Komatsu D61EX-24 Operation & Maintenance Manual page 176

OPERATION
HANDLE Komatsu Diesel Particulate Filter (KDPF)
• Exhaust gas temperature may increase higher than the previous models during the aftertreatment
devices regeneration and the high temperature may last after the completion of regeneration.
Avoid getting near the exhaust pipe outlet and around the aftertreatment devices to prevent being
burnt.
Also, keep combustible materials away from the exhaust pipe outlet and around the aftertreatment
devices to prevent a fire.
• When there are thatched houses, dry leaves or pieces of paper near the job site, set the system to
the regeneration disable to prevent fire hazards due to highly heated exhaust gas during the after-
treatment devices regeneration.
KDPF is a device to capture soot in the exhaust gas to purify
the exhaust gas.
If soot is accumulated to a certain level in KDPF, a purification
process to burn the soot is performed automatically to keep the
filtering performance of KDPF high.
This purification process is called the "regeneration".
If operations which lower the purification function of KDPF con-
tinues for long hours, the regeneration is performed to protect
the KDPF system, regardless of the quantity of the accumulat-
ed soot.
During the regeneration of KDPF, aftertreatment devices regen-
eration pilot lamp (1) stays lit on the machine monitor.
REMARK
Even if aftertreatment devices regeneration pilot lamp (1) lights
up, the machine does not need to be stopped and the work can
be continued, unless the caution lamp is displayed at the cen-
ter of the machine monitor.
During the regeneration of KDPF, the temperature of KDPF or
the engine room becomes high due to combustion of the soot.
Be careful of the coolant temperature or oil temperature, and
operate the machine to avoid overheat of coolant and oil.
The KDPF regeneration is performed automatically. However, the accumulated soot may not be burnt sufficient-
ly and the filtering function may not be improved under certain operating conditions.
In that case, KDPF soot accumulation caution lamp (2) lights
up. If this lamp lights up, stop the machine in a safe place and
perform the manual stationary regeneration.
If hydraulic fan reverse operation is performed while the after-
treatment devices regeneration pilot lamp or the KDPF soot ac-
cumulation caution lamp is lit, the accumulated soot may not be
burnt sufficiently and the filtering function may not be improved.
Wait until the aftertreatment devices regeneration pilot lamp or
the KDPF soot accumulation caution lamp goes out, and then
perform hydraulic fan reverse operation.
2 types of machine monitor display require the manual station-
ary regeneration, depending on the level of urgency.
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CAUTION
EXPLANATION OF COMPONENTS
3-125