This CASE Grader Front Wheel Drive Functional Scheme FG200 PDF provides the complete electrical and hydraulic layout of the AWD/FWD system used in CASE Series B motor graders.
The document details signal inputs, outputs, and communication protocols between TCU (Transmission Control Unit), ECM (Engine Control Module), and Linde HPV55-02 / HMV75-02 hydraulic components.
Technical Highlights
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System type: FG200 Front Wheel Drive (AWD configuration)
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Date: 14 July 2009
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Primary modules:
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TCU / ECM (EDC)
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AWD control switchpad
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Hydraulic pump (HPV 55-02)
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Hydraulic motors (HMV 75-02 Left / Right)
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Control logic shown:
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Motor Displacement Calculation (Task E 50 ms)
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Pump Displacement Calculation (Task G 50 ms)
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Motor Control (Task A 10 ms)
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Pump Control (Task B 10 ms)
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CAN Bus Data Exchange (Tasks C, I 100 ms)
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Inputs covered:
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Accelerator, inching, brake pedals
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Forward/neutral/reverse switches
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AWD / Creep / Drive Behavior selector
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Pressure sensors (u16PresFw, u16PresRv)
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Outputs:
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Solenoid valve control (PWM signals)
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Proportional displacement valves
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Pressure dump and high-pressure cut-off
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Operating range:
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Max pump displacement ±55 cc
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Max motor torque 10 645 Nm @ 167 rpm
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System pressure 420 bar (6091 psi) continuous / 500 bar peak
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Communication:
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CAN J1939 @ 10 ms & 100 ms update rates
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ECM–TCU integration with drive behavior logic
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Diagram features (page 1):
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Inputs/Outputs legend (yellow/green blocks)
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Hydraulic flow paths with charge pump, pilot valve, and main circuit
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Cooling system sizing notes for max ambient temperature and heat dissipation
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File Information
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Publisher: Neubert Engineering
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System: CASE Series B Grader FWD / AWD Hydraulic System FG200
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Pages: 1 (Full schematic)
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Language: English / Technical Symbols (IEC standard)
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Format: Vector PDF
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Category: Hydraulic and Electronic System Diagram
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