How to Clean a DEWALT Battery Lawn Mower Safely

Step-by-step instructions

Step 1: Stop the mower on a safe surface

Move to a flat dry area away from people, pets, and ignition sources. Release the bail handle and any drive lever, then wait until the blade is completely still. Never rely on a stopped sound alone. Do not begin cleaning immediately after striking an object; inspect for damage first.

Step 2: Remove every starting source

Open the battery cover, remove all battery packs, and remove the safety key. Store them away from the work area so nobody can reinstall them. DEWALT warns that accidental startup can cause serious injury. Keep metal tools, moisture, and loose debris away from exposed battery contacts.

Step 3: Let wet clippings dry when practical

Fresh packed grass smears across the deck and chute. If the manual and conditions allow, leave the disabled mower in a secure ventilated place until buildup is less wet. Do not leave it in rain or direct intense sun, and never accelerate drying with a flame, heater, or powered blade.

Step 4: Position the mower by its manual

Wear cut-resistant gloves and use only the service or storage orientation approved for the exact model. Self-propelled and push models may have different handle-folding and tipping instructions. Keep the blade directed away from your body and support the mower so it cannot fall. Never reach under an unsupported deck.

Step 5: Scrape the underside without water

Use a plastic or wooden scraper to lift clumps from the deck, baffle, and discharge path, working away from the sharpened blade edges. Follow with a stiff nylon brush. DEWALT instructs owners not to spray the unit with water or other liquids. A hose or pressure washer can drive moisture into bearings, the motor, controls, and battery system.

Step 6: Clear the chute and grass catcher

Remove the bag or rear-discharge component only as the manual shows. Brush the chute, door, frame, and bag opening. Shake dry clippings from the catcher and brush its mesh so air can pass through. Do not refit a damp, clogged bag; reduced airflow can hurt collection performance.

Step 7: Clean wheels, controls, and vents

Brush grass from wheel axles, height-adjuster areas, handle pivots, controls, and motor vents without disassembling guarded parts. Use a dry cloth on handles and housings. Do not poke into vents or blast them with high-pressure air. Confirm each lever moves normally after debris is removed.

Step 8: Wipe fertilizer exposure promptly

DEWALT specifically cautions that fertilizers and garden chemicals are corrosive. If the mower crossed treated material, wipe exposed surfaces promptly with a lightly damp cloth, keeping moisture away from vents, contacts, and seams, then dry them. Never mix cleaning chemicals or apply solvent to plastic housings.

Step 9: Inspect before returning upright

With the mower still disabled, look for a bent or cracked blade, loose fasteners, damaged guards, frayed wiring, impacted wheel, or battery-bay contamination. Do not sharpen or remove the blade unless following the exact service procedure. Have damaged safety parts and uncertain blade conditions handled by qualified service.

Step 10: Store clean and disconnected

Return the mower to its operating or manual-approved storage position. Refit the dry catcher, but keep batteries and the safety key removed for storage as directed. Store mower and batteries in the temperature range stated in their manuals, away from fertilizer, chemicals, rain, and children. Cleaning is complete only when the tool cannot start unexpectedly.