Hitachi ZX350LC-6 Excavator Technical Troubleshooting Manual – TTDDQ60-EN-00 PDF

Description

File Details

• Manual Type: Technical Manual – Troubleshooting
• Brand: Hitachi Construction Machinery
• Model: ZX350LC-6 Hydraulic Excavator
• Document Number: TTDDQ60-EN-00
• Date: 11/07/2024
• Language: English
• Format: PDF
• Pages: Approximately 588

Chapters Covered

This Hitachi ZX350LC-6 Technical Manual contains the complete troubleshooting and operational performance testing sections for the ZX350LC-6 hydraulic excavator. The manual is organized into two major sections:

• Section 4 – Operational Performance Test
  • Group 1: Introduction – test preparation, performance standards, evaluation methods
  • Group 2: Standard – engine, travel, swing, front attachment, lever, combined operation, and component system performance standards
  • Group 3: Engine Test – engine speed measurement and lubricant consumption
  • Group 4: Machine Performance Test – travel speed, track revolution speed, mistrack check, travel parking leakage, swing speed, swing drift, swing motor leakage, maximum swingable slant angle, swing bearing play, hydraulic cylinder cycle time, dig function drift checks, control lever operating force and stroke, combined operation checks
  • Group 5: Component Test – primary and secondary pilot pressure, 5-spool and 2-spool solenoid valve set pressure, main pump delivery pressure, main relief set pressure, overload relief valve set pressure, main pump flow rate measurement (P-Q control and pilot characteristics), regulator adjustment, swing motor drainage, travel motor drainage
  • Group 6: Adjustment – aftertreatment device serial number rewrite, fault code clearing, procedures after replacing DCU and ECM, air bleeding from DEF defrosting piping, manual regeneration switch check, remedies for DEF pressure decrease and abnormal DEF quality, DEF tank cleaning, remedy when mixing oil in DEF tank
• Section 5 – Troubleshooting
  • Group 1: Diagnosing Procedure – electrical system inspection, fuse inspection, fusible link inspection, battery voltage check, alternator check, continuity checks, voltage and current measurement of 24-volt and 5-volt circuits, false signal checks, test wire harness procedures
  • Group 2: Monitor – basic screen, service menu operation, troubleshooting screen display, monitoring items for ECM, MC, wiper/light controller, air conditioner unit, controller version, issued warning record, alarm list, communication terminal status, machine setting, constant change, attachment constant change, monitor setting, operation permission, maintenance items, engine setting, aftertreatment device number, maintenance mode, setting menu, breaker alarm, relief valve set-pressure adjustments, fluid level inspections, gauges
  • Group 3: e-Service – outline, operation data lists, communication system
  • Group 4: Component Layout – main component, front attachment, electrical system (overview, rear tray, switches, utility space, oil monitoring sensors, relays), engine, aftertreatment device (one and two NOx sensor configurations), pump device, around pump device, control valve, signal control valve, swing device, travel device, solenoid valve units, DEF tank, DEF supply module, attachment spec parts, pilot valves, selector valve control solenoid valve, auxiliary flow combiner control solenoid valve, boom areas, utility space, control valve internal components, pilot port layouts, main and pilot circuit port layouts, cab harness, engine harness, pump harness, NOx harness, monitor harness, GSM harness, key switch harness, pilot shut-off solenoid valve harness, rearview camera harness
  • Group 5: Troubleshooting A (Base Machine Diagnosis by Fault Codes) – MC fault codes (controller hardware, CAN data reception, engine failure, pump failure, pilot failure, proportional solenoid valve failure, other failures), electrical lever system fault codes, ECM fault codes, DCU fault codes, monitor controller fault codes, air conditioner controller fault codes, communication terminal fault codes, aerial angle controller fault codes, specific diagnostic procedures for individual fault codes, CAN harness checks
  • Group 6: Troubleshooting B (Machine Diagnosis by Trouble Symptom) – relationship between machine trouble symptoms and related parts, correlation between trouble symptoms and part failures, troubleshooting procedures for engine system (E-1 to E-9), all actuator system (A-1 to A-8), front attachment system (F-1 to F-16), swing system (S-1, S-2), travel system (T-1 to T-6), other systems (O-1 to O-5), exchange inspection method, emergency boom lowering procedures, attachment circuit pressure release
  • Group 7: Air Conditioner – outline, component layout, functions of main parts, fault code list, troubleshooting procedures, cooling and heating fault diagnosis, blower motor and compressor clutch testing, manifold gauge checks, component replacement procedures, refrigerant charging, warm-up operation, inspection, hose and pipe tightening torques

