MBE 900 ENGINE 2007 OPERATOR'S GUIDE 4. Start radiator flushing by attaching a flushing gun nozzle to the radiator outlet and run water in until the radiator is full. HOT COOLANT To avoid scalding from the expulsion of hot coolant, never remove the cooling system pressure cap while the engine is at operating temperature. Wear adequate protective clothing (face shield, rubber gloves, apron, and boots). Remove the cap slowly to relieve pressure. EYE INJURY To avoid injury from flying debris when using compressed air, wear adequate eye protection (face shield or safety goggles) and do not exceed 276 kPa (40 psi) air pressure. 1.
Open the cap on the surge tank slowly, to allow excess pressure to escape. Set the cap aside. 2. Open the water regulating valve for the heating system. 5. Apply no more than 140 kPa (20 psi) air pressure intermittently to help dislodge sediment buildup in the core. 3. Place a large receptacle underneath the coolant drain plug and open the coolant drain plug on the bottom of the radiator. 6. Drain the radiator, and flush the radiator until clean water flows from the radiator. Remove the flushing gun. NOTE: Make sure the coolant can flow unobstructed into the receptacle. 7. When the coolant has drained, install the coolant drain plug on the radiator. 8.
Add coolant in the specified concentration until the maximum mark on the surge tank is reached. NOTICE: Do not apply more than 140 kPa (20 psi) air pressure for a radiator flush; more pressure could damage the radiator or heater core. 9. Start the engine and run it for about one minute at varying speeds to release air pockets in the cooling system. Ensure the heater valve is still open. Check All information subject to change without notice. (Rev. 04/08) 117 DDC-SVC-MAN-0040 0704 Copyright © 2008 DETROIT DIESEL CORPORATION