Maintenance Engines with few hours of op- eration IMPORTANT! On engines with few hours of operation, mainte- nance must be carried out annually or every 5 years. Stand-by generator sets and the like that are not used regularly should be test run and checked in accordance with the manufacturer's instructions. The following maintenance items must be car- ried out once the engine has been warmed up to operating temperature. 1. Checking the oil level. 2. Checking the coolant level. 3. Checking the vacuum indicator. 4. Checking the fuel level. 5. Check for engine leaks. 00:23-03 en-GB 5 © Scania CV AB 2016, Sweden