Hitachi ZX70-3 70LC-3 70LCN-3 75US-3 85US-3 Excavator Technical Manual Troubleshooting

Description

Hitachi ZX70-3 70LC-3 70LCN-3 75US-3 85US-3 Excavator Technical Manual Troubleshooting

File Details

• Manual Type: Technical Manual (Troubleshooting)
• Brand: Hitachi
• Models Covered: ZX70-3, ZX70LC-3, ZX70LCN-3, ZX75US-3, ZX85US-3
• Language: English
• File Format: PDF
• Page Count: 409 pages

Chapters Covered

The Hitachi ZX70-3, 70LC-3, 70LCN-3, 75US-3, 85US-3 Technical Manual Troubleshooting contains the following major sections and groups:

• Section 4 — Operational Performance Test
  • Group 1 Introduction
  • Group 2 Standard
  • Group 3 Engine Test
  • Group 4 Excavator Test
  • Group 5 Component Test
  • Group 6 Adjustment
• Section 5 — Troubleshooting
  • Group 1 Diagnosing Procedure
  • Group 2 Monitor Unit
  • Group 3 Dr. ZX
  • Group 4 ICF
  • Group 5 Component Layout
  • Group 6 Troubleshooting A
  • Group 7 Troubleshooting B
  • Group 8 Electrical System Inspection
• Technical Manual (Operational Principle)
  • Section 1 General
  • Section 3 Component Operation
• Workshop Manual
  • Section 1 General Information
  • Section 2 Upperstructure
  • Section 3 Undercarriage
  • Section 4 Front Attachment

Operational Performance Testing

The Hitachi ZX70-3, ZX75US-3 and ZX85US-3 operational performance test section gives you the standard values and step-by-step procedures needed to evaluate engine speed, engine compression pressure, valve clearance, nozzle injection pressure and injection timing. You get the complete operational performance standard table covering slow idle, fast idle, ECO-deactivated fast idle, relief-operation speeds, E-mode fast idle and auto-idle speed for each covered model.

Excavator test procedures include travel speed, track revolution speed, mistrack check, travel parking leakage, swing speed, swing function drift, swing motor leakage, maximum swingable slant angle, swing bearing play, hydraulic cylinder cycle time, dig function drift, control lever operating force, control lever stroke and combined boom-raise/swing function checks. Each test lists the required switch positions, hydraulic oil temperature, bucket condition and measurement method.

Component testing covers primary pilot pressure, secondary pilot pressure, solenoid valve set pressure, main pump delivery pressure, main relief valve set pressure, overload relief valve set pressure, main pump 1 and 2 flow rate, main pump 3 flow rate, swing motor drainage and travel motor drainage. The manual includes P-Q diagrams for main pumps 1 and 2 (ZX70-3 and ZX75US-3) and main pump 3, plus sensor activating ranges and adjustment procedures for the main relief valve, swing relief valve, travel relief valve and overload relief valves.

Diagnostics and Troubleshooting

Troubleshooting A in this Hitachi excavator technical manual lets you diagnose the base machine using fault codes from the MC, ECF, ICF and monitor unit. It contains the MC fault code list, ECF fault code list, ICF fault code list, satellite terminal fault code list and monitor unit fault code list. Each fault code entry shows the trouble, the cause, the influenced control, the symptoms in machine operation when the trouble occurs and the remedy by Dr. ZX.

Detailed flow charts walk through MC fault codes 11000 through 11004, 11100, 11101, 11304, 11307, 11401, 11405, 11901, 11910 to 11920, ICF fault codes 14000 to 14003 and 14006/14008, satellite terminal fault codes 14100 to 14106, and monitor unit fault codes 13303, 13304, 13306, 13308, 13310 and 13311. The CAN harness check section includes continuity checks between MC and ECF, MC and ICF, and MC and the monitor unit, plus discontinuity checks between the CAN circuit and ground circuit, power circuit and key signal circuit.

Troubleshooting B handles base machine diagnosis starting with inspection of abnormal operational status when no fault code is displayed. It opens with tables showing the relationship between machine trouble symptoms and related parts, and the correlation between trouble symptoms and part failures. Engine system troubleshooting covers starter does not rotate, engine does not start, engine stalls when the control dial is fully rotated, engine speed remains unchanged, engine does not stop with the key switch OFF, auto-idle faults, E-mode faults, engine stall during operation, difficult starting at low temperature and engine overheating. All actuator, front attachment, swing, travel, blade and other system troubleshooting procedures are included, along with an emergency boom lowering procedure.

Monitor Unit, Dr. ZX and ICF

The monitor unit section of this Hitachi ZX70-3, ZX70LC-3, ZX70LCN-3, ZX75US-3 and ZX85US-3 manual explains how to use the screens, including the primary screen, password input screen, maintenance settings, back monitor settings, language settings, monitoring screen and the built-in diagnosing system service menu. You get the alarm display contents, time setting, maintenance setting, mail function (optional), password change and keyless hour meter.

Dr. ZX coverage includes the MC monitoring list, ECF monitoring list, monitor unit monitoring list, MC setup, parameter change item list, all parameter initialize, ICF setup, Dr. ZX operation procedure and ZX-3 7t function setting. The ICF section provides the list of daily report data, list of frequency distribution data, list of total operating hours, download and upload procedures, various ICF and satellite communication terminal setups by using Dr. ZX, list of fault codes and an explanation of the satellite communication system.

Component Layout, Workshop Manual and Electrical System Inspection

The component layout section provides illustrated main component layouts for ZX70-3 and for ZX75US-3 and ZX85US-3, electrical system overviews, electrical system monitor and switch layouts, controllers and relays, engine components, pump device electrical system, battery, control valve, pump device, swing device, travel device and components inside the control valve.

The workshop manual portion of this Hitachi excavator technical manual troubleshooting PDF covers general information including precautions for disassembly and assembling, tightening torque, painting and bleeding air from the hydraulic oil tank. Upperstructure coverage includes cab, counterweight, main frame, pump device, control valve, swing device, pilot valve, pilot shut-off solenoid valve, shockless valve, solenoid valve unit, engine and undercarriage. Undercarriage sections cover swing bearing, travel device, center joint, track adjuster, front idler, upper and lower roller and track. Front attachment coverage includes the front attachment assembly and cylinder.

Electrical system inspection gives you precautions for inspection and maintenance, instructions for disconnecting connectors, fuse inspection, fusible link inspection, battery voltage check, how to check the alternator, continuity check, voltage and current measurement, check by false signal and the available test harnesses. The fuse table lists each fuse number, capacity and connected circuit for both the ZX70-3/70LC-3/70LCN-3 and ZX75US-3/85US-3 configurations.

Get Your Hitachi Excavator Back to Work

Whether you are troubleshooting a fault code on a ZX70-3, performing a complete operational performance test on a ZX75US-3 or overhauling the hydraulic system on a ZX85US-3, this Hitachi Technical Manual Troubleshooting gives you the standard values, diagnostic flow charts and repair procedures needed to get the job done correctly. Instead of guessing at pressures, cycle times or fault code meanings, you can follow the same diagnostic logic and specifications used by professional technicians.

This 409-page PDF is delivered instantly after payment, with no shipping and no waiting. You can view it on any device, print the pages you need for the workshop and keep it on hand for every service and repair job on your Hitachi ZX70-3, ZX70LC-3, ZX70LCN-3, ZX75US-3 or ZX85US-3 excavator.

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