Routine Preventive Maintenance WARNING: 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. NOTE: It may be necessary to clean the exterior of the radiator more frequently if the engine is being operated in extremely dusty or dirty areas. 2. If necessary, clean the exterior using a quality grease solvent, such as mineral spirits, and dry with compressed air. Do not use fuel oil, kerosene, or gasoline. 3.
If the low coolant level sensor is installed in the top tank of the radiator, test for proper operation every 100,000 miles (160,000 km) or 12 months, whichever comes first. Authorized Detroit™ distributors are properly equipped to perform this service. Monitoring the Fuel Filters Monitoring the Two-Filter Fuel System Filters NOTICE: Fuel filter elements will turn black over time. This is normal for DD5/DD8 only. Do not replace filters solely because of this condition. Replace filters between normal service intervals only if required by troubleshooting.
The engine is equipped with a prefilter that filters down to 100 microns, a coalescer/final filter that separates water (DD8 only, the DD5 is not equipped with a water coalescing filter), and filters down to two microns.. When servicing these elements, both filters should be changed at the same time. Both elements are located within the fuel filter module located on the left side of the engine. NOTE: Filter change intervals may be shortened to conform with established preventive maintenance schedules, but should never be extended. 1. Replace the fuel filters using the Preventative Maintenance Tables. Adjusting the Valve Lash NOTE:
Proper valve lash clearance allows the engine to produce the best possible performance with the lowest emissions. Valve lash adjustments should be performed by an authorized Detroit™ maintenance or repair facility. 72 All information subject to change without notice. Copyright © 2017 DETROIT DIESEL CORPORATION DDC-SVC-MAN-0192