Operators Manual

Preventive Maintenance Intervals
The following guide establishes preventive maintenance intervals. These
recommendations should be followed as closely as possible to obtain long life and
optimum performance from your engine. When performed on a regular basis,
changing the engine oil, coolant, and filters is the least costly way of obtaining safe
and reliable vehicle operation. Added benefits and savings occur when you check
that the valves, fuel injectors, oil and cooling circuits are in good working order
during oil changes.
The intervals shown apply only to the maintenance functions described. These
functions should be coordinated with other regularly scheduled maintenance.
Scheduled Maintenance Intervals
Before placing your new vehicle in service, determine the correct maintenance
schedule application for your intended use of the vehicle. Vehicles equipped with
the optional maintenance system will alert the operator, via the instrument panel,
when routine maintenance intervals are due. The maintenance system may adjust
the maintenance intervals by monitoring vehicle parameters over the life of the
vehicle. After performing a maintenance interval reset, the maintenance system will
collect data for the next fifty hours before the next interval prediction is calculated.
Schedule Use
Complete each maintenance operation at the required interval. The intervals are
based on a collaboration of field and fleet data. For a more accurate analysis of
when fluids should be changed, such as engine oil, refer to publication
Engine
Requirements; Lubricating Oil, Fuel and Filters and publication Coolant Selections
for Detroit™ Engines, available from authorized Detroit™ distributors and dealers.
Each maintenance table shows which maintenance operation must be performed at
the recommended interval (in miles, kilometers, and hours).
NOTE: Failure to maintain the cooling system at required
concentrations will result in severe damage to the engine cooling
system and related components. Refer to the "Coolant Selections and
Maintenance" section.
Cooling System Flush and Fill
Proper maintenance of the cooling system is vital to its performance and longevity.
The cooling system must, on a constant basis, deal with cavitation, temperature /
pressure swings, and continuous threats on the additive package. Once the additives
have been depleted from the coolant, it will only be a matter of time until the
engine components suffer. Refer to section "Cooling System Fill Procedure"
Cooling System Inspection - Inspect the cooling system as follows:
DD Heavy Duty Platform Operators Manual
All information subject to change without notice. 115
DDC-SVC-MAN-0189 Copyright © 2022 DETROIT DIESEL CORPORATION