Kohler — Heavy-Duty Air Cleaner Element Service

A Kohler service procedure — check it applies to your exact model before use.

Procedure

Unhook the two retaining clips and remove the end cap from the air cleaner housing.
Pull the air cleaner element out of the housing.
After the element is removed, check the condition of the inner element. It should be replaced whenever it appears dirty, typically every other time the main element is replaced. Clean the area around the base of the inner element before removing it, so dirt does not get into the engine.
Do not wash the paper element and inner element or use compressed air, this will damage the elements. Replace dirty, bent or damaged elements with new genuine Kohler elements as required. Handle the new elements carefully; do not use if the sealing surfaces are bent or damaged.
Check all parts for wear, cracks, or damage. Replace any damaged components.
Install the new inner element, followed by the outer element. Slide each fully into place in the air cleaner housing.
Reinstall the end cap so the dust ejector valve is down, and secure with the two retaining clips.

Source: manual:Kohler-Service-Repair-Manual-Command-CV17-CV18-CV20-CV22-CV25-CV22-CV23-CV26.pdf. Figures and steps are as documented; always cross-check against the official manual and any later revisions for your exact serial number before servicing.