Komatsu PC220LC -8 Operation & Maintenance Manual page 283

MAINTENANCE PROCEDURE
Cleaning Outer Element
NOTICE
Before and after cleaning the element, do not leave or keep it in direct sunlight.
1. Open the rear door at the left side of the machine, remove 4
hooks (2), then remove cover (3).
NOTICE
Never remove the inner element (6). It will allow dirt to enter and cause
failure of the engine.
Do not use a screwdriver or other tool.
2. Hold the outer element (5), rock it lightly up and down and to
the left and right, and rotate the element to the left and right to
pull it out.
3. When the outer element (5) has been removed, check that the
inner element has not come out of position and is not at an
angle. If is is at an angle, insert your hand and push it in
straight.
4. After removing the outer element (5), cover the inner element
(6) with a clean cloth or tape to prevent dirt or dust from
entering.
5. Wipe off or brush off the dirt stuck to cover (3) and the inside of
the air cleaner body (7).
6. Remove any dirt or dust that is accumulated to evacuator valve
(4) installed to cover (3).
NOTICE
When cleaning the element, do not hit or beat it against anything.
7. Direct dry compressed air (less than 0.69 MPa (7 kg/cm
PSI)) to the outer element from inside along its folds, then
direct it from outside along its folds and again from inside.
1) Replace the outer element which has been cleaned 6
times repeatedly or used throughout a year. Replace the
inner element at the same time.
2) Replace both inner and outer elements when the air cleaner clogging monitor (1) lights up soon after
installing the cleaned outer element even though it has not been cleaned 6 times.
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, 99.4
MAINTENANCE