Technical Manual Hitachi ZX30U-2, ZX35U-2 Excavator | KM-1M7-E

Technical Manual Hitachi ZX30U-2, ZX35U-2 Excavator KM-1M7-E (Preview)

INDEX(T)
INTRODUCTION
SAFETY
SAFETY SIGNS
CONTENTS
SECTION 1 GENERAL
Specifications
SPECIFICATIONS
WORKING RANGES
Component Layout
MAIN COMPONENT LAYOUT
ELECTRICAL COMPONENT LAYOUT (Over view)
ELECTRICAL SYSTEM (Controllers and Relays)
ELECTRICAL SYSTEM (Monitor and Switches)
ENGINE
SWING DEVICE
TRAVEL DEVICE
SWING DEVICE
2-UNIT SOLENOID VALVE
TORQUE CONTROL SOLENOID VALVE /
FLOW SELECTOR SOLENOID VALVE (OPTIONAL)
Component Specifications
ENGINE
ENGINE ACCESSORIES
HYDRAULIC COMPONENT
FILTER
ELECTRICAL COMPONENT
SECTION 2 SYSTEM
Control System
OUTLINE
ENGINE CONTROL
PUMP CONTROL
OTHER CONTROL
Hydraulic System
OUTLINE
PILOT CIRCUIT
MAIN CIRCUIT
Electrical System
OUTLINE
POWER CIRCUIT (KEY SWITCH: OFF)
POWER CIRCUIT (KEY SWITCH: ON)
PREHEATING CIRCUIT (KEY SWITCH:
HEAT)
STARTING CIRCUIT (KEY SWITCH: START POSITION)
CHARGING CIRCUIT (KEY SWITCH: ON)
ENGINE STOP CIRCUIT (KEY SWITCH: OFF)
SECTION 3 COMPONENT OPERATION
Pump Device
OUTLINE
MAIN PUMP (P1, P2)
MAIN PUMP (P3), PILOT PUMP (P4)
HORSE POWER CONTROL OPERATION
Swing Device
OUTLINE
SWING MOTOR
PARKING BRAKE
VALVE UNIT
SWING REDUCTION GEAR
Control Valve
OUTLINE
HYDRAULIC CIRCUIT
ARM REGENERATIVE VALVE
BOOM ANTI-DRIFT VALVE
FLOW COMBINER VALVE
FLOW COMBINING SELECTOR VALVE
MAIN RELIEF VALVE
OVERLOAD RELIEF VALVE
MAKE-UP VALVE
Pilot Valve
OUTLINE
OPERATION
SHOCKLESS FUNCTION (ONLY FOR TRAVEL PILOT VALVE)
SHUTTLE VALVE (ONLY FOR TRAVEL PILOT VALVE)
Travel Device
OUTLINE
TRAVEL MOTOR
PARKING BRAKE
TRAVEL BRAKE VALVE
TRAVEL REDUCTION GEAR
Others (Upperstructure)
2-UNIT SOLENOID VALVE
PILOT RELIEF VALVE
TORQUE CONTROL SOLENOID VALVE AND FLOW SELECTOR SOLENOID VALVE (OPTIONAL)
Others (Undercarriage)
SWING BEARING
CENTER JOINT
TRACK ADJUSTER
SECTION 4 OPERATIONAL PERFORMANCE TEST
Introduction
OPERATIONAL PERFORMANCE TEST
PREPARATION FOR PERFORMANCE TESTS
Standard
OPERATIONAL PERFORMANCE STANDARD
MAIN PUMP P-Q DIAGRAM
Engine Test
ENGINE SPEED
ENGINE COMPRESSION PRESSURE
VALVE CLEARANCE
NOZZLE CHECK
INJECTION TIMING
Excavator Test
TRAVEL SPEED
TRACK REVOLUTION SPEED
MISTRACK CHECK
TRAVEL MOTOR LEAKAGE
SWING SPEED
SWING FUNCTION DRIFT CHECK
SWING MOTOR LEAKAGE
MAXIMUM SWINGABLE SLANT ANGLE
SWING BEARING PLAY
HYDRAULIC CYLINDER CYCLE TIME
DIG FUNCTION DRIFT
CONTROL LEVER OPERATING FORCE
CONTROL LEVER STROKE
COMBINED BOOM RAISE/SWING FUNCTION
CHECK
Component Test
PRIMARY PILOT PRESSURE
SECONDARY PILOT PRESSURE
MAIN RELIEF VALVE SET PRESSURE
OVERLOAD RELIEF VALVE SET PRESSURE
PUMP DRIVING TORQUE
SWING MOTOR DRAINAGE
TRAVEL MOTOR DRAINAGE
Adjustment
Governor adjustment
SECTION 5 TROUBLESHOOTING
Diagnosing Procedure
INTRODUCTION
DIAGNOSING PROCEDURE
Troubleshooting A
TROUBLESHOOTING A PROCEDURE
ERROR INDICATION LIST
WIRE BREAKAGE AND SHORT CIRCUIT OF ENGINE CONTROL DIAL (System failure indicator: Flickering every 1 sec.)
MOTOR SENSOR BREAKAGE AND SHORT CIRCUIT (System failure indicator: Flickering every 0.5 sec.)
ABNORMAL MOTOR (System failure indicator: Lit)
Troubleshooting B
TROUBLESHOOTING B PROCEDURE (DIAGNOSIS OF MACHINE BY SYMPTOM)
ENGINE SYSTEM TROUBLESHOOTING
ACTUATOR OPERATING SYSTEM TROUBLESHOOTING
FRONT ATTACHMENT SYSTEM TROUBLESHOOTING
SWING SYSTEM TROUBLESHOOTING
TRAVEL SYSTEM TROUBLESHOOTING
BLADE SYSTEM TROUBLESHOOTING
BOOM SWING SYSTEM TROUBLESHOOTING
HOW TO LOWER BOOM WHEN ENGINE HOW TO LOWER BOOM WHEN ENGINE
HOW TO PREVENT HORN BLOWING AT
KEY SWITCH POSITION OF OFF
Troubleshooting C
TROUBLESHOOTING C PROCEDURE
(DIAGNOSIS OF MONITOR)
MALFUNCTION OF COOLANT TEPERATURE GAUGE
MULFUNCTION OF FUEL GAUGE
MALFUNCTION OF PREHEAT INDICATOR
MALFUNCTION OF ALTERNATOR INDICATOR
MALFUNCTION OF ENGINE OIL PRESSURE INDICATOR
MALFUNCTION OF OVERHEAT INDICATOR
MALFUNCTION OF FUEL LEVEL INDICATOR
MALFUNCTION OF MONITOR BUZZER
MALFUNCTION OF LIQUID CRYSTAL DISPLAY (LCD)
MALFUNCTION OF HOUR METER
MALFUNCTION OF AUTO-IDLE INDICATOR
Electrical System Inspection
PRECAUTIONS FOR INSPECTION AND
MAINTENANCE
FUSE CONTINUITY TEST
BATTERY VOLTAGE CHECK
VOLTAGE CHECK
CONTINUITY CHECK
SERVICE MANUAL REVISION REQUEST FORM
THE ATTACHED DIAGRAM LIST