Case WX145 Operator's Manual page 206

MAIN FILTER ELEMENT - CLEANING
Never clean filter elements by beating them against
hard objects.
After 3 cleaning cycles or after one year of operation
at the latest, the main filter element must be
replaced.
Never clean filters with petrol and flammable or hot
liquids.
Cleaning with compressed air is suitable if the filter
element is to be re-used immediately.
The air pressure at the nozzle must not exceed
6 bars (87 psi).
The compressed air nozzle has to be held at about
3 cm (1.18 in) from the filter element.
Start cleaning the filter surface by blowing dry com-
pressed air diagonally from outside into the filter ele-
ment.
Continue cleaning by blowing compressed air from
inside against the element.
Cleaning is finished when all visible dust has been
removed from the element.
CHECKS
Checks before installation of the main filter element:
Check the filter paper with the help of a lamp bulb.
Filter damage is indicated where the light shines
brightly through the paper. If damaged, replace the
main filter element immediately.
Check the seal visually. If the seal is damaged,
replace the main filter element immediately.
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