F2B ENGINE 111 T RAKKER E URO 4/5 VIEWS OF RADIATOR THERMOSTAT OPERATION FOR GEARBOX WITH INTARDER Figure 221 61905 61906 SYSTEM WITH THERMOSTAT OFF SYSTEM WITH THERMOSTAT ON A. Gearbox heat exchanger - B. Engine - C. Thermostat closed - D. Thermostat open - 1. Inlet from radiator - 2. Return from cabin heater - 3. Inlet from header tank - 4. Delivery to cabin heater - 5. To engine water pump - 6. Outlet from the head - 7. Delivery to gearbox heat exchanger - 8. Return from heat exchanger to thermostat - 9. Engine re-circulation (breather) to header tank - 10. Delivery to radiator. Print 603.93.641 Base q November 2006