Komatsu D61EX-24 Operation & Maintenance Manual page 123

EXPLANATION OF COMPONENTS
MACHINE SETTINGS
Each item of this menu (b) is used for setting items of machine.
REVERSE HYDRAULIC FAN
NOTICE
• After stopping the engine, check around the engine for sticking dry leaves or dirt.
In particular, carefully check around the exhaust manifold, turbocharger, KDPF, and SCR for stick-
ing dirt which can cause a fire.
• If the aftertreatment devices regeneration pilot lamp
(A) lights up while the fan rotates in reverse, the en-
gine speed may decrease to 1000 rpm, regardless of
the position of the fuel control dial.
In this case, the fan speed decreases and sufficient air
flow for cleaning the radiator cannot be obtained. Ac-
cordingly, wait under the current condition until after-
treatment devices regeneration pilot lamp (A) goes
out.
After the lamp goes out, the fan can rotate in reverse
by increasing the engine speed.
REMARK
• If the fan reverse operation is performed while aftertreat-
ment devices regeneration pilot lamp (A) is lit, the engine
speed may not increase even if the fuel control dial is set
to High idle (MAX) position, but this is not a failure.
• If fan rotates in reverse with high speed for 10 minutes or
more, engine speed lowers automatically in order to pro-
tect the hydraulic component, and the screen shown in the
figure may be displayed, but this is not a failure.
The hydraulic fan reverse mode (fan reverse rotation) can be
used to remove insects and dirt sticking to the radiator core by
blowing air inward the machine with the fan.
Before starting the hydraulic fan reverse, check that there is no
combustible substance in the periphery which may be sucked
in the fan.
In a cold circumstance, perform the cleaning by fan reverse ro-
tation within less than 5 minutes. If the fan reverse rotation is performed for a long time, DEF hose may freeze.
1.
Place the parking brake lever and work equipment lock lever in LOCK position.
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OPERATION