Komatsu PC1250-11 Original Instructions Manual page 183

OPERATION
When the Action level "L03" lights up in red, and the KDPF
soot accumulation caution lamp (2) lights up in red, engine
power deration is activated. To restore engine power, it is
necessary to perform "PROCEDURE FOR MANUAL STA-
TIONARY REGENERATION".
If soot accumulated in the KDPF exceed the defined level
without performing PROCEDURE FOR MANUAL STATION-
ARY REGENERATION, the Action level "L04" lights up in
red. Stop the machine immediately and ask your Komatsu
distributor.
REMARK
• The soot accumulation level (4) can be checked on "After-
treatment Devices Regeneration" screen. Press the switch
F6 on the standard screen, and the "Aftertreatment Devi-
ces Regeneration" screen of the user menu is displayed.
• The soot accumulation quantity may decrease even if the
regeneration is not performed, depending on the operating
condition. It is because the soot in the filter of KDPF can
be burnt by the high-performance catalyst and high-tem-
perature exhaust heat.
• 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
3-117