DeWalt 12AVP2R3739 Lawn Mower Manual

The DeWalt 12AVP2R3739 is a 20-inch cordless electric lawn mower powered by two 20V MAX* 10.0Ah lithium-ion batteries, featuring a brushless motor, 7-position single-lever height adjustment (1.5" to 4"), 3-in-1 mulching, bagging, and side-discharge capability, push-button start, foldable handle for storage, and a durable steel deck. Below are key sections for safety, features, assembly, operation, maintenance, and troubleshooting.

Features at a Glance

Key components: Steel cutting deck, Brushless motor, Battery ports (2x), Height adjustment lever, 3-in-1 discharge chute, Foldable handle, Safety key, Grass bag.

Assembly Instructions

Unpack all parts and inspect for damage. Assembly requires a Phillips screwdriver and adjustable wrench.

1. Attach the lower handle: Align holes on lower handle with brackets on deck, secure with provided bolts and washers.
2. Attach the upper handle: Slide upper handle onto lower handle, align holes, and secure with knobs or bolts.
3. Install the grass bag: Hang bag onto rear bag hooks until it clicks into place.
4. Install batteries: Insert two fully charged 20V MAX batteries into the battery ports on the mower.
5. Attach discharge chute: For side-discharge, snap chute into opening on right side of deck.

WARNING! Ensure mower is turned OFF and safety key is removed during assembly. Tighten all fasteners securely.

First-Time Setup

Before first use, charge batteries fully and set cutting height.

1. Charge batteries: Use DeWalt 20V MAX charger (included). Charge both batteries until indicator shows full.
2. Set cutting height: Adjust lever to desired height (recommend 2.5"-3" for first mow).
3. Select discharge mode: Install bag for collection, chute for side-discharge, or plug for mulching.
4. Insert safety key: Push safety key fully into slot near handle.
5. Test operation: Press and hold safety handle, then press start button in an open area.

CAUTION! Clear mowing area of stones, sticks, and debris. Do not mow wet grass.

Specifications

• Model: DeWalt 12AVP2R3739
• Power: 2x 20V MAX* 10.0Ah Lithium-Ion Batteries
• Cutting Width: 20 inches
• Cutting Height Range: 1.5" - 4" (7 positions)
• Deck Material: Powder-coated steel
• Weight (without batteries): 55 lbs
• Run Time (approx.): Up to 60 minutes per charge (varies with grass conditions)
• Charge Time: Approx. 60 minutes per battery with rapid charger
• Warranty: 3-year limited warranty
• Included: Mower, 2x 20V MAX 10.0Ah Batteries, Rapid Charger, Grass Bag, Side-Discharge Chute, Mulching Plug, Safety Key

Controls and Operation

Main controls located on handle. Safety handle must be engaged to start mower.

Handle Controls: Safety handle (must be held), Start/Stop button, Height adjustment lever, Battery charge indicators.

Operation: Insert safety key. Hold safety handle against handlebar. Press and hold start button—blade will engage. Release safety handle or start button to stop blade. Always walk behind mower; do not pull backward while blade is engaged. Adjust height with lever (all wheels adjust simultaneously). Monitor battery indicators; recharge when one bar remains.

Cutting Modes

3-in-1 system: Mulching, Bagging, Side-Discharge.

1. Mulching: Install mulching plug in rear discharge opening. Cuts clippings finely and returns them to lawn as fertilizer.
2. Bagging: Attach grass bag to rear hooks. Collects clippings for disposal.
3. Side-Discharge: Attach side-discharge chute. Ejects clippings to the side (right).

Tip: For best mulching, mow when grass is dry and cut no more than 1/3 of grass height at a time.

Battery Care & Charging

Use only DeWalt 20V MAX lithium-ion batteries and charger.

1. Charging: Insert battery into charger; plug into 120V outlet. LED indicates charging (red) and full (green).
2. Storage: Store batteries at room temperature. For long storage (>30 days), store at 50% charge.
3. Run Time: Varies with grass thickness and height. For longer run time, mow frequently and keep blade sharp.
4. Battery Indicators: Press button on battery to check charge level (4 LEDs = full).

WARNING! Do not expose batteries to fire or water. Use only DeWalt charger. Do not disassemble batteries.

Maintenance & Cleaning

Regular maintenance ensures optimal performance and longevity.

1. After each use: Clean underside of deck with brush or hose (ensure mower is OFF and batteries removed).
2. Blade sharpening: Check blade monthly. Sharpen or replace if dull or damaged (use blade removal tool).
3. Wheel lubrication: Apply light oil to wheel axles if wheels become stiff.
4. Inspect fasteners: Periodically check handle and deck bolts for tightness.

CAUTION! Always remove safety key and batteries before performing any maintenance. Wear gloves when handling blade.

Storage Guidelines

Proper storage extends mower life.

• Clean mower thoroughly before storage.
• Remove batteries and store separately in cool, dry place.
• Fold handle: Loosen knobs, fold handle down over deck.
• Store in dry, covered area to prevent rust.
• For winter storage: Fully charge batteries, then store at 50% charge. Consider adding fuel stabilizer (not applicable).

Tip: Apply a thin coat of automotive wax to steel deck to prevent corrosion.

Safety Information

Read all instructions before use. Keep bystanders and pets away.

• Wear sturdy shoes, eye protection, and long pants.
• Clear mowing area of objects that could be thrown.
• Do not mow on steep slopes (over 15 degrees).
• Never leave mower unattended with batteries inserted.
• Do not operate in rain or on wet grass.
• Keep hands and feet away from cutting blade.
• Use only as intended; do not modify mower.

DANGER! Blade can cause severe injury. Always ensure mower is completely off and batteries removed before any inspection or maintenance.

Troubleshooting

Reset: Remove batteries for 30 seconds, then reinsert.

Service: For warranty service, contact DeWalt Customer Service at 1-800-433-9258 or visit www.dewalt.com.