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MAINTENANCE AND INSPECTION

1.Inspecting the drill bits

Since use of a dull tool will cause motor malfunctioning and degraded efficiency, replace the drill bit with new ones or resharpen them without delay when abrasion is noted.

2.Inspecting the mounting screws

Regularly inspect all mounting screws and ensure that they are properly tightened. Should any of the screws be loose, retighten them immediately. Failure to do so could result in serious hazard.

3.Maintenance of the motor

The motor unit winding is the very ”heart” of the power tool. Exercise due care to ensure the winding does not become damaged and/or wet with oil or water.

4.Inspecting the carbon brushes

For your continued safety and electrical shock protection, carbon brush inspection and replacement on this tool should ONLY be performed by a HITACHI Authorized Service Center.

5.Replacing supply cord

If the supply cord of Tool is damaged, the Tool must be returned to Hitachi Authorized Service Center for the cord to be replaced.

6.Service parts list

A:Item No.

B:Code No.

C:No. Used

D:Remarks

CAUTION

Repair, modification and inspection of Hitachi Power Tools must be carried out by an Hitachi Authorized Service Center.

This Parts List will be helpful if presented with the tool to the Hitachi authorized Service Center when requesting repair or other maintenance.

In the operation and maintenance of power tools, the safety regulations and standards prescribed in each country must be observed.

MODIFICATION

Hitachi Power Tools are constantly being improved and modified to incorporate the latest technological advancements.

Accordingly, some parts (i.e. code numbers and/or design) may be changed without prior notice.

NOTE:

Due to HITACHI’s continuing program of research and development, the specifications herein are subject to change without prior notice.

IMPORTANT:

Correct connection of the plug

The wires of the mains lead are coloured in accordance with the following code:

Blue: -Neutral

Brown: -Live

As the colours of the wires in the mains lead of this tool may not correspond with the coloured markings identifying the terminals in your plug proceed as follows: The wire coloured blue must be connected to the terminal marked with the letter N or coloured black. The wire coloured brown must be connected to the terminal marked with the letter L or coloured red. Neither core must be connected to the earth terminal.

NOTE:

This requirement is provided according to BRITISH STANDARD 2769: 1984.

Therefore, the letter code and colour code may not be applicable to other markets except The United Kingdom.

Information concerning airborne noise and vibration The measured values were determined according to EN60745 and declared in accordance with ISO 4871.

The typical A-weighted sound pressure level: 88 dB (A).

The typical A-weighted sound power level: 99 dB (A).

Uncertainty KpA: 3 dB (A).

Wear ear protection.

The typical weighted root mean square acceleration value: 10.8 m/s2.

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Hitachi Koki USA DH 22PB manual Maintenance and Inspection, Modification
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DH 22PB specifications

The Hitachi Koki USA DH 22PB is a powerful and versatile rotary hammer drill designed for both professional and DIY users. Known for its exceptional performance and durability, this tool is ideal for a wide range of applications, including drilling into concrete, masonry, and other tough materials.

One of the standout features of the DH 22PB is its advanced motor, which delivers an impressive horsepower output. This ensures efficient drilling operations and allows users to tackle even the toughest jobs without encountering significant slowdowns. The tool’s two-mode operation enables users to easily switch between rotary-only and hammering modes, providing added flexibility for various tasks.

The DH 22PB is equipped with a lightweight design, making it easy to handle and reducing user fatigue during extended use. Its ergonomic grip offers excellent comfort and control, allowing for precision in drilling and hammering applications. Additionally, the tool's compact design makes it easier to access tight spaces, further enhancing its versatility on the job site.

This rotary hammer also features an integrated shock-absorption system, which significantly reduces vibrations. This not only enhances user comfort but also helps extend the life of the tool by minimizing wear and tear. The DH 22PB is also designed with a side handle that can be easily adjusted for better control, ensuring increased stability during operation.

Another impressive characteristic of the DH 22PB is its durable construction. Built with high-quality materials, this tool is designed to withstand the rigors of heavy-duty usage. The durable chuck ensures that bits stay securely in place, while the overall design is resistant to dust and debris, thus enhancing the tool's longevity.

In terms of performance, the DH 22PB is efficient with its impressive impact rate, providing high-power blows that facilitate faster drilling processes. The tool's compatibility with various drill bits further extends its usability, making it an excellent choice for anyone in need of a reliable rotary hammer drill.

In conclusion, the Hitachi Koki USA DH 22PB combines power, versatility, and comfort in a compact package. Whether for professional construction projects or home improvement tasks, its advanced features and robust design make it a top choice among rotary hammer drills on the market.
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