250 OPERA TION

W Arning

When a r egeneration ocess, the temperatur e the exhaust will elevated. NOT park the vehicle with the exhaust outlet under low hanging overhead flammable objects such ees, awnings, etc., that could damaged elevated exhaust temperatur es. NOT attempt r egenerate inside a garage enclosed the tail pipe attached exhaust ventilation system the hose material may not rated for the high temperatur

Press and hold the top part the DPF Smart switch momentarily initiate the regeneration.

During the icons the switch will shut The HEST indicator the instrument cluster will light notify high exhaust

For aftertreatment DPF filter systems, the engine speed may ramp high 1,250 rpm.

Parked regeneration will take between and minutes

After regeneration has completed and the exhaust temperature has returned normal, the HEST indicator will shut

T o stop press the switch down the inhibit position (if When the bottom the switch regeneration The switch will remain locked this position and the light will stay The driver has the option stopping a regeneration the vehicle area where elevated exhaust temperatures will pose a hazard under area where there flammable

Note: The HEST lamp will remain comes during the and remain until the exhaust temperature returns

Caution

Failur e perform a r egeneration a timely manner after notification may r esult engine derate, a clogged DPF , damage the DPF and engine shutdown.

Danger

During the regeneration process, the temperature the exhaust gases will elevated. NOT park stop for extended period under low hanging overhead flammable objects such trees, awnings, structures, etc., that could damaged elevated exhaust temperatures. Further , the vehicle being operated area where flammable vapors exist, the regeneration process must interrupted. Failure heed these cautions may result fire explosion causing serious personal injury death.

Note: not initiate a parked regeneration the vehicle a location that may hazardous (i.e., close proximity flammable materials gases), a parked regeneration stopped the vehicle operator , should initiated a later time when the vehicle a safe location. However , a parked regeneration stopped too many the vehicle must taken a MACK service facility . The service facility will use a service tool manually initiate the regeneration.

W Arning

The temperatur e the exhaust system components during the r egeneration ocess 350 degr ees C (660 F). The exhaust gas leaving the system can r each 505 degr ees C (930 F). V arious factors (including ambient temperatur e and duration the r egeneration ocess) determine when these components will r eturn normal operating temperatur e after r egeneration has completed. extr emely car eful ound these hot components. Contact with these components can r esult serious personal injury .

Caution

When the inhibit position essed, the switch will r emain a locked position. ther efor immediately set the switch back the neutral position when safe so. Failur e set the switch back the neutral position may r esult engine clogged diesel particulate filter damage the filter .