CASE 1150M Hydraulic Schematic – Factory Hydraulic Circuit Diagram for Crawler Dozer

Technical Highlights

• Model: CASE 1150M Crawler Dozer

• Document Type: Factory Hydraulic Schematic

• File Format: PDF

• Languages: English

• Part Number: RAC #47714312

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

• Circuit Color Codes:
   • 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
   • Functional description of CASE 1150M hydraulic system
   • Simplified flow representation with pressure, charge, and return lines
   • Pump-to-actuator relationship chart

• Main Hydraulic Circuits
   • Track Drive Circuit – Dual pump system, motor drive control, and brake release valves
   • Implement Circuit – Lift, tilt, and angle control spools with regeneration check valves
   • Fan Drive Circuit – Reversible fan drive motor with pilot-operated speed control
   • Charge Circuit – Charge pump, filters, and pressure relief system
   • Load Sense Circuit – Pressure feedback and dynamic flow compensation

• Component Reference List
   Includes all 67 factory-labeled components, such as:
    • Drive motors and pump assemblies
    • Pressure relief and priority valves
    • Ripper and tilt cylinders
    • Fan motor and pilot valves
    • Pilot accumulator and charge pump

• Hydraulic Flow Directions & Legends
   • Color-coded circuit flow key
   • System pressure points and sensor locations
   • Return and pilot pathways

• Service Use
   • Diagnostic pressure test guide
   • Maintenance reference for hydraulic performance tuning
   • Circuit access notes for troubleshooting

Delivery

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