Operators Manual

Table Of Contents
Inspect the entire air system for leaks daily. Look especially for torn air inlet piping
or boots and loose or damaged clamps. Have worn or damaged parts repaired or
replaced. Retighten loose connections.
Periodically inspect the air-to-air charge cooler for buildup of dirt, mud, etc. and
wash off using a mild soap solution. Check the charge cooler, ductwork, and
flexible connections for leaks and have repaired or replaced, as required.
Exhaust System and Exhaust Gas Recirculation (EGR) System
The exhaust manifold retaining bolts and other connections should be inspected for
leaks. The EGR system should be inspected for leaks periodically. Sealing of the
exhaust and EGR system is critical. Have worn or damaged parts repaired or
replaced.
Air Compressor
The air compressor incorporates three of the major systems of a diesel engine (air,
lubrication, and coolant). Proper inspection of air compressor would include
inspecting for air, oil, and coolant leaks. A failed air compressor can create
inadequate internal sealing resulting in excessive crankcase pressure, or allowing
an engine to ingest oil.
Aftertreatment System (ATS)
There is a need to periodically remove accumulated ash from the Diesel Particulate
Filter (DPF). All Detroit™ ATS-equipped engines will illuminate a dashboard
warning lamp indicating the need for ash cleaning.
Once the DPF has reached maximum ash volume, the recommended service for the
DPF is to remove the DPF and replace with a Reliabilt® clean DPF. Using alternate
cleaning methods, instead of replacing the DPF at the required interval, may result
in the cleaned DPF failing to reach the next ash clean interval. The aftertreatment
may experience damage to the DOC, DPF or SCR assemblies as a result of
alternate cleaning methods. Cleaning accumulated ash from the DPF is a necessary
part of vehicle maintenance.
The DEF filter is considered a maintenance item and will require periodic
maintenance.
Vibration Damper
The vibration damper should be inspected periodically and replaced if dented or
leaking. Heat from normal engine operation may, over a period of time, cause the
fluid within the damper to break down and lose its dampening properties. For this
reason the vibration damper must be replaced at time of normal major engine
overhaul, regardless of apparent condition.
DD Heavy Duty Platform Operators Manual
All information subject to change without notice. 119
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