DeWalt DCMWSP256U2 Lawn Mower Manual

The DeWalt DCMWSP256U2 is a 56V MAX* Brushless Cordless Self-Propelled Lawn Mower featuring a 21-inch steel deck, 2-in-1 mulching and rear bagging capability, 7-position single-lever height adjustment, brushless motor for extended runtime and durability, variable speed self-propulsion, LED headlights, and compatibility with DeWalt FLEXVOLT® 60V MAX* and 20V MAX* batteries (battery and charger sold separately). Below are key sections for safety, features, assembly, operation, maintenance, and troubleshooting.

1. Features at a Glance 2. Assembly & Setup 3. First-Time Operation 4. Specifications 5. Controls and Settings 6. Mowing Operations 7. Mulching & Bagging 8. Battery & Charging 9. Care & Maintenance 10. Safety Information 11. Troubleshooting

Features at a Glance

Key components: 21-inch steel cutting deck, Brushless motor, Variable speed self-propulsion drive, 7-position height adjustment lever, 2-in-1 mulching plug/rear bag, LED headlights, Battery port, Safety key.

Feature	Description
Cutting Deck	21-inch steel deck for efficient cutting width
Motor	Brushless motor for longer runtime and motor life
Self-Propulsion	Variable speed drive for easy handling on slopes and terrain
Height Adjustment	Single lever adjusts all four wheels to 7 positions (1.5" - 4")
2-in-1 Function	Mulch or bag clippings with included mulch plug and rear bag
LED Headlights	Illuminate work area in low-light conditions
Battery Compatibility	Works with DeWalt FLEXVOLT 60V MAX and 20V MAX batteries*
Safety Key	Removable key prevents accidental start-up
Folding Handle	For compact storage
Wheels	8-inch rear, 7-inch front wheels for maneuverability

Assembly & Setup

Unpack and inspect all parts. Assemble on a flat, stable surface.

Attach the Lower Handle: Secure to deck using provided bolts and wrench.
Attach the Upper Handle: Connect to lower handle, secure knobs.
Install the Bagging Assembly: Attach rear bag adapter and fabric bag to deck chute.
Install the Mulch Plug: For mulching, insert plug into rear discharge chute.
Attach the Wheels: Secure all four wheels with provided hardware.
Adjust Cutting Height: Set lever to desired position before first use.

WARNING! Ensure mower is powered OFF and battery is removed during assembly. Tighten all hardware securely.

First-Time Operation

Before first mow, ensure proper assembly and battery charge.

Insert Battery: Slide compatible DeWalt battery into battery port until it clicks.
Insert Safety Key: Push safety key fully into slot near handle.
Adjust Cutting Height: Use single lever to set height for your lawn condition.
Select Mode: Install mulch plug for mulching OR attach bag for collection.
Start Mower: Hold safety bail handle against upper handle, then pull start lever.
Engage Self-Propulsion: Press and hold drive control lever to desired speed.

CAUTION! Clear mowing area of debris, stones, and toys. Wear appropriate safety gear.

Specifications

Model: DCMWSP256U2
Cutting Width: 21 inches
Cutting Heights: 7 positions, 1.5" to 4"
Deck Material: Steel
Motor Type: Brushless
Drive System: Variable speed self-propelled (0-3.5 mph)
Battery System: 56V MAX* (Compatible with FLEXVOLT 60V MAX/20V MAX*)
Collection Capacity: 1.9 bushels (rear bag)
Wheels: 8" rear, 7" front
Features: 2-in-1 mulch/bag, LED headlights, folding handle
Weight (without battery): 65.9 lbs

Controls and Settings

Primary controls located on upper handle. Safety Bail Handle: Must be held against upper handle to operate mower. Start Lever: Pull to start blade rotation when safety bail is engaged. Drive Control Lever: Press and hold to engage self-propulsion; release to stop. Speed Dial: Adjusts maximum self-propulsion speed. Height Adjustment Lever: Single lever changes cutting height for all wheels. Battery Release Button: Press to remove battery. LED Light Switch: Turns headlights on/off.

