1. Introduction
This manual provides essential information for the safe and effective operation, maintenance, and troubleshooting of your HiKOKI DH28PCY Rotary Hammer. Please read this manual thoroughly before using the tool to ensure proper handling and to prevent accidents or damage.
2. Safety Instructions
Always observe basic safety precautions to reduce the risk of fire, electric shock, and personal injury. Keep this manual for future reference.
- Work Area Safety: Keep the work area clean and well-lit. Cluttered or dark areas invite accidents. Do not operate power tools in explosive atmospheres, such as in the presence of flammable liquids, gases, or dust.
- Electrical Safety: Power tool plugs must match the outlet. Never modify the plug in any way. Avoid body contact with earthed or grounded surfaces such as pipes, radiators, ranges, and refrigerators.
- Personal Safety: Always wear eye protection. Use hearing protection when operating the tool for extended periods. Dress properly; do not wear loose clothing or jewelry. Keep hair, clothing, and gloves away from moving parts.
- Tool Use and Care: Do not force the power tool. Use the correct power tool for your application. Disconnect the plug from the power source before making any adjustments, changing accessories, or storing power tools.
- Vibration: This tool features User Vibration Protection (UVP) to reduce vibration. However, prolonged use can still cause vibration-related injuries. Take regular breaks and use appropriate gloves.
3. Product Overview
The HiKOKI DH28PCY is a powerful 850-watt rotary hammer designed for efficient drilling and hammer drilling in various materials, including concrete, masonry, wood, and metal. It features a robust design and User Vibration Protection (UVP) for enhanced user comfort.
This image displays the HiKOKI DH28PCY Rotary Hammer. The tool is black and green, featuring a large spiral drill bit inserted into the chuck. A black side handle is attached below the main body, and a depth gauge extends from the front. The mode selector dial, marked with symbols for drilling, hammer drilling, and chiseling, is visible on the side, along with the 'UVP' (User Vibration Protection) branding.
Key Features:
- Powerful 850 watt motor for demanding applications.
- User Vibration Protection (UVP) for reduced fatigue.
- Multiple operating modes: Drilling, Hammer Drilling, and Chiseling.
- 28 mm drilling capacity in concrete.
- Corded electric power source for consistent performance.
4. Setup
4.1 Attaching the Side Handle
- Loosen the side handle by rotating it counter-clockwise.
- Slide the handle onto the front barrel of the rotary hammer.
- Adjust the handle to a comfortable and secure position.
- Tighten the handle by rotating it clockwise until it is firmly secured.
4.2 Inserting and Removing Drill Bits
- Inserting: Clean the shank of the drill bit. Pull back the chuck sleeve, insert the bit into the chuck until it clicks into place. Release the sleeve. Pull on the bit to ensure it is securely locked.
- Removing: Pull back the chuck sleeve firmly and pull the drill bit out.
4.3 Setting the Depth Gauge
- Insert the depth gauge into the hole on the side handle.
- Adjust the depth gauge to the desired drilling depth.
- Tighten the side handle to secure the depth gauge in position.
5. Operating Instructions
5.1 Selecting Operating Mode
The HiKOKI DH28PCY offers three operating modes, selected via the mode selector dial:
- Drilling (Rotation Only): For drilling in wood, metal, and plastics.
- Hammer Drilling (Rotation with Hammering): For drilling in concrete, brick, and masonry.
- Chiseling (Hammering Only): For light chiseling, chipping, or demolition work.
To change the mode, rotate the selector dial to the desired symbol. Ensure the tool is unplugged or switched off before changing modes.
5.2 Starting and Stopping the Tool
- Starting: Connect the tool to a suitable power supply. Press the trigger switch to start the tool.
- Stopping: Release the trigger switch to stop the tool.
5.3 Drilling Techniques
- Always hold the tool firmly with both hands.
- Apply steady, even pressure. Do not force the tool.
- For hammer drilling, allow the tool's hammering action to do the work.
- When drilling deep holes, periodically withdraw the bit to clear debris.
6. Maintenance
Regular maintenance ensures the longevity and safe operation of your HiKOKI DH28PCY Rotary Hammer.
- Cleaning: After each use, clean the tool with a soft, damp cloth. Do not use harsh chemicals or abrasive cleaners. Keep ventilation openings clear of dust and debris.
- Lubrication: The internal components are factory-lubricated. Refer to a qualified service center for any internal lubrication needs.
- Cord Inspection: Regularly inspect the power cord for damage. If damaged, have it replaced by a qualified technician.
- Storage: Store the tool in a dry, secure place, out of reach of children.
7. Troubleshooting
If you encounter issues with your rotary hammer, refer to the following common problems and solutions:
| Problem | Possible Cause | Solution |
|---|---|---|
| Tool does not start | No power supply; damaged cord; faulty switch | Check power connection; inspect cord; contact service center |
| Reduced drilling performance | Worn drill bit; incorrect mode selection; excessive pressure | Replace drill bit; select correct mode (e.g., hammer drilling for concrete); apply steady pressure |
| Excessive vibration | Loose accessory; internal issue | Ensure bit and handle are secure; if problem persists, contact service center |
| Overheating | Blocked ventilation; prolonged heavy use | Clear vents; allow tool to cool down; reduce load |
For problems not listed here or if solutions do not resolve the issue, please contact a qualified service technician.
8. Specifications
The following are the technical specifications for the HiKOKI DH28PCY Rotary Hammer:
- Model Number: DH28PCY
- Power: 850 watt
- Power Source: Corded Electric
- Voltage: 2.2E+2 Volts (AC)
- Drilling Capacity (Concrete/Metal/Wood): 28 mm
- Color: Grey / Green
- Manufacturer: HiKOKI
9. Warranty Information
This product is covered by the manufacturer's warranty. Please refer to the warranty card included with your purchase or visit the official HiKOKI website for detailed terms and conditions regarding warranty coverage, duration, and claims procedures. Keep your proof of purchase for warranty validation.
10. Customer Support
For technical assistance, spare parts, or service inquiries, please contact your local HiKOKI authorized service center or dealer. You can find contact information on the official HiKOKI website or through your product retailer.
Website: www.hikoki-powertools.com
