressure Begins to Decrease)
Output Curve of Swing Dampener Valve: Between C and D (Port BM Pressure Decreases)
Output Curve of Swing Dampener Valve: Operation of Combination Valve B between C and D (Port BM Pressure Decreases)
Output Curve of Swing Dampener Valve: Between D and E (During Aftershock)
Output Curve of Swing Dampener Valve: Operation of Combination Valve A between D and E (During Aftershock)
Output Curve of Swing Dampener Valve: Operation of Combination Valve B between D and E (During Aftershock)
Control Valve
Outline of Control Valve
Components in Control Valve
Main Circuit of Control Valve
Pilot Operation Control Circuit of Control Valve
External Pilot Pressure Circuit of Control Valve
Outline of Main Relief Valve
Relief Operation of Main Relief Valve
Pressure Increasing Operation of Main Relief Valve
Outline of Overload Relief Valve (With Make-Up Function)
Relief Operation of Overload Relief Valve
Make-Up Operation of Overload Relief Valve
Outline of Make-Up Valve
Make-up Operation of Make-Up Valve
Outline of Regenerative Valve
Operation of Boom Regenerative Valve
Operation When Performing Bucket Regenerative Operation
Operation When Performing Bucket Regenerative Cut Operation
Operation When Performing Arm Regenerative Operation
Operation When Releasing Arm Regenerative Operation
Outline of Anti-Drift Valve
Holding Operation of Anti-Drift Valve
Releasing Operation of Anti-Drift Valve
Outline of Flow Rate Control Valve
Normal Operation of Flow Rate Control Valve
Flow Rate Control Operation of Flow Rate Control Valve
Outline of Boom Lower Meter-In Cut Valve
Operation of Boom Lower Meter-In Cut Valve (With the Track off the Ground)
Operation of Boom Lower Meter-In Cut Valve (With the Front Attachment above the Ground)
Outline of Auxiliary Flow Combiner Valve and Pump 1 Bypass Shut-Out Valve
Operation of Auxiliary Flow Combiner Valve and Pump 1 Bypass Shut-Out Valve (During Single Operation)
Operation of Auxiliary Flow Combiner Valve and Pump 1 Bypass Shut-Out Valve (During Combined Operation)
Outline of Pump 2 Bypass Shut-Out Valve
Operation of Pump 2 Bypass Shut-Out Valve
Pilot Valve
Outline of Pilot Valve
Outline of Front Attachment/Swing Pilot Valve
Outline of Travel Pilot Valve
Operation of Front Attachment/Swing Pilot Valve
When Front Attachment/Swing Pilot Valve in Neutral (Output Curve: A to B)
During Metering or Decompressing of Front Attachment/Swing Pilot Valve (Output Curve: C to D)
Full Stroke of Front Attachment/Swing Pilot Valve (Output Curve: E to F)
Operation of Travel Pilot Valve
Neutral of Travel Pilot Valve (Output Curve: A to B)
During Metering or Decompressing of Travel Pilot Valve (Output Curve: C to D)
Electric Lever
Outline of Electric Lever
Operation of Auxiliary/Positioning Pedal (Electric Lever)
Operation of Blade/Outrigger Lever (Electric Lever)
Operation of AFL (Electric Lever)
Transmission
Outline of Transmission
Operation of Transmission
Operation of Transmission (Slow Speed Selection)
Operation of Transmission (Fast Speed Selection)
Operation of Transmission (Parking Brake)
Shift Interlock Control
Shockless Function of Transmission
Outline of Parking Brake Release Device
Operation of Parking Brake Release Device
Axle
Outline of Front Axle
Structure of Differential Gear
Purpose of Differential Gear
Basic Operational Principle of Differential Gear
Operation of Differential Gear
Outline of Reduction Gear
Brake Operation of Reduction Gear
Outline of Steering Cylinder
Outline of Rear Axle
Structure of Reduction Gear (Rear Axle)
Travel Motor
Outline of Travel Motor
Layout of Travel Motor
Rotor Section of Travel Motor
Outline of Regulator (Travel Motor)
Control Function of Regulator (Travel Motor)
Operation of Travel Motor (Slow Speed (Large Displacement Angle) Selection)
Operation of Travel Motor (Fast Speed (Small Displacement Angle) Selection)
Operation of Travel Motor (Slow Speed Selection (at Heavy Load))
Outline of Travel Relief Valve
Outline of Travel Brake Valve
Operation of Travel Brake Valve (When Traveling)
Operation of Travel Brake Valve (When Traveling on a Down Slope)
Signal Control Valve
Outline of Signal Control Valve
Pilot Valve Side of Pilot Port
Control Valve Side of Pilot Port
Outline of Shuttle Valve
Outline of Shockless Valve
