Technical Manual Hitachi ZX690LCH-7, ZX690LCR-7 Hydraulic Excavator | TOJBQ40-EN-00

Technical Manual Hitachi ZX690LCH-7, ZX690LCR-7 Hydraulic Excavator TOJBQ40-EN-00 (Preview)

ZX690-7 Operational Principle1
TOJBQ40-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 ZX690LCH-7, 690LCR-7
Working Ranges ZX690LCH-7, 690LCR-7
Component Layout
Main Component (Upperstructure)
Main Component (Undercarriage)
Main Component (Front Attachment)
Electrical System (Overview)
Electrical System (Rear Tray)
Electrical System (Switches)
Electrical System (Utility Space)
Electrical System (Around Battery)
Engine Oil Monitoring Sensor and Engine Oil Filter
Hydraulic Oil Monitoring Sensor
Engine
Aftertreatment Device
Pump Device
Control Valve
Signal Control Valve
Pilot Check Valve
Swing Device
Travel Device
4-Spool Solenoid Valve Unit (Control Valve Side)
4-Spool Solenoid Valve Unit (Hydraulic Oil Tank Side)
Expansion Tank
Air Cleaner
DEF Tank
DEF Supply Module
Coolant Control Valve
Electric Fuel Pump and Fuel Filter
Radiator Fan Valve and Radiator Fan Motor
Oil Cooler Fan Valve and Oil Cooler Fan Motor
Shockless Valve
Radiator Fan Valve
Oil Cooler Fan Valve
Boom Upper Area
Arm Upper Area
Distribution Valve (Upperstructure)
Auto-Lubrication Device
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/HP Mode) Switch Control
ECO/PWR Mode Travel Speed Increase Control
Auto-Idle Control
Radiator Coolant Temperature Auto-Warming Up Control
Engine Speed Slow Down Control
One-Touch Idle Control (Option)
Pump Control
Pump Control System Layout
Pump Flow Rate Control
Engine Control Dial Output Control
Speed Sensing Control
Output Power Control
ECO/PWR Mode Control
Relief Flow Rate Decrease Control
Swing High Pressure Power Decrease Control
Overheat Prevention Control
Attachment Operation Pump Control (Option)
Radiator Fan Pump Flow Rate Control (Air Conditioner Switch: OFF)
Radiator Fan Pump Flow Rate Control (Air Conditioner Switch: ON)
Pump and Valve Learning Control
Pump Torque Restriction Control
Valve Control (Standard)
Valve Control (Standard) System Layout
Pressure Rising Selection Control When Traveling
Power Digging Control
Auto-Power Lift Control
Travel Motor Displacement Angle Control
Boom Mode Selector Control
Swing Flow Rate Control
Arm 2 Flow Rate Control
Bucket Flow Combiner Control
Aftertreatment Device Manual Regeneration Control
Aftertreatment Device Auto Regeneration Control
Engine Protection Control at Low Temperature
Oil Cooler Fan Rotation Control
Radiator Fan and Oil Cooler Fan Reverse Rotation Control
Arm Regenerative Cut Control
Other Control
Auto Shut-Down Control
Hydraulic Oil Overheat Alarm Control
Engine Oil, Coolant Level Check Control
Auto-Lubrication Control (Option)
Breaker Alarm Control (Option)
Overload Alarm Control (Option)
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 Thermal Control
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
Pump Control Circuit (Refer to COMPONENT OPERATION/Pump Device.)
Aftertreatment Device Regeneration Control Circuit (Refer to SYSTEM/Control System.)
Bucket Flow Combiner Circuit (Refer to SYSTEM/Control System.)
Valve Control Circuit (Refer to COMPONENT OPERATION/Control Valve.)
Travel Motor Displacement Angle Control Circuit (Refer to COMPONENT OPERATION/Travel Device.)
Swing Parking Brake Release Circuit (Refer to COMPONENT OPERATION/Swing Device.)
Emergency Boom Lower Circuit (Refer to COMPONENT OPERATION/Others (Upperstructure).)
