1. Turn away a wing nut and disconnect spring latches. Disconnect hoses, remove cover and set aside.
2. Take out the filter element.
3. Examine the outer surface of the element. In case of severe contamination, replace the filter, if the element is partially contaminated, blow it with compressed air, directing the jet from the inside of the element to the outside. If the filter cannot be purged, replace it.
4. Wipe the inside of the filter housing.
5. Install a new filter element.
6. Install the filter housing cover in reverse order.