Settings: Cutting Height (1.5", 2", 2.5", 3", 3.5", 4"). Operation Mode (Mulching with plug installed, Bagging with bag attached).

Mowing Operations

For optimal performance and lawn health.

Clear Area: Remove sticks, stones, and debris.
Plan Pattern: Mow in straight, overlapping passes. Change direction periodically.
Engage Self-Propulsion: Use on slopes or long stretches to reduce fatigue.
Adjust Speed: Use speed dial to match your walking pace and grass conditions.
Use Headlights: Switch on LED lights in early morning or evening.
Empty Bag: Do not allow bag to overfill; empty when bag full indicator is visible.

Tip: Mow when grass is dry for best cut and bagging performance. Never remove safety key while blade is moving.

Mulching & Bagging

2-in-1 system allows quick change between functions.

Mulching:

Ensure mulch plug is fully inserted into rear discharge chute.
Mow as normal. Clippings are finely cut and returned to lawn as nutrient-rich mulch.
Best for regular mowing when grass is not overly long or wet.

Bagging:

Remove mulch plug from chute.
Attach bag adapter and fabric bag securely.
Mow as normal. Clippings are collected in bag.
Empty bag when full indicator is visible or bag feels heavy.

WARNING! Always stop mower and remove battery before changing between mulch and bag modes.

Battery & Charging

Compatible with DeWalt FLEXVOLT 60V MAX and 20V MAX battery system*.

Charging: Use appropriate DeWalt charger for your battery. Charge in a dry, indoor location.
Inserting Battery: Slide battery into port until it clicks. Ensure it is fully seated.
Removing Battery: Press battery release button and slide battery out.
Runtime: Varies based on battery capacity, grass condition, and use of self-propulsion.
Storage: Store battery in a cool, dry place away from metal objects.

CAUTION! Use only genuine DeWalt batteries and chargers. Do not expose battery to fire or water.

Care & Maintenance

Regular maintenance ensures longevity and performance.

After Each Use: Clean underside of deck (with battery removed). Wipe down mower.
Blade Care: Periodically inspect blade for damage or dullness. Sharpen or replace as needed.
Wheel & Drive Check: Ensure wheels move freely and drive system is clean of debris.
Battery Contacts: Keep clean and dry.
Winter Storage: Clean thoroughly, remove battery, store in a dry place.

CAUTION! Always disconnect battery before performing any maintenance. Do not use water or pressure washer to clean mower.

Safety Information

Read and understand all instructions before use.

Wear appropriate protective equipment: safety glasses, hearing protection, long pants, and sturdy shoes.
Keep bystanders, especially children and pets, away from the mowing area.
Never operate mower without the safety key installed, or with damaged guards or shields.
Do not mow on steep slopes (over 15 degrees). Mow across slopes, not up and down.
Never lift or carry the mower while it is running.
Be aware of the mower discharge direction. Do not point it at people, animals, or windows.

Refer to the full safety section in the printed manual for complete details.

Troubleshooting

Symptom	Possible Cause	Corrective Action
Mower will not start	Safety key not inserted, battery dead/not seated, safety bail not engaged	Insert safety key, charge/seat battery properly, hold safety bail against handle.
Self-propulsion not working	Drive control lever not pressed, speed dial set to zero, drive system obstructed	Press lever fully, adjust speed dial, clear debris from wheels and drive.
Poor cutting performance	Dull blade, cutting height too low, wet grass, clogged deck	Sharpen/replace blade, raise cutting height, mow when dry, clean deck underside.
Bag not filling / Mulch poor	Deck clogged, grass too long/wet, wrong mode selected	Clean deck, mow more frequently/when dry, ensure correct plug/bag is installed.
Excessive vibration/noise	Damaged/unbalanced blade, foreign object in deck, loose hardware	Stop immediately! Remove battery, inspect blade and deck, tighten all hardware.
Battery drains quickly	Old battery, heavy grass, self-propulsion used extensively, extreme temps	Use fresh battery, mow more often, reduce propulsion speed, allow battery to cool/warm.

Service: For repairs, contact an authorized DeWalt service center or call 1-800-4-DeWalt (1-800-433-9258).