Komatsu HD325-8, Руководство по эксплуатации и техническому обслуживанию

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2.
Select “Cancel of Regeneration Disable”, and press EN-
TER switch, and the regeneration disable is canceled.
If 3 or more soot accumulation gradations (3) light up, the
regeneration may be started automatically.
REMARK
• When canceling the regeneration disable, release the ac-
celerator pedal, set the gear shift lever in NEUTRAL posi-
tion (N), set the parking brake switch to “PARKING” posi-
tion, then cancel the regeneration disable.
• The regeneration disable setting is also canceled by turn-
ing the starting switch to OFF position to stop the engine.
Komatsu Closed Crankcase Ventilation (KCCV)
KCCV is a device to clean the gas discharged from the engine
crankcase with the filter element and return it to the engine air
intake system.
NOTICE
• The KCCV filter element needs to be replaced every
2000 hours.
• If the engine is operated without KCCV filter element
or if a filter element other than the Komatsu genuine
element is used, the engine sucks oil and foreign ma-
terial which can cause a failure.
Komatsu recommends using Komatsu genuine KCCV
filter element.
• The filter element cannot be cleaned.
Never reuse the filter element since it can cause a per-
formance decrement of engine, and it result in a failure
even if it is cleaned.
HANDLE UREA SCR SYSTEM WARNING
Urea SCR system is a device which converts toxic nitrogen oxides (NOx) in the exhaust gas into harmless nitro-
gen and water. By spraying DEF into the exhaust gas, it decomposes and hydrolyzes to form ammonia (NH3)
and the ammonia selectively reacts with nitrogen oxides for the conversion to nitrogen and water.
The Komatsu Urea SCR System continuously monitors its operation conditions and stores information on inap-
propriate operations including malfunctions. The information is used for system diagnostics and also for Induce-
ment required by the authorities on engine systems that use Urea SCR systems. Inducement is intended for the
operator to take prompt actions to maintain and correct inappropriate behaviors of Urea SCR systems by utiliz-
ing visible and audible alerts , and engine power derate in addition. Alerts in Inducement of the Komatsu Urea
SCR System progresses step by step starting from visual indications on the machine monitor and audible
sounds to engine power derate to avoid getting into unsafe conditions.
The Komatsu Urea System also monitors recurrences of abnormalities of the system. Inducement in the recur-
rences is activated when another abnormality occurs within 40 hours after the first abnormality is fixed.
The Komatsu’s Urea is composed of two major systems, which are the DEF system and the SCR catalyst Ass’y.
EXPLANATION OF COMPONENTS OPERATION
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