1. Check the Restriction
Measure the restriction of the air cleaner with a Donaldson filter service indicator, service gauge, or a water manometer. Replace the filter only when the restriction level has reached the maximum recommended by the engine or equipment manufacturer or on a regular service schedule.
2. Clean out the Vacuator™ Valve
Remove the Vacuator Valve and clean out any dust found in the drop tube. Reinstall Vacuator Valve or replace it if is worn or damaged.
3. Remove the Primary Filter
Unlatch and remove the service cover on the FKB air cleaner. To remove the primary filter, press and rotate the filter counter-clockwise until free. Then extract the primary filter by slowly pulling it out of the housing.
Note: Avoid dislodging contaminant from the filter as it is removed from the air cleaner housing.
4. Remove the Safety Filter or Liner
Next remove the safety filter (replace at every third primary filter change) or support liner by pulling it straight out. This allows necessary access to properly clean the primary filter’s seal surface.
Inspect the seal surface and housing for any damage. Replace the complete air cleaner if damage is present.
It is not necessary to replace the support liner unless it is damaged. If you are reusing the safety filter keep it clean while servicing the housing to avoid contamination.
5. Clean the Inside Surface
Block the outlet tube of the air cleaner using a small dampened towel prior to cleaning the seal and locking surfaces to avoid contaminating the induction system. With a clean damp cloth, thoroughly clean the inside surface of the housing, seal and lock surfaces.
Note: Failure to clean the inside surface may cause contaminants to be introduced to the outlet tube or onto the seal area of the primary filter during reinstallation resulting in a leak for dirty air.
6. Inspect the New Filters
Inspect the new primary and safety filters for any damage, voids, cuts, tears, or indentations in the media or urethane sealing surfaces.
7. Install the Safety Filter
Remove the dampened towel from the outlet tube that was used to protect the induction system during servicing. Install the safety filter or support liner by pressing it firmly in place until seated. When properly fitted, it should fit snugly inside the outlet tube.
8. Install the Primary Filter
Install the new primary filter by pressing and rotating the filter clockwise until fully fitted against the stop.
9. Fasten the Service Cover
The “INLET” arrow on the cover should line up with the air cleaner inlet.
Do not force the cover onto the air cleaner. It should go on easily with no extra force.
Re-fasten the latches which secure the cover. Make sure that latches penetrate the slots in both the body and the cover.
Note: If the cover does not fit flush to the body, the primary filter is not properly seated in the housing. Recheck the primary and safety filter installation following the proper installation procedure so they become fully seated.
10. Reset the Filter Indicator and Inspect the Air Cleaner System
If your system has a restriction indicator, reset the device.
Inspect and torque all clamps, bolts and connections in the entire air intake system. Check for holes in piping, and repair if needed.
View the service steps and best practices for the Donaldson FKB RadialSeal housings.