Technical Workshop Manual for Hitachi EX200-2 Series Excavator (1984–1992) – 177 Page Volume Detailed Edition

Hitachi EX200-2 / EX200LC-2 Technical Manual (KM10700)

• EX200-2 (1984–1992): 34.3 MPa (350 kgf/cm²) relief valve pressure architectures govern the primary hydraulic logic.
• EX200LC-2 (1984–1992): 24V electrical frameworks support the A-sensor and angle sensor calibration parameters.

Hydraulic power management logic defines the structural integrity of this archival data. Precision-mapped valve settings ensure consistent load-sensing behavior across all excavator boom and arm cycles.

Technical-Path navigation structures the repair sequence between the pilot oil circuit verification and the main pump displacement logic. Documentation structures the repair path through engine speed calibration, solenoid valve actuation frameworks, and control valve spool alignment. Information navigates through the swing motor brake logic, travel motor planetary gear assembly, and the comprehensive electrical wiring schematics required for E-mode and P-mode optimization.

Maintenance Workflow

• Hydraulic Pressure Testing: Utilize specific test ports to verify 3.9 MPa pilot pump output.
• Track Tension Calibration: Adjust grease cylinder expansion based on the 300–340 mm track sag logic.
• Engine Valve Clearance: Set 0.4 mm exhaust gap parameters during cold-cycle maintenance.
• Electrical Diagnostics: Monitor DP-sensor 2.5V output logic for load-sensing accuracy.

Technical Data Index

Technical Success Integrity

Operational safeguards depend on the systematic verification of the 2100 min⁻¹ rated engine speed framework. Consistent monitoring of the A-sensor voltage logic prevents hydraulic cavitation during high-load trenching cycles. Maintenance success requires strict adherence to the 200-liter hydraulic tank refill parameters using R46 series fluids.

FAQ

Q: What are the primary relief valve pressure settings for the Hitachi EX200-2 hydraulic logic? A: 34.3 MPa (350 kgf/cm²) is the standard relief valve pressure setting required to maintain maximum digging force within the main pump framework. This calibration parameter ensures that the hydraulic architectures operate at peak efficiency without exceeding the structural design limits of the boom and arm cylinders.

Q: Which service tools are required to verify the EX200LC-2 pilot circuit logic as per the 1984–1992 documentation supplements? A: 4903348 diagnostic harness or an equivalent digital multi-meter logic is essential for monitoring the DP-sensor voltage output, which should fluctuate around 2.5V during standard load-sensing operation. The late-stage supplements found in the 177-page manual confirm that these forensic tool-IDs are mandatory for troubleshooting the solenoid valve actuation framework.

Q: Is this technical archive for the Hitachi EX200 series provided in a searchable digital framework? A: High-definition searchable PDF logic allows for instantaneous navigation through all 177 pages, ensuring that technical parameters like the 8 Nm water pump housing torque are located in seconds. This digital download access eliminates the downtime associated with physical documentation, providing immediate workshop support.

Q: What are the specific hydraulic fluid refill parameters for a complete EX200-2 system maintenance cycle? A: 200 liters (53 US gal) of R46 series hydraulic fluid defines the total refill requirement for the tank and main circuit framework. Adhering to these specific lubricant architectures prevents pump cavitation and ensures the long-term integrity of the swing and travel motor assemblies.