2.5 Coolant circuit Engine description 1. Coolant pump 2. Lubricating oil cooler 3. Coolant duct 4. Cylinder pipe /head cooling (number/arrange- ment of cylinders depends on series) 5. Compressor (optional) 6. Gear oil cooler (optional) 7. Auxiliary cooler (optional) 8. Temperature sensor 9. Thermostat 10.Compensation tank 11.Filler neck 12.Heat exchanger 13.Cab heating (optional) 6 7 8 10 11 12 9 2 x1 x2 T x1 x2 1 2 3 4 13 1 2 3 4 5 Example: Coolant diagram 13