Workshop Manual S3.8 Engine A030K288 (Issue 2) 01-2010 II. During Operation Trouble A) Engine fails. Cause 1. No fuel in tank Remedy Refill tank. After filling a tank which has been completely emptied. at first vent the fuel system. 2. Fuel filter is dirty 3. Leaking fuel pipe. 4. Fuel feed pump does not supply fuel. 5. Dirty or damaged injection nozzles Clean. Firmly tighten connections. Replace. Have the old pump checked at MICO dealer. Replace nozzles : have old nozzles checked or cleaned by MICO dealer. B) Engine suddenly starts knocking heavily Injection nozzle has got stuck. Remove load from the engine. Repeatedly shift from idling to full load for a short time.
If the knocking does not stop, have the entire fuel system cleaned as soon as possible. C) Some Cylinders fail to operate. One or more nozzles are not working. Injection pump does not function properly. Broken valve spring at intake or exhaust valve. Nozzles are damaged or the nozzle needle got stuck. 1. Fuel injection pump is not working properly. 2. Incorrect fuel injection timing. 3. Air filter is dirty. Fuel filter choked. Dismount and check nozzles at MICO dealer’s workshop. Get it checked a MICO Dealer’s workshop. Replace it. Check. if necessary, change and clean them. Have this repaired at MICO authorised service station only. D) Engine emits dense black smoke.
Check and reset the fuel timing. Clean. Replace fuel filter elements & clean fuel filter bowls. Slowly add cooling water only while the engine is running. E) Engine output decreases. 1. Lack of water in radiator. F) Engine overheating. Caution : Immediately put engine Back to idling position and stop it after some minutes ! 2. Leaking pipes. Retighten pipe connection, if necessary Replace gaskets. 3. Cooling system is dirty. 4. Thermostat is damaged. Clean Remove. Replace by new over as soon as possible. 5. Water pump is damaged. Have it repaired at CDSS Dealer’s workshop. 6. V-belt tension is not in order. 7.
Cylinder head gasket leaks (can be noticed by gas bubbles in the cooling water) Check Check gasket. When fastening cylinder head again pay attention to the tightening sequence. 40