Hitachi EX135UR Excavator Operator's Manual (P/N EM1ED-EN2-2)

• Covers 1999 Hitachi EX135UR Excavators, serial numbers 002392 and up
• Details standard bucket, arm, and hydraulic system controls
• Official Hitachi construction machinery publication (P/N EM1ED-EN2-2)
• Contains 249 pages of system descriptions, operational layouts, and safety protocols
• Primary reference for early-production units, documenting initial control layouts and safety system integration
• Explores the Auto-MARCCINO mode, offset boom functions, work range restriction systems, HVAC climate controls, and jump-starting procedures
• Highlights track sag adjustments, fan belt tensioning, wiring diagrams, electrical circuit schematics, pilot oil filters, and fluid capacities

Operational Systems and Controls

Heavy equipment operators need to know exactly where every control is located. This PDF breaks down the operator's station comprehensively using monitor panel views and component location drawings, providing clear walkthroughs of the indicators—such as engine oil pressure, coolant temperature, and fuel levels. It also details integrated features like the auto-idle, economy mode, and bucket-cab collision prevention systems. Understanding these setups ensures you can adapt to different site conditions quickly. Always review the included safety alert symbols and signal words before operating near power lines or on steep slopes to prevent accidents and equipment damage.

Navigating daily routines requires accurate factory data. The guide outlines precise start-up procedures, travel techniques, and emergency exit methods. It clarifies the exact function of the pilot control shut-off lever, fuse box circuitry, and cabin climate controls. For workshop planning, the maintenance summaries and periodic replacement charts map out service intervals and hydraulic system inspections. To save on expensive dealer visits, the document provides step-by-step instructions for essential upkeep like track sag adjustments, fan belt tensioning, replacing pilot oil filters, and bleeding the fuel system. Handling hazardous fluids, proper storage protocols, transport, and towing are fully documented to keep operations running smoothly. Additionally, dedicated troubleshooting charts help isolate common faults rapidly.

System Identification and Technical Data

When executing a repair on this machine, exact factory parameters are essential to restore system tolerances. The documentation sets the engine break-in operation speed at 1000 RPM. Safe operating temperatures range from -20 to 40°C. If you are inspecting the hydraulic swing internal gear, the fluid capacity is listed strictly at 5 liters. Furthermore, the electrical system is rated to handle auxiliary loads up to 15 A. Direct access to these specifications, along with wiring diagrams and electrical circuit schematics, allows independent shops to bypass generic settings. Having these precise specifications directly at your workbench eliminates trial-and-error assembly, drastically reducing turnaround times and preventing improper fluid mixing.

Working on the EX135UR series requires specific attention due to its ultra-short radius design and offset boom. A common diagnostic trap involves the Auto-MARCCINO bucket-cab collision prevention system; technicians often overlook mud and debris packed around the proximity sensors, leading to erratic boom lockouts that are easily misdiagnosed as complex hydraulic valve failures. Additionally, ignoring the tight factory routing for pilot lines near the offset pivot can lead to severe hose chafing if not secured properly after maintenance.