Komatsu PC78US-6 Operation & Maintenance Manual page 201

MAINTENANCE PROCEDURE MAINTENANCE PROCEDURE
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.
4. Direct dry compressed air (Max. 0.69 MPa (7 kgf/cm , 99.4
PSI)) from the inside of the outer element along its folds. Then
below with air along the folds from the outside, and finally blow
again from the inside.
1) Replace any outer element, which has been cleaned 6
times or used for one year. Replace the inner element at
the same time.
2) 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.
3) Remove one seal from the element whenever the element
has been cleaned.
5. If small holes or thinner parts are found on the element when
it is checked by shining a light through it after cleaning, 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.
6. Set the cleaned outer element (4) in position.
4 - 18
MAINTENANCE MAINTENANCE