Komatsu H70051 Series Operation & Maintenance Manual page 328

MAINTENANCE PROCEDURE
NOTICE
• Do not clean the element before the air cleaner clogging caution lamp on the machine monitor
lights up, or the yellow piston of the dust indicator laps over the peripheral red zone (7.5 kPa,
2
{0.076 kg/cm }).
If the element is cleaned frequently before the air cleaner clogging caution lamp on the machine
monitor lights up or the yellow piston of the dust indicator laps over the peripheral red zone
(7.5 kPa, {0.076 kg/cm
cleaning efficiency will also go down.
In addition, during the cleaning operation, more dirt stuck to the element will fall inside the inner
element.
• If any dirt enters the engine, it can damage the engine. Be sure to stop the engine before checking,
cleaning, or servicing the air cleaner. Do not check, clean, or service the air cleaner in strong winds,
or in a dusty place.
In addition, during the cleaning operation, more dirt stuck to the element will fall inside the inner
element.
• Replace the outer element if it is cleaned 6 times repeatedly or used throughout a year. Replace the
inner element as well at the same time.
METHOD FOR CHECKING AIR CLEANER
NOTICE
The electric air cleaner clogging sensor and dust indicator are used to indicate the clogging on the air
cleaner. The electric air cleaner clogging sensor indicates the cleaning timing of the air cleaner element
and the dust indicator indicates the level of clogging.
Check the dust indicator before operating the machine so that cleaning of the air cleaner element is not
required during operation.
1.
Open the engine side cover (1) on the right side of the ma-
chine.
2.
Clean the element when the yellow piston shown in the
dust indicator (2) display of the air cleaner enters the red
(7.5 kPa, {0.076 kg/cm
After the cleaning, press the dust indicator button to reset
it.
If the yellow piston enters the red (7.5 kPa, {0.076 kg/cm
position soon after the cleaning, the element must be re-
placed.
For the replacement of the element, see "METHOD FOR
REPLACING AIR CLEANER ELEMENT (4-19)".
4-16
2
}), the air cleaner will not be able to display its performance fully, and the
2
}) position.
2
})
MAINTENANCE