Makita Cordless Concrete Vibrator

Specifications

Intended Use

The tool is intended for removing bubbles from concrete when casting concrete.

Safety Warnings

General Power Tool Safety Warnings

• WARNING: Read all safety warnings and all instructions. Failure to follow the warnings and instructions may result in electric shock, fire and/or serious injury.
• Save all warnings and instructions for future reference.

Cordless Concrete Vibrator Safety Warnings

• Always keep your hands and face away from vibrating head when operating.
• Switch off the tool immediately if you notice abnormal noise or something faulty during operation.
• Inspect the tool carefully for breakage, cracks or deformation if you accidentally drop it or strike it against something.
• Do not carry the tool with finger on switch.
• Do not set the tool down and switch it on. The vibrating head may whip around out of control and cause an accident.
• Be careful not to allow water, wet concrete or the like to get into the tool. Do not let the tool fall into wet concrete.

Important Safety Instructions for Battery Cartridge

• Before using battery cartridge, read all instructions and cautionary markings on (1) battery charger, (2) battery, and (3) product using battery.
• Do not disassemble battery cartridge.
• If operating time has become excessively shorter, stop operating immediately. It may result in a risk of overheating, possible burns and even an explosion.
• If electrolyte gets into your eyes, rinse them out with clear water and seek medical attention right away. It may result in loss of your eyesight.

Functional Description

Installing or Removing Battery (Fig. 1 & 2)

Diagrams illustrate the process of installing and removing the battery cartridge. This involves opening the battery cartridge cover by pressing a recessed part and pivoting it, then sliding a button on the battery while withdrawing it. To install, align the battery's tongue with the housing's groove and slide it in until it clicks. Ensure the red part of the button is not visible, indicating a secure lock. Do not force the battery; if it doesn't slide easily, it's not inserted correctly.

Battery Capacity Indicator (Fig. 3)

The battery capacity indicator shows remaining charge via indicator lamps. Pressing the check button illuminates the lamps. Four lamps indicate capacity: 75-100% (all lit), 50-75% (three lit), 25-50% (two lit), 0-25% (one lit). If no lamps light up or a specific pattern appears, the battery may need charging or could be malfunctioning.

Switch Action (Fig. 4)

Illustrates the switch lever on the tool. It shows the lever being pulled to start the tool and released to stop it, returning to the "OFF" position. The lever can be operated from the top or back of the tool.

Operation

Hold the tool straight when inserting/operating. Use the tool within the effective vibration range at equidistant intervals. The effective air bubble removal range is about ten times the diameter of the vibrating head, or around 250 mm.

Do not use this tool to move concrete within a form. The mortar will just move away and the coarse aggregate will remain, causing segregation. (Fig. 5)

Effective Leveling and Removal of Air Bubbles

Removal of the air bubbles is complete after you have worked the tool throughout each effective range, the concrete stops shrinking, and the mortar has risen evenly to the surface, giving off a light appearance. Gently remove the operating tool not to leave holes.

NOTE: Vibrating too long in a single place causes concrete segregation. If the coarse aggregate segregates when placing concrete, shovel out the coarse aggregate and put it where there is plenty of mortar. Then use the tool on it. Don't leave coarse aggregate in the segregated condition.

Concreting on a Slope: Always pour from the bottom at the beginning. This way the weight of the freshly poured concrete and vibration will lead to effective removal of air bubbles. Conversely, if the pouring is done first from above, the mortar will separate and eventually slide to the bottom. (Fig. 6)

Maintenance

CAUTION: Always be sure that the tool is switched off and the battery cartridge is removed before attempting to perform inspection or maintenance. Never use gasoline, benzine, thinner, alcohol or the like. Discoloration, deformation or cracks may result. To maintain product SAFETY and RELIABILITY, repairs, any other maintenance or adjustment should be performed by Makita Authorized Service Centers, always using Makita replacement parts.

Optional Accessories

These accessories or attachments are recommended for use with your Makita tool specified in this manual. The use of any other accessories or attachments might present a risk of injury to persons. Only use accessory or attachment for its stated purpose. Contact your local Makita Service Center for more details.

Makita genuine battery and charger.

Technical Data

Noise

The typical A-weighted noise level determined according to EN60745:

• Model DVR350: Sound pressure level (LpA): 74 dB (A), Uncertainty (K): 3 dB (A). The noise level under working may exceed 80 dB (A).
• Model DVR450, DVR850: Sound pressure level (LpA): 70 dB (A) or less, Uncertainty (K): 3 dB (A). The noise level under working may exceed 80 dB (A).

Wear ear protection ?.

Vibration

The vibration total value (tri-axial vector sum) determined according to EN60745:

• Model DVR350: Work mode: operation without load. Vibration emission (ah): 3.0 m/s², Uncertainty (K): 1.5 m/s².
• Model DVR450, DVR850: Work mode: operation without load. Vibration emission (ah): 2.5 m/s² or less, Uncertainty (K): 1.5 m/s².

The declared vibration emission value has been measured in accordance with the standard test method and may be used for comparing one tool with another. It may also be used in a preliminary assessment of exposure. WARNING: Vibration emission during actual use may differ from the declared value depending on usage. Identify safety measures based on exposure estimation.

EC Declaration of Conformity

For European countries only. The EC declaration of conformity is included as Annex A to this instruction manual.

Symbols

• Read instruction manual ?
• Do not use the tool in the rain ☔
• Do not clean the tool with water ?