Hitachi EX550 EX550-3 Excavator Technical Manual – PDF Download

Description

Hitachi EX550 EX550-3 Excavator Technical Manual – Full Factory Service Reference

This Hitachi EX550 EX550-3 Excavator Technical Manual is the complete factory-published technical reference for the EX550 and EX550-3 family of Hitachi hydraulic excavators, issued as Volume T116E-00 under Service Manual number KM-116E. Every major system on these machines is documented in depth, from the CUMMINS NTA-855-C400 and CUMMINS N14C diesel engines through the hydraulic main pump and regulator assembly, the swing and travel devices, the multi-spool control valve block, the electrical and monitoring circuits, and the undercarriage. It covers the EX550, EX550LC, EX550-3, EX550LC-3, EX550H, EX550LCH, EX600H-3 and EX600LCH-3, giving technicians, fleet owners, and heavy-equipment workshops one authoritative document for specification lookups, component theory, diagnostic fault tracing, and repair reference.

File Details

• Manual Type: Technical Manual (Volume T116E-00, part of Service Manual KM-116E)
• Brand: Hitachi
• Equipment Type: Hydraulic Excavator
• Models Covered: EX550, EX550LC, EX550-3, EX550LC-3, EX550H, EX550LCH, EX600H-3, EX600LCH-3
• Engines Covered: CUMMINS NTA-855-C400, CUMMINS N14C
• Language: English
• Page Count: 357 pages
• File Format: PDF

Chapters Covered in the Hitachi EX550 EX550-3 Excavator Technical Manual

• Section 01 – Specifications
  • General Information: Foreword, Specifications, Working Range, Transporting Dimensions, Shoe Types and Applications
  • Fuels and Lubricants: Service Refill Capacities, Fuel, Greasing, Engine Oil, Gear Oil, Hydraulic System, Cooling System
  • Bucket Dimensions: Arm and Bucket Dimensions
  • Machine Numbers
  • Component Specifications: Engine, Engine Accessories, Hydraulic Devices, Filters, Electrical Equipment
• Section 02 – Systems
  • Outline and Tanks Construction and Function
  • Pump Device: Main Pump, Regulator, Pilot Pump, Pressure Sensor
  • Swing Device: Swing Motor, Brake Valve, Swing Parking Brake, Swing Reduction Gear
  • Control Valve: Construction and Function, Hydraulic Circuit, Flow Combiner Valve, Main Relief Valve, Pump Control Valve, Overload Relief Valve, Make-Up Valve, Holding Valve, Arm Regenerative Valve, Automatic Air Bleed Circuit
  • Pilot Valve: Outline and Operation
  • Others: Pilot Shut-Off Valve, Shockless Valve, Accumulator, Solenoid Valve
• Section 03 – Undercarriage
  • Travel Device: Travel Reduction Gear, Travel Motor, Travel Brake Valve, Travel Motor Swash Angle Selection, Parking Brake
  • Others: Swing Bearing, Center Joint, Track Adjuster
• Section 04 – Electrical System
  • Component Location: Relays, Monitor and Switch Panel
  • Main Circuit: Power, Engine Start, Charging, Surge Voltage Prevention, Accessory, Engine Stop
  • Control System: Engine Control, Pump Control, Pressure Control, Work Mode Control, Other Controls, Diagnosing Function
  • Monitor: Outline, Panel, Function, Check Procedure
  • Inspection and Maintenance: Fuse Continuity, Fusible Links, Connectors, A Sensor, EC Sensor, EC Motor, EC and PVC Fault Codes, Dr. EX Monitor Function
• Section 05 – Hydraulic System
  • General: Main Circuit, Pilot Circuit
  • Control System: Pump Control, Pressure Control, Work Mode Control, Other Controls
  • Circuit Operation: Neutral Circuit, Single Actuator Operation, Combined Operation

Taken as a whole, the document serves two distinct jobs. The first is reference: pinned specification tables for component weights, refill capacities, digging forces, working ranges, torque values, pressure settings, and adjustment limits that a shop needs on hand before any wrench turns. The second is understanding: detailed cutaway illustrations, exploded views and circuit diagrams paired with plain-spoken explanations of how each subsystem actually works, so a technician can reason through a fault instead of guessing and swapping parts. This makes the manual useful both as a bench reference during teardown and as a diagnostic tool when a machine is misbehaving in the field.

Systems Documented in Practical Detail

The hydraulic coverage is the backbone of this Hitachi EX550 technical manual. It walks through the main pump and regulator, the pilot pump, the pump control and pressure sensors, the swing motor with its brake valve and parking brake, the travel reduction gear and travel motor with swash angle selection, the load-sensing control valve with its flow combiner, main relief, pump control, overload relief, make-up, holding and arm regenerative valves, and the automatic air bleed circuit. Each is illustrated and explained so that pump control, speed sensing, power summation, swing power decrease, relief cut-off and bucket speed-up control can be understood at the circuit level rather than as a black box.

The electrical section covers the power, engine start, charging and accessory circuits, then moves to the control system that runs engine control, pump control, pressure control, work mode control, swing parking brake release and travel speed control. The monitor panel, indicator logic, coolant temperature and hydraulic oil temperature sensors, EC sensor, N sensor, P sensor, A sensor and DP sensor are all covered, along with the EC and PVC fault code tables and the Dr. EX monitor function used for live diagnostics. Power mode settings (P, E, L, I) and work modes including general purpose, trenching, grading and precision are also documented, giving the reader the full picture of how the machine decides what to do.

Who This Hitachi EX550 Technical Manual Is For

This manual is aimed at professional diesel and heavy-equipment technicians, field service engineers, independent excavator repair shops, and fleet maintenance managers who need factory-level documentation rather than generic aftermarket advice. It is equally valuable for owners of a single EX550 or EX550-3 who want to understand their machine’s systems before authorising a repair, and for training environments where students need accurate cross-sections and circuit diagrams to study from. Because the coverage spans the whole EX550 and EX600H-3 family, it also suits workshops that service more than one variant in the line.

Why the Correct Specifications and Procedures Matter on an EX550

These are large, high-pressure machines: hydraulic pressures reach into the hundreds of bar, travel and swing systems handle tonnes of moving mass, and the electrical system ties the engine, pump and monitor into a single control loop. Getting a relief pressure setting wrong, mis-timing a travel motor swash angle adjustment, or mis-reading a fault code can lead to short component life, poor fuel economy, unexpected motion, or an expensive failure. Having the factory specification at hand, together with the correct diagnostic path and adjustment procedure, is what separates a proper repair from an expensive experiment. The fault code tables, specification values and system descriptions in this document are precisely what makes that possible.

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Instant PDF Delivery – Print Anytime, Read on Any Device

Your download is available immediately after checkout as a single PDF file, with no shipping and no waiting for a physical book. You can read it on a laptop, tablet or phone in the workshop, and print any page you need for the bench – whether that is a component location diagram, a hydraulic schematic, a specification table or a fault code reference. Keep a copy on every service vehicle and the entire Hitachi EX550 and EX550-3 technical reference is always within reach. This is the practical, complete and factory-issued service documentation that keeps these excavators working the way they were designed to.