1. Introduction
This manual provides comprehensive instructions for the safe installation, proper operation, and essential maintenance of the Hafele 120N Hydraulic Shock Absorber. Designed for various furniture applications such as cabinet doors, trunks, and piano frames, this gas piston ensures smooth, silent operation and reliable support for lifting mechanisms.
Safety Information:
- Always read and fully understand these instructions before attempting installation or operation.
- Wear appropriate personal protective equipment, such as safety glasses, during installation.
- Ensure all mounting points are secure to prevent injury or damage.
- Keep the product and tools out of reach of children.
2. Product Overview and Components
The Hafele 120N Hydraulic Shock Absorber is a gas spring designed to assist in lifting and holding open cabinet doors and lids. It features a silent operation and a soft-close mechanism, providing convenient access to cabinet contents. The unit includes pre-assembled screw-fixing brackets for easy mounting.
Figure 1: A single Hafele 120N hydraulic shock absorber, showing its grey body and mounting ends.
Figure 2: Four Hafele 120N hydraulic shock absorbers packaged together, showing the product label.
3. Specifications
- Model Number: 373.82.909
- Pressure: 120N (27 lbf) / 12 KG
- Full Extended Length: 268 mm
- Closed Length: 178 mm
- Recommended Door Weight: 1.6 kg to 4.1 kg (per shock absorber)
- Item Weight: 1.14 pounds (for the pack)
- Package Dimensions: 12.68 x 3.82 x 2.56 inches
- Compatibility: Suitable for all types of wooden and aluminum frame doors.
4. Installation
Proper installation is crucial for the optimal performance and longevity of your Hafele Hydraulic Shock Absorber. Refer to the detailed diagram below for precise measurements and mounting instructions based on your desired door opening angle.
Figure 3: Hafele Hydraulic Shock Absorber Installation Diagram. This diagram illustrates the various models, mounting dimensions for different opening angles (75°, 90°, 110°), and a table for determining the required number of shock absorbers based on door weight and opening angle.
Figure 4: A detailed view of the mounting bracket and end of the Hafele hydraulic shock absorber, illustrating the attachment mechanism.
Installation Steps:
- Determine Door Weight and Opening Angle: Measure the weight of your cabinet door or lid. Decide on the desired opening angle (75°, 90°, or 110°). Refer to the table in Figure 3 to select the appropriate shock absorber strength (N-value) and quantity for your door weight and angle. For model 373.82.909, the pressure is 120N.
- Mark Mounting Positions: Using the dimensions provided in Figure 3 (A, B, C, X, Y, Z), accurately mark the drilling points on both the cabinet frame and the door. The diagram shows specific measurements for 75°, 90°, and 110° opening angles.
- Attach Mounting Brackets: Securely fasten the pre-assembled screw-fixing brackets to the marked positions on the cabinet and door using appropriate screws (not included). Ensure they are firmly attached and aligned correctly.
- Clip Shock Absorber: Once the brackets are in place, simply clip the hydraulic shock absorber onto the brackets. No additional tools are required for this step. Ensure both ends are securely attached.
- Test Operation: Gently open and close the door to verify smooth operation and that the shock absorber holds the door in the desired open position. Adjust if necessary.
5. Operation
The Hafele Hydraulic Shock Absorber provides an automatic opening system, assisting in the effortless lifting of cabinet doors. When the door is lifted, the gas piston extends to support its weight, holding it open securely. The soft-close mechanism ensures a gentle and controlled closing motion, preventing slamming and reducing wear on the cabinet and hinges.
To operate, simply lift the cabinet door. The shock absorber will engage, providing assistance and holding the door in the open position. To close, gently pull the door down; the shock absorber will retract smoothly.
6. Maintenance
To ensure the long-term performance and reliability of your hydraulic shock absorber, follow these simple maintenance guidelines:
- Regular Inspection: Periodically check all mounting screws and brackets to ensure they remain tight and secure. Loose fittings can affect performance and lead to premature wear.
- Cleanliness: Keep the piston rod clean and free from dust, dirt, or debris. Wipe it gently with a soft, dry cloth if necessary. Avoid using abrasive cleaners or solvents.
- Lubrication: Do not attempt to lubricate the piston rod or any internal components. The unit is factory-sealed and designed for maintenance-free operation.
- Damage Check: Inspect the shock absorber for any signs of physical damage, bending, or oil leakage. If damage is observed, replace the unit immediately.
7. Troubleshooting
If you encounter issues with your Hafele Hydraulic Shock Absorber, consider the following troubleshooting steps:
- Door Not Staying Open / Weak Support:
- Verify that the correct N-value shock absorber has been installed for your door's weight and size. An undersized unit will not provide adequate support.
- Check if the mounting brackets are securely fastened and correctly aligned according to the installation diagram.
- Inspect the shock absorber for any signs of oil leakage or physical damage, which may indicate a loss of pressure. If leakage is present, the unit needs replacement.
- Door Not Closing Smoothly / Excessive Resistance:
- Ensure the shock absorber is not oversized for the door's weight, which can cause excessive resistance.
- Check for any obstructions or misalignment in the door's path or hinges.
- Noise During Operation:
- Ensure all mounting screws are tight. Loose connections can cause rattling.
- Verify that the shock absorber is not rubbing against any part of the cabinet or door.
8. Warranty and Support
Hafele products are manufactured to high-quality standards. For specific warranty information regarding your 120N Hydraulic Shock Absorber, please refer to the documentation provided at the time of purchase or visit the official Hafele website.
If you require further assistance, have questions about installation, or need to report a product defect, please contact Hafele customer service or your authorized Hafele dealer. Provide your product model number (373.82.909) and details of your issue for efficient support.
You can find contact information on the official Hafele website: www.hafele.com
