Diesel Particulate Filter - Jacobsen LF550-H-T4F Safety, Operation And Maintenance Manual

9 MAINTENANCE

9.11 DIESEL PARTICULATE FILTER ______________________________________________

During the operation of the mower, the level of particle material will increase in the Diesel Particulate Filter (DPF)
system. The periodic Regen of the DPF system is needed to remove particle material. During an Active or Parked
Regen, the engine will use more fuel. The DPF system operates in one of four states.
During Active or Parked Regen, the temperature of the exhaust components can be more than 1150° F (625° C). To
prevent burns, do not touch a hot exhaust system and do not stand or reach into exhaust gas area from exhaust
pipe outlet. To prevent fires, make sure the engine area is kept clean and the grass clippings are not near exhaust
components.
Make sure the exhaust gas from the exhaust pipe is not blocked and there is enough space between the exhaust
pipe and objects. Park the mower on concrete or gravel during Parked Regen. During Active or Parked Regen
exhaust gas from the exhaust pipe can cause turf damage or fire.
Passive Regen State - The engine operates in the Passive Regen state during normal engine operation. The exhaust
temperature can be more than 572° F (300° C).
Inhibit Regen State - When the Regen Inhibit is selected on the LDU, engine can not enter the Active or Parked
Regen states. Inhibit Regen does not prevent the Passive Regen. If the fuel tank is near empty, select the Regen Inhibit
on the LDU until the fuel tank is filled.
Active Regen State - When the level of particle material reach a certain point, the engine will enter Active Regen state.
Operation of the mower is not changed. The exhaust temperature can be more than 1150° F (625° C) during Active
Regen. The high exhaust temperatures during Active Regen will illuminate the High Exhaust Temperature light.
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