Hitachi EX135UR Excavator 1997 Service Manual +++ 949 Pages +++ PDF Download

Technical Scope and Features

• Built for the 1997 Hitachi EX135UR Cab Mounted excavator, covering operational principles, system logic, and component operation diagnostics
• Official OEM technical manual, publication number KM-191E, Vol. No. TO191-00, released in 1997
• Includes 36 detailed electrical system diagrams and 24 hydraulic circuit schematics documenting flow and control paths
• Stored against your account so you can retrieve it after a hard-drive loss
• Full-text search finds any part number in seconds
• Documents the 4BG1T Isuzu engine performance data and electrical sensor reference values
• This 949-page document is the primary reference for the 1997 EX135UR build, providing the foundational logic for the electronic control and auto-MARCCINO systems

Operational Systems Documentation

This 1997 Hitachi EX135UR technical manual provides a detailed look at the core machine operating principles. The document covers the electronic control system, including engine management, Auto-Idle functionality, and Noise Reduction protocols. The hydraulics section documents the circuit logic for main pump operation, control valve spool mapping, and the integration of the blade circuit within the primary hydraulic system.

The manual further details the front attachment control logic, explaining how the auto-MARCCINO control unit manages movement restrictions, collision prevention for the cabin, and arm locus tracking. Every subsystem is described from a functional standpoint, detailing how sensor inputs influence output signals for pumps and solenoid valve units.

Specification Highlights

The technical data preview includes critical performance thresholds for the 62.5 kW Isuzu 4BG1T engine, such as 18.1 MPa injection pressure and valve clearances set at 0.4 mm. Hydraulic data covers the HPV050FW-RH18D main pump, detailing a theoretical maximum flow of 95 L/min per pump section. Pressure settings are documented extensively, such as main relief pressure at 34.3 MPa and overload relief settings up to 41.2 MPa for blade operation.

For identification, the unit overall width is documented as 2490 mm with an operating weight of 14000 kg. Reference only — always consult a certified technician before performing service on this equipment. This official 949-page Hitachi technical manual covers the 1997 EX135UR excavator, documenting operational principles for engine, hydraulic, electrical, and Auto-MARCCINO control systems to support accurate machine diagnostics and performance testing.