Komatsu WA250PT-5H, Operation & Maintenance Manual

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MAINTENANCE
Service procedure
When required
4-21
4. Clean the interior of the air cleaner body, cover (3) and
evacuator valve (6).
NOTICE
The inner element must not be used again even after its
cleaning. When replacing the outer element, replace the
outer element at the same time.
5. Direct dry compressed air (Max. 0.69 MPa (7 kgf/cm2, 99.4
PSI)) from the inside of the outer element along its folds.
Then direct the compressed air from the outside along the
folds, and again from the inside.
Replace any outer element, which has been cleaned 6
times or used for one year. Replace the inner element at
the same time.
Replace both inner and outer elements when the dust
indicator red piston appears soon after installing the
cleaned outer element even though it has not been
cleaned 6 times.
6. If small holes or thinner parts are found on the element
when it is checked by shining a light through it after clean-
ing, replace the element.
NOTICE
When cleaning the element, do not hit or beat it against
anything.
Do not use an element whose folds, gasket or seal are
damaged.
CAUTION
When installing the cover (3), check O-ring (7) and replace
it if there are any scratches or damage.
7. Set the cleaned outer element in position, then secure cover
(3) with mounting clips (2).
8. Press the button of dust indicator (1) to return the red piston
to its original position.