Komatsu D61EX-24 Operation & Maintenance Manual page 178

OPERATION
REMARK
• Soot accumulation level (4) can be checked on "Aftertreat-
ment Devices Regeneration" screen.
Press switch F6 on the standard screen to display "After-
treatment Devices Regeneration" screen of the user menu.
• Since the soot in the filter of KDPF can be burnt by the
high-performance catalyst and high-temperature exhaust
heat, the soot accumulation quantity may decrease even if
the regeneration is not performed, depending on the oper-
ating condition.
• Even when the soot accumulation level is low, the auto-
matic regeneration may be performed and the manual sta-
tionary regeneration may be requested to protect the sys-
tem. In particular, if engine is kept running with no load, the
regeneration frequency may increase, but this is not a fail-
ure.
• Even just after the regeneration is completed, the soot ac-
cumulation level may not be "0". This is caused by the ac-
cumulated 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 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 fil-
tering 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 fil-
ters, 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 frequent.
EXPLANATION OF COMPONENTS
3-127