Component identification SCR system The illustration provides an overview of SCR system components. 1. Evaporator or hydrolysis catalytic converter 2. Pressure line for reductant 8. Reductant pump and control unit 9. Coolant hose, return from tank and pump heating 3. Coolant hose for tank and pump heating 10. Exhaust gas temperature sensor 4. NOx sensor with control unit 1 11. SCR catalytic converter 5. Coolant valve 12. NOx sensor with control unit 6. Reductant return line 7. Reductant tank 1. DC16 084A/384A/085A/385A only. OPM 300 en-GB 21 © Scania CV AB 2015, Sweden 6 2 1 3 4 5 7 12 13 8 10 11 9 425 340