ARIA

ENGINE 34 H. COOLANT REPLACEMENT 1. Allow the engine to cool up to ambient tempera- ture if it is hot. 2. Keep a suitable container below the radiator drain plug to collect the coolant that will drain . 3. Open the coolant tank cap (1). 4. Loosen the Drain plug till the coolant starts to drain from the drain tube and drain the coolant. NOTE The complete cooling system including oil cooler will be drained. 5. Pour fresh water through the coolant tank to en- sure all used coolant is flushed out of the system 6. Using dry compressed air (up to 1 bar) at the coolant tank, flush out the coolant completely. 7. Drain the Coolant tank and refit the hoses. COOLANT RE-FILLING PROCEDURE 1. Reconnect all the hoses and secure the hose clamps properly. 2. Refit the radiator drain plug. 3. Use a funnel for coolant filling. 4. Hold the funnel over coolant tank. Refill the cool- ant in the system through funnel. The filling rate should be 1.0 liter / min approx. 5. When coolant level comes up to coolant tank max level, wait and allow air bubbles to escape from the system for 5 to 10 min. Top up coolant once the level drops. 6. Start the engine and run in stationary condition at 2000 to 2200 rpm till thermostat opens and con- tinue to run for 5 mins. (The radiator fans coming on is indication of opening the thermostat) 7. Wait after stopping the engine to allow engine to come at atmospheric temp. Top up coolant in fill- er neck after stopping the engine. 8. Repeat the step 6 and 7 twice. 9. The coolant refilling is complete now. 10.Ensure that there are no leakages in the com- plete cooling system. NOTE It is recommended to refill the coolant in the engine through the vacuum evacuation system, if available.