Clean cartridge every 100 hours. To clean cartridge, gently tap on end with handle of screwdriver. Replace cartridge every 400 hours. Clean and replace more often under dusty conditions.
CAUTION
Do not use pressurized air or solvents to clean foam. Pressurized air can damage foam; solvents will dissolve foam.
Cyclonic air cleaner
Air cleaner body
Safety Filter Cartridge
Air cleaner cartridge
Cover
Rubber Valve 
1.Unlock and remove fastening devices to remove cover and retainers, if equipped.
2.Remove cartridge from air cleaner body and inspect. Replace if very dirty or any damage occurs to cartridge.
3.Carefully clean out air cleaner cover and around base. Do not allow debris to enter engine.
4.Install clean or new cartridge in body.
5.Install retainers and cover and lock with clamps or knob.
Safety Filter Installation
Several models with the cyclonic air cleaner are also equipped with a safety filter. Replace safety filter cartridge every 600 hours, or with every other air filter cartridge replacement. To replace, pull carefully to remove from air cleaner body, ensure no debris enters engine. Install new safety cartridge first, then install air filter cartridge over safety filter.
Oval air cleaner
Knob
Cover
Nut
Retainer
Cartridge
Base screw
WARNING
Ensure air cleaner, retainer, and cover are properly installed before starting engine.
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