Freightliner BUSINESS CLASS M2 Driver Manual (Page 72 Of 190)

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Table of Contents as the vehicle is driven normally. However, if the en- gine isn't running hot enough, the electronic controls may initiate an active regen, whereby extra fuel is injected into the exhaust stream to superheat and reduce the soot trapped in the DPF to ash. Active regen happens only when the vehicle is moving above a certain speed, determined by the engine manufacturer. See your engine operation manual for complete details. Both active and passive regen hap- pen automatically, without driver input. WARNING Active regeneration can occur automatically any- time the vehicle is moving. The exhaust gas tem- perature could reach 1500°F (800°C), which is hot enough to cause a ﬁre, heat damage to objects or materials, or personal injury to persons near the exhaust outlet. The exhaust temperature can remain high even after the vehicle has stopped. When stopping the vehicle shortly after an auto- matic regen, ensure the exhaust outlets are di- rected away from structures, trees, vegetation, ﬂammable materials, and anything else that may be damaged or injured by exposure to high heat. See Regen Switches , below, for instructions on preventing automatic regen if necessary. When operating conditions do not allow for ATD ﬁlter cleaning by active or passive regen, the vehicle may require a driver-activated parked regen. When this occurs, the DPF lamp illuminates, indicating that a regen is required. The driver must either bring the vehicle up to highway speed to increase the load (thus starting an active regen), or park the vehicle and initiate a parked regen. See Regen Switches , below, for instructions on initiating a parked regen. Regen Switches The regen request switch, located on the dash, is used to initiate a parked regen. See function of the switch varies by the engine make and model in the vehicle. See the engine operation manual for switch operation details. Some vehicles may be equipped with a regen request/inhibit switch. See 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 Regen is then delayed until the switch is no longer active. Fig. 7.1. The Fig. 7.2. To stop a regen NOTE: The regen switch can initiate a parked regen only when the DPF lamp is illuminated. 03/09/2012 Fig. 7.1, Regen Request Switch 07/30/2009 Fig. 7.2, Regen Request/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 per- sons near the exhaust outlet. Before initiating a parked regeneration, make cer- tain the exhaust outlets are directed away from structures, trees, vegetation, ﬂammable materi- als, and anything else that may be damaged or injured by prolonged exposure to high heat. To initiate a parked regen, perform the following steps. 1. Park the vehicle away from all ﬂammable materi- als,set the parking brake, and put the transmis- sion in neutral. Engines f610848 f610944 7.2 Table of Contents Previous Page Next Page

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Table of Contents 4
Vehicle Access 11
Instruments 21
Controls 36
Cab Features 53
Engines 70
Drivetrain 88
Steering and Brake Systems 119
Fifth Wheels and Trailer Couplings 127
Pretrip and Post-Trip Inspections and Maintenance 138

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