Operation of Shockless Valve (During Boom Raise Operation)
Operation of Shockless Valve (During Boom Lower Operation or When Stopping Boom Raise Operation (Shock Reducing Operation))
Operation of Pump 1 Flow Rate Control Valve and Pump 2 Flow Rate Control Valve
Operation of Swing Parking Brake Release Spool
Operation of Bucket Flow Rate Control Valve Control Spool
Steering Valve
Outline of Steering Valve
Structure of Steering Valve
Operation of Steering Valve (Left Steering)
Operation of Steering Valve (When Steering Pump Is Stopped (When Engine Is Stopped))
Outline of Overload Relief Valve
Operation of Overload Relief Valve
Outline of Make-Up Valve
Operation of Make-Up Valve
Outline of Relief Valve
Operation of Relief Valve
Brake Valve
Outline of Brake Valve
Operation of Brake Valve (Brake Pedal is in Neutral) (Output Curve: A to B)
Operation of Brake Valve (Brake Pedal is in Step Position) (Output Curve: C to D)
Operation of Brake Valve (When the Working Brake is Applied)
Others (Upperstructure)
Outline of Pilot Shut-Off Solenoid Valve
Pilot Shut-Off Lever: LOCK Position
Pilot Shut-Off Lever: UNLOCK Position
Outline of Transmission Control Solenoid Valve
Operation of Transmission Control Solenoid Valve (Pressure Decrease)
Operation of Transmission Control Solenoid Valve (Fast Speed Selection)
Operation of Transmission Control Solenoid Valve (Slow Speed Selection)
Operation of Transmission Control Solenoid Valve (Parking Brake)
Outline of Solenoid Valve
Outline of 3-Spool Solenoid Valve Unit 1
Outline of 3-Spool Solenoid Valve Unit 2
Outline of Axle Lock/Brake Solenoid Valve Unit
Outline of Pump 1 and Pump 2 Flow Rate Control Solenoid Valve Unit
Outline of Cruise Control Solenoid Valve
Outline of Cruise Stop Solenoid Valve
Outline of 7-Spool Solenoid Valve Unit
Outline of 2-Spool Solenoid Valve Unit (For Assist) (Option)
Outline of 2-Spool Solenoid Valve Unit (For Blade/Outrigger Cylinder) (Option)
Outline of Auxiliary Control Solenoid Valve Unit (Option)
Outline of Proportional Solenoid Valve
Operation of Proportional Solenoid Valve (When in Neutral)
Operation of Proportional Solenoid Valve (When Excited)
Outline of ON/OFF Solenoid Valve
Operation of ON/OFF Solenoid Valve (when in Neutral)
Operation of ON/OFF Solenoid Valve (When in Operation)
Outline of Travel Shockless Valve
Operation of Travel Shockless Valve (Shockless Function)
Operation of Travel Shockless Valve (Travel Operation Limit Function)
Outline of Swing Shockless Valve
Operation of Swing Shockless Valve (Shockless Function)
Outline of Accumulator Charging Valve and Accumulator Manifold
Operation of Accumulator Charging Valve and Accumulator Manifold (Between Pressure Charging Start and Pressure Charging Finish)
Operation of Accumulator Charging Valve and Accumulator Manifold (After Pressure Charging Finish)
Outline of Hose Rupture Valve
Operation of Hose Rupture Valve (When Control Lever is in Neutral)
Operation of Hose Rupture Valve (During Boom Lower Operation (Control Lever Stroke: Less than Half-Stroke))
Operation of Hose Rupture Valve (During Boom Lower Operation (Control Lever Stroke: More than Half-Stroke))
Outline of Accumulator
Outline of Pilot Relief Valve Unit
Outline of Recirculation Valve
Outline of Selector Valve Control Valve (Option)
Outline of Selector Valve Control Solenoid Valve
Operation of Selector Valve Control Solenoid Valve (When in Neutral (Pulverizer or Crusher is Selected))
Operation of Selector Valve Control Solenoid Valve (When in Operation (Breaker is Selected))
Operation of Selector Valve (When in OFF (Pulverizer or Crusher is Selected))
Operation of Selector Valve (When in ON (Breaker is Selected))
Outline of Breaker Relief Solenoid Valve and Auxiliary Overload Relief Solenoid Valve
Relief Operation of Breaker Relief Solenoid Valve and Auxiliary Overload Relief Solenoid Valve
Others (Undercarriage)
Outline of Swing Bearing
Outline of Center Joint
Outline of Slip Ring
Outline of Axle Lock Cylinder and Blade/Outrigger Cylinder
Operation of Operate Check Valve (Axle Lock Cylinder) (When Axle Lock is Released)
Operation of Operate Check Valve (Axle Lock Cylinder) (When Operating the Axle Lock)
Operation of Operate Check Valve (Blade/Outrigger Cylinder)
SERVICE MANUAL REVISION REQUEST FORM
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