Komatsu D155AX-8E0, Operation & Maintenance Manual

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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 mani-
fold and turbocharger for sticking dirt which can
cause a fire.
• If the Aftertreatment Devices Regeneration pilot lamp
(A) lights up while the fan is rotated 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 Aftertreatment
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.
The hydraulic fan reverse mode (fan reverse rotation) can be
used to remove insects and dirt sticking to the radiator core by
blowing air with the fan outward of the machine.
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 rotation within less than 5 minutes. If the fan re-
verse rotation is performed for a long time, DEF hose may freeze.
1.
Set the parking brake lever and work equipment lock lever to LOCK positions.
2.
Perform the engine warm-up operation.
If the warm-up operation is not performed, the air flow may be insufficient.
3.
After the warm-up operation, turn the fuel control dial to Low idle (MIN) position.
4.
Stop the engine.
5.
Open the engine side cover on the right and left sides of the machine.
6.
Turn the starting switch to ON position.
7.
Select Fan Reverse (1) on machine setting menu (b)
screen.
8.
To press switch F6.
EXPLANATION OF COMPONENTS OPERATION
3-74