The Hitachi ZX350LC-6 Technical Manual (Troubleshooting) is a diagnostic and performance testing resource written for experienced technicians. It provides the operational performance standards, measurement procedures, and diagnostic fault code information needed to evaluate, diagnose, and repair the ZX350LC-6 hydraulic excavator. The manual covers the machine’s engine control system, hydraulic pump control, solenoid valve operations, pilot pressure circuits, and aftertreatment device management.

What This Manual Enables You To Do

With this Hitachi ZX350LC-6 troubleshooting manual, you can perform complete operational performance tests to verify the engine, travel, swing, and front attachment systems meet published standards. The manual provides step-by-step measurement procedures for engine speed, travel speed, track revolution, mistrack, swing speed and drift, hydraulic cylinder cycle times, control lever forces and strokes, combined operation checks, and dig function drift. Each test includes the required conditions, measurement method, evaluation criteria against performance standards, and reference to the remedy section if results fall outside acceptable ranges.

The fault code diagnosis sections let you read and interpret fault codes from the MC, ECM, DCU, monitor controller, air conditioner controller, communication terminal, and aerial angle controller. Each fault code entry identifies the trouble, cause, symptoms in machine operation, and the specific remedy. The manual explains how to use MPDr (Maintenance Pro Dr.) and the monitor service menu to monitor sensor inputs, solenoid valve outputs, pressure readings, and switch states, so you can pinpoint electrical and hydraulic faults without guesswork.

For hydraulic component testing, the manual details how to measure primary and secondary pilot pressures, main pump delivery pressure, main relief set pressure, overload relief set pressure, solenoid valve set pressures, and main pump flow rate using hydraulic testers and pressure gauges. It also covers swing motor and travel motor drainage measurement, regulator adjustments for pumps 1, 2, and 3, and the pressure adjustment procedures for main relief and overload relief valves.

The troubleshooting B section approaches diagnosis from the symptom side. It starts with a table correlating machine trouble symptoms to related parts, then provides structured inspection procedures for symptoms like starter does not rotate, engine does not start, all actuators do not work, actuator speeds are slow, specific front attachment operations are slow or weak, swing and travel problems, and work light, wiper, and washer failures. Each procedure lists the inspection method, condition, evaluation, and cause, with references to connector diagrams and component locations.

For machines equipped with the urea SCR aftertreatment system, the manual covers DEF/AdBlue pressure and quality remedies, DEF tank cleaning, air bleeding from the DEF defrosting piping, manual regeneration switch checks, and the procedures required after replacing the DCU and ECM. The air conditioner section provides fault code diagnosis, cooling and heating performance troubleshooting using manifold gauges, blower motor and compressor clutch circuit tests, and the complete refrigerant charging procedure with purging, warm-up, and leak inspection steps.

Why This Manual Matters

Correct diagnosis and repair of the ZX350LC-6 depends on having the right specifications and procedures. This manual gives you the actual performance standards, pressure values, flow rates, cycle times, and fault code definitions that Hitachi publishes for this excavator. Without these, you risk misdiagnosing a fault, replacing parts that are not faulty, or adjusting pressures and flows outside safe limits. The measurement procedures include the exact test conditions – engine speed, hydraulic oil temperature, work mode, power mode – so your readings are comparable to the standard values. The evaluation tables tell you what is normal and what is not, and the remedy sections direct you to the specific component or circuit that needs attention.

Delivery

IMAGES PREVIEW

This Hitachi ZX350LC-6 Excavator Technical Troubleshooting Manual is delivered as an instant PDF download after payment. No waiting for shipping, no physical media. You can access it on any device – laptop, tablet, or smartphone – and print the pages you need for the workshop. The PDF format lets you search for fault codes, specifications, or procedures quickly, so you spend less time flipping through pages and more time diagnosing and repairing the machine.