Makita DUS158Z 18V LXT Cordless 15 L Backpack Sprayer Instruction Manual

1. Product Overview

The Makita DUS158Z 18V LXT Lithium-Ion Cordless 15 L Backpack Sprayer is designed for efficient application of pesticides, insecticides, herbicides, fungicides, and fertilizers. This tool-only model offers cordless convenience and consistent pressure for various gardening and lawn care tasks.

Figure 1: Front view of the Makita DUS158Z 15 L Backpack Sprayer, showing the translucent tank and spray wand.

Key Features:

• Power: Delivers consistent pressure up to 73 PSI (0.5 Mpa).
• Reach: 67" (1.7 m) hose length and 23-5/8" (0.6 m) spray wand length.
• Convenience: Battery fuel gauge with 3 LED indicators. Easy battery removal with spring-loaded assist. Large paddle switch with lock-on button for continuous spraying.
• Durability: eXtreme Protection Technology (XPT) offers maximum protection against dust, debris, and liquids for optimal performance in extreme conditions.
• Tank Capacity: 15 Liters (approximately 4 Gallons).

2. Safety Information

Always prioritize safety when operating the backpack sprayer. Failure to follow these guidelines may result in injury or damage to the equipment.

• Wear appropriate personal protective equipment (PPE), including protective clothing, gloves, and eye protection, especially when handling chemicals.
• Avoid direct skin or eye contact with chemicals. In case of contact, follow the chemical manufacturer's first aid instructions.
• Ensure proper assembly and maintenance to prevent accidents.
• Do not use damaged batteries or chargers.
• Keep children and pets away from the work area.
• Store chemicals and the sprayer in a secure, well-ventilated area, out of reach of children.

3. Setup

3.1. Attach Shoulder Harness

The adjustable ergonomic harness provides comfortable portability. Attach the padded shoulder straps to the designated points on the sprayer tank.

Figure 2: Rear view of the sprayer showing the padded shoulder harness attached for comfortable carrying.

3.2. Assemble Spray Wand and Hose

Connect the 67-inch (1.7 m) hose to the sprayer's outlet. Then, attach the telescoping spray wand to the hose. The wand extends up to 23-5/8 inches (0.6 m) for extended reach.

Figure 3: Close-up of the spray wand handle, featuring the trigger and lock-on button for continuous operation.

3.3. Install Battery

The DUS158Z is a tool-only model and requires an 18V LXT Lithium-Ion battery (sold separately). Open the battery compartment, insert a charged battery, and secure the cover.

Figure 4: The battery compartment located on the side of the sprayer, designed for easy access and battery insertion.

Figure 5: A hand inserting an 18V LXT battery into the designated compartment of the backpack sprayer.

4. Operating Instructions

4.1. Filling the Tank

Unscrew the tank cap and use the included measuring cup to accurately mix your desired solution. The translucent tank allows for quick checking of liquid levels. Do not overfill.

Figure 6: The included measuring cup, essential for accurate mixing of solutions before filling the sprayer tank.

4.2. Adjusting Nozzles and Pressure

The sprayer features selectable dual head spray nozzle or herbicide weed killer nozzle. Adjust the nozzle to achieve the desired spray pattern (mist or stream). The motor delivers immediate and consistent pressure up to 73 PSI.

4.3. Spraying

Once the tank is filled and the battery is installed, put on the backpack sprayer. Activate the large paddle switch with the lock-on button for continuous operation. Direct the spray wand towards the target area, maintaining a consistent distance for even coverage.

Figure 7: A user operating the Makita DUS158Z backpack sprayer, applying solution to garden bushes.

4.4. Battery Fuel Gauge

Monitor the 3-stage L.E.D. gauge to check the battery charging level during operation.

Figure 8: A detailed view of the 3-stage LED battery fuel gauge, indicating the remaining battery charge.

5. Maintenance

Regular maintenance ensures optimal performance and extends the life of your sprayer.

• Cleaning: After each use, thoroughly rinse the tank, hose, and wand with clean water. Operate the sprayer with clean water to flush out any chemical residue.
• Nozzle Care: Clean nozzles regularly to prevent clogging. Disassemble and rinse with water.
• Battery Care: Store batteries in a cool, dry place. Charge batteries fully before storage and periodically during long storage periods to maintain battery health.
• Storage: Store the sprayer in a dry, protected area, away from direct sunlight and extreme temperatures. The wand stores on the sprayer for convenient transportation.

6. Troubleshooting

If you encounter issues with your sprayer, refer to the following common troubleshooting steps:

7. Specifications

8. Official Product Video

9. Warranty and Support

The Makita DUS158Z Backpack Sprayer comes with a 3-Year Limited Manufacturer Warranty. For warranty claims, technical support, or service inquiries, please refer to the contact information provided in your product packaging or visit the official Makita website.