Hitachi ZX 27U-3 30U-3 35U-3 Service Manuals

Factory Service Repair Manuals For Hitachi ZX 27U-3 30U-3 35U-3 Excavators. Tons of illustrations, instructions, diagrams for step by step remove and install, assembly and disassembly, service, inspection, repair, troubleshooting, tune-ups.

Format: PDF
Language: English
Searchable: Yes
Wiring Diagrams: Yes
Hydraulic Diagrams: Yes

Model

Hitachi ZX 27U-3, 30U-3, 35U-3

Contents

1.Electrical Circuit Diagrams
2.Hydraulic Circuit Diagrams
3.Technical Manual
4.Workshop Manual
INTRODUCTION
SAFETY
-GENERAL
–PRECAUTIONS FOR DISASSEMBLING AND ASSEMBLING
Precautions for Disassembling and Assembling
Maintenance Standard Terminology
–TIGHTENING
Tightening Torque Specifications
Torque Chart
Piping Joint
Periodic Replacement of Parts
–PAINTING
Painting
–BLEEDING AIR FROM HYDRAULIC OIL TANK
Bleed Air from Hydraulic Oil Tank
–FLOOR-TILTING DEVICE
Floor-Tilting Device Operation Procedure
Procedure for Floor Tilting up
Procedure for Floor Tilting down
-UPPERSTRUCTURE
–CANOPY AND CAB
Removal and Installation of 4-Pillar Canopy
Removal and Installation of Cab
Dimensions of Cab Glass
Removal and Installation of 2-Pillar Canopy
–COUNTERWEIGHT
Removal and Installation of Counterweight
–PUMP DEVICE
Removal and Installation of Pump Device
Disassembly of Pump Device
Assembly of Pump Device
Maintenance Standard
–CONTROL VALVE
Removal and Installation of Control Valve
Disassembly and Assembly of Control Valve
Disassembly and Assembly of Body
Disassembly of Boom Anti-Drift Valve (Only ZX30U-3, 35U-3)
Assembly of Boom Anti-Drift Valve (Only ZX30U-3, 35U-3)
Disassembly and Assembly of Spool
Disassembly and Assembly of Arm Regenerative Valve, Check Valve and Orifice
–SWING DEVICE
Removal and Installation of Swing Device
Disassembly of Swing Device
Assembly of Swing Device
Disassembly of Swing Motor
Assembly of Swing Motor
Maintenance Standard
–PILOT VALVE
Removal and Installation of Pilot Valve (Left)
Removal and Installation of Pilot Valve (Right)
Removal and Installation of Travel Pilot Valve
Removal and Installation of Blade Pilot Valve
Removal and Installation of Boom Swing Pilot Valve
Disassembly of Pilot Valves (Left and Right)
Assembly of Pilot Valves (Left and Right)
Disassembly of Travel Pilot Valve
Assembly of Travel Pilot Valve
Disassembly of Pilot Valves for
Boom Swing, Blade, and Auxiliary
Assembly of Pilot Valves for
Boom Swing, Blade, and Auxiliary
–SOLENOID VALVE
Removal and Installation of Solenoid Valve
Disassembly of 2-Spool Solenoid Valve
Assembly of 2-Spool Solenoid Valve
Disassembly of 1-Spool Solenoid Valve
Assembly of 1-Spool Solenoid Valve
-UNDERCARRIAGE
–SWING BEARING
Removal and Installation of Swing Bearing
–TRAVEL DEVICE
Removal and Installation of Travel Device
Disassembly of Travel Device
Assembly of Travel Device
Disassembly of Travel Motor
Assembly of Travel Motor
Disassembly and Assembly of Brake Valve
Maintenance Standard
–CENTER JOINT
Removal and Installation of Center Joint (ZX27U-3)
Disassembly of Center Joint (ZX27U-3)
Assembly of Center Joint (ZX27U-3)
Removal and Installation of Center Joint (ZX30U-3, 35U-3)
Disassembly of Center Joint (ZX30U-3, 35U-3)
Assembly of Center Joint (ZX30U-3, 35U-3)
–TRACK ADJUSTER
Removal and Installation of Track Adjuster
Disassembly of Track Adjuster
Assembly of Track Adjuster
–FRONT IDLER
Removal and Installation of Front Idler
Disassembly and Assembly of Front Idler
Maintenance Standard
–UPPER AND LOWER ROLLER
Removal and Installation of Upper Roller
Removal and Installation of Lower Roller
Disassembly and Assembly of Lower Roller
Maintenance Standard
–TRACK
Removal and Installation of Track
Maintenance Standard
-ATTACHMENT
–FRONT ATTACHMENT
Removal and Installation of Front Attachment
Maintenance Standard
Standard Dimensions for Arm and Bucket Connection
–CYLINDER
Removal and Installation of Cylinder
Disassembly of Boom Cylinder
Assembly of Boom Cylinder
Disassembly of Arm Cylinder
Assembly of Arm Cylinder
Disassembly of Bucket and Boom Swing Cylinders
Assembly of Bucket and Boom Swing Cylinders
Disassembly of Blade Cylinder
Assembly of Blade Cylinder
Maintenance Standard

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