Komatsu H75051, Operation & Maintenance Manual

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• Even just after the regeneration is completed, the soot accumulation level may not be “0”. This is caused by
the accumulated noncombustible material in the exhaust gas and is not a failure.
• Since noncombustible matter which cannot be burnt by the regeneration is accumulated in the filter of
KDPF, the filter needs to be cleaned or replaced at regular intervals.
• The engine speed or engine sound or exhaust sound may change during or after the regeneration. This is
caused by the control for better regeneration and this is not a failure.
• The smell of the exhaust gas is different from that of the conventional diesel engine because of the exhaust
gas filtering function.
• White smoke may be discharged for a short time just after the engine is started or during the regeneration
in the cold season, but this is not a failure.
• Komatsu recommends using Komatsu genuine engine oil for KDPF.
If engine oil other than Komatsu genuine oil for KDPF is used, it may shorten cleaning interval of KDPF
filters, adversely affect the engine such as deteriorated oil may reduce lubricating function, and it may
cause failure.
In addition, the regeneration interval may be shortened and the fuel consumption may increase.
If the mixing ratio of the bio-fuel in the diesel fuel is high, the regeneration of KDPF may become more fre-
quent.
When the degree of emergency is low
• If KDPF soot accumulation caution lamp (2) lights up in
yellow (action level (4): “L01”), screen (A) is displayed first.
• The action level goes out 2 seconds after and the screen
changes to standard screen (B).
• If the machine is completely stopped, the display switches
to “Aftertreatment Devices Regeneration” screen (C) after
3 seconds only the first time. If, however, the manual sta-
tionary regeneration is not performed, the display returns
to standard screen (B) after 30 seconds.
Then, if the accumulated soot does not decrease, the “Af-
tertreatment Devices Regeneration” screen (C) is dis-
played for 30 seconds every 2 hours.
• If KDPF soot accumulation caution lamp (2) lights up in
yellow, stop the machine in a safe place and perform the
manual stationary regeneration.
EXPLANATION OF COMPONENTS OPERATION
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