Suspa is a world-renowned manufacturer of motion control solutions, specializing in gas springs, dampers, and lift systems. If you have ever opened a vehicle’s tailgate, adjusted an ergonomic office chair, or lifted a heavy storage lid on a piece of furniture, you have likely benefited from their technology. When these components begin to wear out, they can make everyday tasks difficult or even hazardous. Finding the correct replacement part is the first step toward restoring smooth and safe operation to your equipment.
Understanding Suspa Gas Springs and Dampers
Gas springs, often referred to as gas struts or lift supports, are energy storage devices. They use compressed nitrogen gas to provide a controlled force that helps lift, lower, and position heavy objects. Unlike mechanical coil springs, gas springs provide a smooth, dampened movement that prevents slamming and reduces the effort required by the user.
Dampers, on the other hand, are designed specifically to control or slow down motion. While a gas spring provides a lifting force, a damper absorbs energy to regulate the speed of a moving part. Suspa manufactures a wide variety of these components for automotive, industrial, and residential applications. Understanding the difference between these two is vital when looking for the right replacement part for your specific needs.
How to Identify Your Suspa Part Number
The most critical step in replacing a gas spring is identifying the specific model you currently have. Suspa products are engineered with precise specifications for force, length, and stroke. Using the wrong part can lead to a door that won’t stay open or one that is impossible to close. Fortunately, most Suspa parts have their identification information printed directly on the cylinder body.
Locating the Label
Look for a printed label or laser-etched text on the black or silver cylinder of the spring. This label typically contains the manufacturer’s name and a series of numbers. You are looking for a part number, which often follows a format like “16-1,” “16-2,” or a longer string of digits unique to that specific production run.
Understanding Force (Newtons)
One of the most important figures on the label is the force rating, usually followed by the letter “N,” which stands for Newtons. For example, a label might say “0400N.” This indicates the spring provides 400 Newtons of force. When ordering a replacement, you must match this number exactly. If the force is too low, the spring will not hold the weight; if it is too high, you may damage the mounting points or be unable to close the lid.
Measuring Length and Stroke
If the label is missing or illegible, you will need to take manual measurements. The two key dimensions are the “extended length” and the “stroke.” The extended length is measured from the center of one end fitting to the center of the other when the spring is fully open. The stroke is the distance the rod can actually move into the cylinder. Always measure in millimeters for the highest accuracy, as most Suspa specifications use the metric system.
Common Applications for Suspa Parts
Suspa components are used across a vast range of industries. Knowing where these parts are commonly found can help you understand what to look for when a replacement is needed. If a component in any of these categories starts to feel heavy or stiff, it is likely time for a new gas spring.
- Automotive: Liftgate supports, hood struts, and trunk stays for cars, SUVs, and trucks.
- Office Furniture: Height-adjustment mechanisms for chairs and sit-stand desks.
- Kitchen and Home: Soft-close hinges for cabinets and lift-up mechanisms for storage beds or heavy toolboxes.
- Medical Equipment: Adjustable hospital beds, monitor arms, and dental chairs.
- Industrial Machinery: Safety covers, access panels, and heavy-duty equipment lids.
Choosing the Right End Fittings
When you purchase a replacement Suspa part, you must also ensure the end fittings match your existing setup. The end fittings are the hardware pieces that connect the gas spring to the mounting brackets. If your new part does not come with the correct fittings, it will be impossible to install correctly.
Ball Joints and Sockets
The most common fitting is the ball socket, which snaps onto a ball stud mounted on the application. These are usually made of plastic or steel. Most Suspa springs use a standard 10mm ball stud, but it is always wise to verify the size before ordering. These fittings often feature a small metal clip that locks the socket onto the ball.
Clevis and Eyelets
In industrial or heavy-duty applications, you might see eyelets or clevis ends. These are flat pieces with a hole in the middle that a bolt or pin passes through. These provide a very secure connection but allow for less angular movement than a ball joint. If your current spring uses these, ensure the hole diameter matches your mounting hardware exactly.
How to Replace a Suspa Gas Spring: Step-by-Step
Replacing a gas spring is generally a simple DIY task that can be completed in under 15 minutes with basic tools. However, because these parts are under high pressure and often support heavy weights, safety must be your top priority.
Step 1: Secure the Load
Never attempt to remove a gas spring while it is supporting weight. If you are replacing a car’s tailgate strut, have a second person hold the door open or use a sturdy prop rod to secure it. If the door falls while the spring is removed, it can cause serious injury or damage.
Step 2: Remove the Old Spring
Most Suspa springs are held in place by a small metal retaining clip on the back of the ball socket. Use a flat-head screwdriver to gently pry the clip out just enough to release the tension. You do not need to remove the clip entirely. Once the clip is loosened, pull the socket away from the ball stud. Repeat this for the other end of the spring.
Step 3: Prepare the Mounting Studs
Before installing the new part, take a moment to wipe the mounting ball studs clean with a rag. If they appear dry or rusty, apply a small amount of lithium grease or a similar lubricant. This ensures the new spring can pivot smoothly without wearing down the socket.
Step 4: Install the New Spring
Position the new Suspa spring so the cylinder (the thicker part) is at the top. This orientation is important because it allows the internal oil to lubricate the seals, extending the life of the part. Simply align the socket with the ball stud and press firmly until it snaps into place. You usually do not need to move the retaining clip for installation; it should click automatically.
Step 5: Test the Operation
Once both ends are securely attached, carefully remove your prop rod or have your assistant release the door. Cycle the door or lid open and closed several times to ensure the movement is smooth and the spring is providing the correct amount of lift. Listen for any clicking or binding sounds that might indicate an alignment issue.
Maintenance Tips for Longevity
To get the most out of your new Suspa parts, follow a few simple maintenance guidelines. First, keep the thin inner rod clean. Dust, dirt, or paint on the rod can damage the internal seals as it slides into the cylinder, leading to gas leaks. Never use pliers or any tool that might scratch the rod.
Second, avoid using lubricants directly on the rod itself. Most gas springs are self-lubricating. Adding external oils can actually attract more dirt and grime, which shortens the lifespan of the unit. Finally, always replace gas springs in pairs. If one strut on your trunk has failed, the other is likely near the end of its life as well. Replacing both ensures balanced force and prevents the new spring from wearing out prematurely due to overwork.
Conclusion
Finding and replacing Suspa gas springs doesn’t have to be a complicated process. By identifying the part number, matching the force and dimensions, and following safe installation practices, you can easily restore the functionality of your vehicle, furniture, or machinery. Taking the time to select the correct replacement ensures that your equipment operates smoothly and safely for years to come. For more practical guides on home maintenance and part replacement, feel free to explore our other helpful articles.