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MAINTENANCE AND INSPECTION

WARNING: Be sure to switch power OFF and disconnect the plug from the receptacle during 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 a new one or resharpening without delay when abrasion is noted.

2.Inspecting the screws

Regularly inspect all screws and ensure that they are properly tightened. Should any of the screws be loosened, retighten them immediately.

WARNING: Using this rotary hammer with loosened screws is extremely dangerous.

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: (Fig. 20)

The motor employs carbon brushes which are consumable parts. When they become worn to or near “wear limit”, it could result in motor trouble. When an auto-stop carbon brush is equipped, the motor will stop automatically. At that time, replace both carbon brushes with new ones which have the same carbon brush Nos. shown in the figure.

In addition, always keep carbon brushes clean and ensure that they slide freely within the brush holders.

CAUTION: Using this rotary hammer with a carbon brush which is worn in excess of the wear limit will damage the motor.

Wear limit

No. of carbon brush

73

0.28" (7 mm)

0.67" (17 mm)

Fig. 20

NOTE: Use HITACHI carbon brush No.73 indicated in Fig. 20.

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Hitachi DH30PB Maintenance and Inspection, Inspecting the drill bits, Inspecting the screws, Maintenance of the motor
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DH30PC, DH30PB specifications

The Hitachi DH30PB and DH30PC are powerful tools designed to meet the rigorous demands of construction and renovation professionals. Both models are renowned for their performance, ergonomics, and advanced technology, making them ideal choices for a variety of drilling and chiseling applications.

One of the standout features of the DH30PB and DH30PC is their robust motor. Equipped with a high-performance 3.2-amp motor, these tools deliver exceptional drilling power, providing users with the capability to handle tough materials, including concrete, masonry, and more. This powerful motor ensures quick and efficient drilling, saving both time and energy on the job site.

The Hitachi DH30PB and DH30PC also incorporate advanced vibration-reduction technology. This feature minimizes the vibrations transferred to the user's hands during operation, significantly enhancing comfort and reducing fatigue. As a result, professionals can work for extended periods without discomfort, increasing productivity and job satisfaction.

Another impressive aspect of these models is their hammering mechanism. With a high-impact energy rating, the DH30PB and DH30PC offer fast and effective chiseling and hammer drilling capabilities. This versatility makes them suitable for a wide range of applications, from drilling holes for anchors to chiseling through tough surfaces.

In terms of design, both models are built for durability and ease of use. They feature a lightweight construction, making them easy to maneuver in tight spaces while maintaining strength and performance. The rubberized grip enhances comfort and control, ensuring a secure hold during operation.

Moreover, the DH30PB and DH30PC come equipped with a quick-change chuck, allowing for seamless bit changes without requiring additional tools. This feature increases efficiency and convenience on the job site, enabling professionals to switch between tasks effortlessly.

In conclusion, the Hitachi DH30PB and DH30PC models stand out in the crowded market of power tools due to their powerful motors, advanced vibration-reduction technology, and user-friendly design. These features, combined with their exceptional performance in challenging environments, make them reliable companions for professionals in construction, renovation, and various industrial applications. Whether drilling or chiseling, users can count on these tools to deliver results that meet and exceed expectations.
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