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◯Replacing carbon brushes: (For parts name, refer to Fig. 1)

Loosen the two set screws and remove the tail cover. Remove the brush caps and carbon brushes. After replacing the carbon brushes, tighten the brush caps

securely and to install the tail cover with securely tightening two set screws.

5.How to replase grease

This machine is full air-tight construction to protect against dust and to prevent

lubricant leakage. Therefore, the machine can be used without lubrication for long periods. Replace the grease as described below.

◯Grease replacement period

You should look at the grease when you change the carbon brush. (See item 4 in the section MAINTENANCE AND INSPECTION.) Ask for grease replacement at the nearest HITACHI Authorized Service Center. Proceed for replacement of grease.

◯Grease replenishment

CAUTION: Before replenishing the grease, turn the power off and pull out the power plug.

(1)Disassemble the crank cover and thoroughly wipe off the old grease inside. (FIg. 21)

(2)Supply 30g (the standard volume to cover the connecting rod) of Hitachi Electric Hammer Grease A in the crank case.

(3)After replacing the grease, reassemble the crank cover securely. At this time, do not damage or lose the oil seal.

NOTE: The HITACHI Electric Hammer Grease A is of the lower viscosity type. When the supplied grease tube is consumed, purchase from a HITACHI Autorized Service Center.

Crank Case Cover

Fig. 21

6.Service and repairs

All quality power tools will eventually require servicing or replacement of parts because of wear from normal use. To assure that only authorized replacement parts will be used, all service and repairs must be performed by a HITACHI AUTHORIZED SERVICE CENTER, ONLY.

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Hitachi DH30PC, DH30PB instruction manual How to replase grease, Service and repairs
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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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