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Diesel particulate diffuser (DPD)
The Diesel Particulate Diffuser purifies exhaust gas of particulate matter.
The diffuser collects particulate matter in a filter and combusts it automatically after a certain amount has been col-
lected.
Be sure to observe the following to avoid problems with the Diesel Particulate Diffuser:
• White smoke may be produced during combustion.
• Do not regenerate the Diesel Particulate Diffuser in a badly ventilated room.
• Use genuine or the specified engine oil. (Refer to page 6-5).
Any other engine oil may cause problems with the engine and diffuser resulting in a malfunction.
• Use the specified standard fuel. (Refer to page 6-5).
Low-quality fuel, dewatering agent, and fuel additives may cause problems with the engine and diffuser resulting in
a malfunction.
• When a certain amount of particulate matter has been collected in the filter, the diffuser combusts the particulate
matter automatically.
However, the diffuser cannot complete regeneration, depending on the work conditions.
If regeneration is incomplete, an orange lamp will blink.
Execute manual regeneration of the diffuser using the specified procedures.
This does not imply any problems, but rather recovers the diffuser functions.
• The engine sound and hydraulic operation sound change during diffuser regeneration.
It does not imply any problems.
• White smoke may be produced temporarily from the tailpipe as particulate matter combustion progresses during
diffuser regeneration.
It does not imply any problems.
Do not execute regeneration in a poorly ventilated room.
• The smell of exhaust gas from the tailpipe is different from that of a normal diesel car.
The different smell is the effect of the exhaust gas purification function.
• White smoke is produced if the engine is started when the ambient temperature is low and the engine is cool. The
white smoke does not imply any problems.
• The time until completion of regeneration differs with the ambient temperature.
• Do not leave the machine unattended during regeneration.
ATTENTION: The Diesel Particulate Diffuser, the exhaust pipe the tail pipe and the exhaust gas from the exhaust
system are extremely hot while the engine is running, during Diesel Particulate Diffuser regeneration and immediately
after driving. Be careful not to inadvertently touch them. Otherwise, you could get burned. Keep the machine away
from any combustible object such as hay and paper dust.
ATTENTION: Be sure to stop the engine when you perform maintenance work to avoid getting burned.
ATTENTION: Be sure to close the engine hood properly. Otherwise, the exhaust gas generated during DPD regen-
eration melts the insulation and the other material inside the engine hood, causing damage to the machine
NOTICE: Do not modify the Diesel Particulate Diffuser and the exhaust system. Changing the orientation, length or
diameter of the exhaust pipe would adversely affect the exhaust system's exhaust emission reduction function.
3 - CONTROLS/INSTRUMENTS
3-36
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