Main Circuit of Hydraulic System
Neutral Circuit
Flow Combiner Circuit
Relief Circuit
Combined Operation Circuit
Flow Combiner Circuit
Swing Flow Rate Control Circuit
Arm Regenerative Cut Circuit
Arm 1 Flow Rate Control Circuit
Arm 2 Flow Rate Control Circuit
Bucket Regenerative Cut 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)
Radiator and Oil Cooler Fan Reverse Rotation Control 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
Work Light Circuit (Work Light: ON)
Work Light Circuit (Work Light, Work Light (Cab Upper), and Boom Light: ON)
Wiper Circuit
Washer Circuit
Cab Light Circuit (Cab Light Switch: Door Interlocking Position (Key Switch: ON))
Cab Light Circuit (Cab Light Switch: ON Position)
ZX690-7 Operational Principle2
TOJBQ40-EN-00
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 (For Main Pump)
Control by Pump Control Solenoid Valve (Minimum Flow Rate)
Control by Pump Control Solenoid Valve (Increase of Flow Rate)
Control by Pump Control Solenoid Valve (Decrease of Flow Rate)
Outline of Pump Control Solenoid Valve
Operation of Pump Control Solenoid Valve (When in Neutral)
Operation of Pump Control Solenoid Valve (When Excited)
Outline of Radiator Fan Pump
Operational Principle of Radiator Fan Pump
Increasing and Decreasing of Radiator Fan Pump Delivery Flow Rate
Outline of Regulator (For Radiator Fan Pump)
Control by Fan Pump Control Solenoid Valve (Minimum Flow Rate)
Control by Fan Pump Control Solenoid Valve (Increase of Flow Rate)
Control by Fan Pump Control Solenoid Valve (Decrease of Flow Rate)
Outline of Fan Pump Control Solenoid Valve
Operation of Fan Pump Control Solenoid Valve (When in Neutral)
Operation of Fan Pump Control Solenoid Valve (When Excited)
Outline of Pilot Pump and Oil Cooler Fan Pump
Outline of Pump Delivery Pressure Sensor
Outline of Pump Displacement 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
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
Operation of Flow Combiner 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 Boom Overload Relief Valve (Low Pressure)
Relief Operation of Boom Overload Relief Valve (Low Pressure)
Make-Up Operation of Boom Overload Relief Valve (Low Pressure)
Outline of Regenerative Valve
Operation of Boom Regenerative Valve
Outline of Bucket Regenerative Valve
Operation When Performing Bucket Regenerative Operation
Operation When Performing Bucket Regenerative Cut Operation
Operation When Performing Arm Regenerative Operation
Operation When Performing Arm Regenerative Cut 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)
Operation of Auxiliary Flow Combiner Valve (Auxiliary Flow Combiner Valve: OFF)
Operation of Auxiliary Flow Combiner Valve (Auxiliary Flow Combiner Valve: ON)
Outline of Pump 1 Bypass Shut-Out Valve and Pump 2 Bypass Shut-Out Valve
Operation of Pump 1 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
Outline of Auxiliary Pilot Valve
Operation of Front Attachment/Swing and Travel Pilot Valves
When Front Attachment/Swing and Travel Pilot Valves are in Neutral (Output Curve: A to B)
During Metering or Decompressing of Front Attachment/Swing and Travel Pilot Valves (Output Curve: C to D)
Full Stroke of Front Attachment/Swing and Travel Pilot Valves (Output Curve: E to F)
Operation of Auxiliary Pilot Valve
When Auxiliary Pilot Valve are in Neutral (Output Curve: A to B)
During Metering or Decompressing of Auxiliary Pilot Valve (Output Curve: C to D)
Outline of Shockless Function (Only Travel Pilot Valve)
Operation of Shockless Function
Travel Device
Outline of Travel Device
Outline of Travel Reduction Gear
Outline of Travel Motor
Operation of Travel Motor
Outline of Parking Brake
Operation of Parking Brake (When Parking Brake is Released)
Operation of Parking Brake (When Parking Brake is Applied)
Outline of Travel Brake Valve
Operation of Counterbalance Valve (During Travel)
Operation of Counterbalance Valve (When Descending a Slope)
Outline of Travel Relief Valve
Operation of Travel Relief Valve (During Relief)
Operation of Travel Relief Valve (During Make-Up)
Outline of Travel Mode Control
Operation of Selecting Travel Mode (Slow Speed)
Operation of Selecting Travel Mode (Fast Speed)
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 Flow Combiner Valve Control Spool
Operation of Swing Parking Brake Release Spool
Operation of Arm Flow Rate Control Valve Control Spool
Others (Upperstructure)
Outline of Pilot Shut-Off Solenoid Valve
Pilot Shut-Off Lever: LOCK Position
Pilot Shut-Off Lever: UNLOCK Position
Outline of Solenoid Valve
Outline of 4-Spool Solenoid Valve Unit (Control Valve Side)
Outline of 4-Spool Solenoid Valve Unit (Hydraulic Oil Tank Side)
Outline of Proportional Solenoid Valve
Operation of Proportional Solenoid Valve (When in Neutral)
Operation of Proportional Solenoid Valve (When Excited)
Outline of Radiator Fan Motor
Outline of Radiator Fan Valve
Relief Operation of Radiator Fan Valve
Make-Up Operation of Radiator Fan Valve
Outline of Oil Cooler Fan Motor
Outline of Oil Cooler Fan Valve
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 Pilot Relief Valve
Outline of Recirculation Valve
Outline of Shockless Valve
Operation of Shockless Valve
Outline of Accumulator (Pilot Circuit)
Outline of Distribution Valve
Operation of Distribution Valve
Others (Undercarriage)
Outline of Swing Bearing
Outline of Center Joint
Outline of Track Adjuster
SERVICE MANUAL REVISION REQUEST FORM