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D155AX-5 Bulldozers – Hydraulic Fan Circuit | Soufyane HydroTech Soufyane HydroTech Training Catalog · JETT000200 D155AX-5 Bulldozers Hydraulic Fan Circuit Chapter 6 · Prepared by J. Ghesquiere · Komatsu 12 Pages Fan Pump · Fan Motor · EPC Valve ⚙️ Reversible Valve · Safety Valve 01 / 12 Cover – D155AX-5 Bulldozers 02 / 12 Fan Circuit – Overview 03 / 12 Fan Motor 04 / 12 Fan Pump – Function 05 / 12 Cooling Fan Pump No.1 – Servo Control 06 / 12 Cooling Fan Pump No.2 – Detailed Operation 07 / 12 Cooling Fan Pump No.3 – Pump Started 08 / 12 Cooling Fan Pump No.4 – Pump Stopped 09 / 12 Cooling Fan Pump No.5 – Reversible Valve OFF 10 / 12 Cooling Fan Pump No.6 – Reversible Valve ON 11 / 12 Cooling Fan Pump No.7 – Safety Valve 12 / 12 Fan Pump – Field Photo ...