CASE D125C Hydraulic Schematic – Factory Hydraulic Circuit Diagram for Crawler Dozer

Technical Highlights

• Model: CASE D125C Crawler Dozer

• Document Type: Factory Hydraulic Schematic

• File Format: PDF

• Languages: English

• Part Number: RAC #47714313

• System Covered: Complete Hydraulic System – Track Drive, Implement, Fan, and Pilot Circuits

• Circuit Line Colors:
   • Red: Hydraulic Pressure
   • Orange: Charge Pump Pressure
   • Cyan: Return / Pump Inlet
   • Purple: Track Drive Circuit
   • Blue: Track Drive Case Drain
   • Green: Load Sense

Coverage

• System Overview
   • Simplified color-coded hydraulic circuit representation
   • Pressure, charge, return, and load-sense flow mapping
   • Hydraulic pressure ratings and flow data (420 bar, 150 L/min nominal)

• Main Hydraulic Subsystems
   • Track Drive Circuit – Dual pump and motor assemblies, brake release valves, flushing valves, and pilot control pistons
   • Implement Circuit – Lift, tilt, angle, and ripper cylinders with compensator valves and regeneration check systems
   • Charge and Pilot Circuits – Charge pump assembly, filters, bypass valves, and accumulator
   • Fan and Cooling Circuit – Integrated oil cooler, fan drive control, and temperature monitoring
   • Load Sense Circuit – Pressure feedback and dynamic flow control

• Component Reference List (1–67)
   Includes components such as:
   • Track Drive Motor Assemblies (Left/Right)
   • Pump Control Solenoid Valves
   • Charge Pressure Relief and Filters
   • Hydraulic Valves (Lift, Angle, Ripper, Equipment)
   • Flow Compensator and Load Sense Orifices
   • Pilot Accumulator and Regeneration Check Valves

• Hydraulic Specifications
   • System Pressure: 420 bar
   • Charge Pressure: 24 bar
   • Pilot Pressure: 16 bar
   • Implement Pressure: 238 ±6 bar
   • Load Sense Pressure: 207 ±3.5 bar

Delivery

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