Technical Manual Hitachi ZX27U, ZX30U, ZX35U Excavator | KM-1LAE

Technical Manual Hitachi ZX27U, ZX30U, ZX35U Excavator KM-1LAE (Preview)

COVER
INTRODUCTION
SAFETY
SECTION 1 GENERAL
Specifications
SPECIFICATIONS
WORKING RANGES
Component Layout
MAIN COMPONENTS
ELECTRICAL SYSTEM
RELAYS
MONITOR AND SWITCHES
SOLENOID VALVE UNIT
Component Specifications
ENGINE
ENGINE ACCESSORIES
HYDRAULIC COMPONENT
FILTER
ELECTRICAL COMPONENT
SECTION 2 SYSTEM
Hydraulic System
OUTLINE
PILOT CIRCUIT
MAIN CIRCUIT
Electrical System
OUTLINE
POWER CIRCUIT (KEY SWITCH OFF)
INDICATOR LIGHT CHECK CIRCUIT/ ACCESSORY CIRCUIT (KEY SWITCH : ON)
PREHEATING CIRCUIT (KEY SWITCH:ON)
STARTING CIRCUIT (KEY SWITCH : START POSITION)
CHARGING CIRCUIT (KEY SWITCH : ON)
ENGINE STOP CIRCUIT (KEY SWITCH OFF)
SECTION 3 COMPONEN OPERATION
Pump Device
OUTLINE
MAIN PUMP (P1, P2)
MAIN PUMP (P3), PILOT PUMP (P4) (ZAXIS30U, 35U)
PILOT PUMP (P4) (ZAXIS27U)
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
Travel Device
OUTLINE
TRAVEL MOTOR
PARKING BRAKE
TRAVEL BRAKE VALVE
TRAVEL REDUCTION GEAR
Others (Upperstructure)
SOLENOID VALVE UNIT
PILOT RELIEF VALVE
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
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
ENGINE SPEED CONTROL LEVER ADJUSTMENT
SECTION 5 TROUBLESHOOTING
Diagnosing Procedure
INTRODUCTION
DIAGNOSING PROCEDURE
Troubleshooting A
TROUBLESHOOTING A PROCEDURE (DIAGNOSIS OF MACHINE BY SYMPTOM)
ENGINE SYSTEM TROUBLESHOOTING
ACTUATOR OPERATING SYSTEM TROUBLESHOOTING
FRONT ATTATCHMENT SYSTEM TROUBLESHOOTING
SWING SYSTEM TROUBLESHOOTING
TRAVEL SYSTEM TROUBLESHOOTING
BLADE SYSTEM TROUBLESHOOTING
BOOM SWING SYSTEM TROUBLESHOOTING
HOW TO LOWER BOOM WHEN ENGINE STOPS
Troubleshooting B
TROUBLESHOOTING B PROCEDURE (DIAGNOSIS OF MONITOR)
MALFUNCTION OF COOLANT TEMPERATURE GAUGE
MULFUNCTION OF FUEL GAUGE
MALFUNCTION OF ALTERNATOR INDICATOR
MALFUNCTION OF ENGINE OIL PRESSURE INDICATOR
MALFUNCTION OF OVERHEAT INDICATOR
MALFUNCTION OF FUEL LEVEL INDICATOR
MALFUNCTION OF BUZZER
MALFUNCTION OF HOUR METER
Electrical System Inspection
PRECAUTIONS FOR INSPECTION AND MAINTENANCE
FUSE CONTINUITY TEST
BATTERY VOLTAGE CHECK
VOLTAGE CHECK
CONTINUITY CHECK
THE ATTACHED DIAGRAM LIST