Technical Manual Hitachi ZW50 Wheel Loader | T4ER-EN-00

Technical Manual Hitachi ZW50 Wheel Loader T4ER-EN-00 (Preview)

T4ER-EN-00
INTRODUCTION
SAFETY
SECTION AND GROUP CONTENTS
SECTION 1 GENERAL
GENERAL / Specification
SPECIFICATIONS
GENERAL / Component Specification
ENGINE
HST PUMP
GEAR PUMP
ORBITROLL
GENERAL / Component Layout
MAIN COMPONENT (OVERVIEW)
MAIN COMPONENT (POWER LINE)
HYDRAULIC SYSTEM (OVERVIEW)
ELECTRICAL SYSTEM (OVERVIEW)
ELECTRICAL SYSTEM (METER PANEL)
ENGINE
HST PUMP
REDUCTION
CONTROL VALVE
SECTION 2 SYSTEM
SYSTEM / Fuel System
OUTLINE
SYSTEM / Hydraulic System
OUTLINE
HST CIRCUIT
HST OIL FILTER
BRAKE CIRCUIT
PARKING BRAKE CIRCUIT
STEERING CIRCUIT
MAIN HYDRAULIC CIRCUIT
SYSTEM / Electrical System
OUTLINE
ELECTRICAL CIRCUIT (FRONT SIDE)
ELECTRICAL CIRCUIT (REAR SIDE)
ELECTRICAL CIRCUIT (COUPLER POSITION)
FUSE VALUE AND CIRCUIT MANE
ELECTRICAL POWER CIRCUIT
PREHEAT CIRCUIT (KEY SWITCH: HEAT)
PREHEAT CIRCUIT (KEY SWITCH: START TO ON)
CHARGING CIRCUIT
STARTING CIRCUIT
STOP CIRCUIT
MONITOR INDICATOR CIRCUIT
GAUGE CIRCUIT
TRAVEL CIRCUIT
TRAVEL CIRCUIT (FORWARD)
TRAVEL CIRCUIT (BACKWARD)
PARKING BRAKE CIRCUIT
LIGHT CIRCUIT
HORN CIRCUIT
AUTO LEVELER CIRCUIT
SECTION 3 COMPONENT OPERATION
COMPONENT OPERATION / HST Pump
HST CIRCUIT
HST PUMP
HIGH-PRESSURE RELIEF VALVE
HST PUMP CHARACTERISTIC CURVE
DA CONTROL
DISPLACEMENT ANGLE RETURN FORCE AND ADVANCE
INCHING VALVE
AUTOMATIC TRANSMISSION FUNCTION
TORQUE CONTROL FUNCTION
COMPONENT OPERATION / HST Motor
HST MOTOR
PILOT PRESSURE PROPORTIONAL CONTROL (HD CONTROL)
CONSTANT PRESSURE CONTROL
HD CONTROL
COMPONENT OPERATION / Axle
AXLE
DIFFERENTIAL ASSEMBLY
FINAL DRIVE ASSEMBLY
COMPONENT OPERATION / Brake
SERVICE BRAKE
PARKING BRAKE
TOWING MACHINE METHOD (IN EMERGENCY)
WET TYPE BRAKE ASSEMBLY IN REDUCTION GEAR
MASTER CYLINDER
COMPONENT OPERATION / Orbitroll
POWER STEERING (ORBITROLL)
OPERATION IN NEUTRAL
AT RIGHT SWING OPERATION
AT RELIEF VALVE OPERATION
COMPONENT OPERATION / Control Valve
CONTROL VALVE
OPERATION
OPERATION OF TILT SECTION
OPERATION OF LIFT SECTION
DETENT OPERATION
RELIEF VALVE
ANTI-VDID VALVE
COMPONENT OPERATION / Main Pump
MAIN PUMP
RETURN FILTER
SECTION 4 OPERATIONAL PERFORMANCE TEST
OPERATIONAL PERFORMANCE TEST / Introduction
OPERATIONAL PERFORMANCE TESTS
PREPARATION FOR PERFORMANCE TEST
OPERATIONAL PERFORMANCE TEST / Standard
PERFORMANCE STANDARD
OPERATIONAL PERFORMANCE TEST / Engine Test
ACT. ENG SPEED
ENGINE COMPRESSION PRESSURE
VALVE CLEARANCE
NOZZLE
OPERATIONAL PERFORMANCE TEST / Wheel Loader Test
TRAVEL SPEED
SERVICE BRAKE CONTROL FUNCTION
PARKING BRAKE CONTROL FUNCTION
HYDRAULIC CYLINDER CYCLE TIME
HYDRAULIC CYLINDER DRIFT CHECK
CONTROL LEVER OPERATING FORCE
CONTROL LEVER STROKE
MAIN RELIEF SET PRESSURE
STEERING RELIEF PRESSURE
DA CONTROL PRESSURE IN HST PUMP
LOW RELIEF PRESSURE IN HST PUMP
HIGH RELIEF PRESSURE IN HST PUMP
SECTION 5 TROUBLESHOOTING
TROUBLESHOOTING / Diagnosing Procedure
INTRODUCTION
DIAGNOSING PROCEDURE
TROUBLESHOOTING / Failure List
TROUBLESHOOTING / Engine
TROUBLESHOOTING / Vehicle Performance
SERVICE MANUAL REVISION REQUEST FORM