MBE 900 OPERATOR'S GUIDE Clean as follows: water—50 grams per liter) of a mildly alkaline cleaning agent, such as sodium carbonate. 2. Run the engine at moderate speed until the thermostat starts to open, at an operating temperature of approximately 80°C (176°F). Then run it for about five minutes longer. Shut down the engine and allow it to cool to approximately 50°C (112°F). 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.
Remove debris (dust, insects, etc.) from the fins of the radiator grille by blowing them through with compressed air or spraying them out with water. Work from the rear of the radiator (in the opposite direction of the normal cooling air flow). 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. 2. Drain the coolant when the engine is cold. For detailed procedures, see the vehicle/chassis maintenance manual.
For types of coolant, refer to “Coolant” in the “Service Products” section. 3. Drain all the cleaning solution. 3. If the HVAC unit is connected to the cooling system, open the regulating valves all the way. 4. Flush the cleaning solution from the cooling system. [a] Immediately after draining the cleaning solution, flush the system with clean water. Degreasing Degrease as follows: [b] Once the clean water has drained, fill the system again with clean water. 1. Fill the cooling system with a 5% solution (1.6 ounces per quart of All information subject to change without notice. (Rev. 04/08) 41 DDC-SVC-MAN-0055 04/08 Copyright © 2008 DETROIT DIESEL CORPORATION