Regen Operations
Notice: Follow these guidelines for engines that comply with EPA07 or newer regulations, or damage may occur to the aftertreatment device (ATD) and the warranty may be compromised.
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Use ultralow-sulfur diesel with 15 ppm sulfur content or less.
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Do not use fuel blended with used engine lube oil or kerosene.
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Use only approved engine lube oil. For lists of engine oils approved for Detroit Diesel engines, refer to the Engine Operator Manual, accessible on Lubricants, Fuels & Coolants on the DTNA Portal. For third party engines, please refer to the engine manual.
Important: Using non-specification fuels or oils can lead to shortened diesel particulate filter (DPF) cleaning or replacement intervals.
Important: See the engine manufacturer's operation manual for complete details and operation of the ATS.
Parked regen is initiated by selecting OK when the driver display screen shows ‘Parked Regen Required.’ See Fig. . If the vehicle is equipped with the optional digital STOP REGEN switch, parked regen can be stopped by selecting OK while the regen is in progress. See Fig. .
Some vehicles may be equipped with a regen inhibit switch. See Fig. . To stop a regen in progress or prevent the start of a regen, press the lower half of the switch. Regen is then delayed until the switch is no longer active.
Note: Parked regen can be initiated only when the DPF lamp is illuminated.
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Start Regen Message Screen
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Stop Regen Message Screen
Fig. 1, Parked Regen Message Screens
Fig. 2, Regen Inhibit Switch
Warning: During parked regen, exhaust temperatures are very high and could cause a fire, heat damage to objects or materials, or personal injury to persons near the exhaust outlet.
Before initiating a parked regeneration, make certain the exhaust outlets are directed away from structures, vegetation, flammable materials, and anything else that may be harmed by prolonged exposure to high heat.
To initiate a parked regen, perform the following steps:
- Park the vehicle away from all flammable materials, put the transmission in neutral, and set the parking brake.
- Start and warm the engine until the coolant temperature is at least 150°F (66°C).
- Select OK when the DPF screen is displayed on the driver display screen. See Fig. . Select OK again to confirm regen. As the regen process is initiated, engine rpm increases and the HEST lamp illuminates to indicate extremely high exhaust temperatures.
- The regen cycle will finish after 20 to 60 minutes, at which time engine idle speed drops to normal and the vehicle can be driven normally. The HEST lamp is extinguished when vehicle speed exceeds 5 mph (8 km/h) or the system has cooled to normal operating temperature.
- To stop a parked regen at any time during the process:
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depress the clutch pedal, brake pedal, or accelerator pedal;
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select OK on the parked regen screen while the regen is active, then select OK again to confirm;
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press and hold the regen inhibit switch until idle returns to normal;
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shut down the engine.
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Important: The driver is responsible for ensuring, during the entire regen cycle, that anything that could be harmed by exposure to high heat does not come in contact with the exhaust gases flowing from the outlets.