DL06 Operation and Maintenance Engine oil viscosity – ambient temperature Ambient temperature 2.3.9. Oil filter & cooler z Oil filter is assembled to the oil cooler. Oil cooler is plane tube and is cooled by the cooling water. z Check for oil pressure and oil leaks, and repair or replace the oil filter if necessary. Oil filter z Change the oil filter cartridge and cartridge simultaneously at every replacement of engine oil. Oil cooler Oil filter and cartridge 26 Technical Information Printed in Nov. 2006 PS-MMA0418-E1A Printed