Which Way Do You Install Gas Struts?

The orientation of a gas strut during installation significantly impacts its performance and lifespan. While the general rule is to install with the rod (thinner, moving part) pointing downwards, there are exceptions and considerations for specific applications. Correct installation ensures proper lubrication and prevents premature failure. Understanding the rationale behind these guidelines is essential for both DIY enthusiasts and professionals.

Why Does Gas Strut Orientation Matter?

Gas struts contain pressurized gas and oil for lubrication. Installing them correctly ensures the oil lubricates the seals effectively. Here’s a breakdown:

Lubrication: When the rod points downwards, the oil naturally lubricates the seals as the strut cycles. This reduces friction and wear.
Seal Integrity: Proper lubrication maintains the seal’s integrity, preventing gas leakage and pressure loss over time. A dry seal will quickly degrade.
Performance Consistency: Correct orientation ensures consistent damping and extension force throughout the strut’s lifespan.
Longevity: Proper installation significantly extends the lifespan of the gas strut, saving you money on replacements.

General Rule: Rod Downwards

In most applications, the recommended orientation for gas strut installation is with the rod pointing downwards. This applies to:

Car Boot Struts: The struts that hold up your car’s boot or trunk lid should generally be installed with the rod down.
Hatchback Struts: Similar to boot struts, hatchback struts also benefit from this orientation.
Furniture Applications: For cabinet doors, storage beds, and other furniture applications, rod-down is usually the best choice.
General Industrial Use: in most industrial applications, rod down orientation is best.

When to Install Rod Upwards

There are specific scenarios where installing a gas strut with the rod pointing upwards is either necessary or advantageous:

Space Constraints: In some applications, physical space limitations may dictate an upward rod orientation. If the strut simply won’t fit any other way, you might have to compromise. Review physical dimensions and mounting options before making a decision.
Design Requirements: Rarely, a specific design may demand an upward rod installation. Always consult engineering schematics.

Considerations for Upward Rod Installation

If you must install a gas strut with the rod upwards, consider these factors to mitigate potential issues:

Regular Cycling: Frequent use can help distribute oil within the strut, providing some lubrication to the seals.
Grease Application: Some users carefully apply a small amount of compatible grease to the rod before installation to aid initial lubrication. Consult the manufacturer before applying any third-party lubricant.
Shorter Lifespan: Be aware that upward rod installation may reduce the strut’s lifespan. Plan for more frequent replacements.

How to Identify the Rod and Cylinder

It’s crucial to correctly identify the rod and cylinder of a gas strut. Here’s how:

The Rod: The rod is the thinner, chrome-plated, moving part of the strut. It extends and retracts as the strut operates.
The Cylinder: The cylinder is the larger, typically black or silver, body of the strut. It contains the pressurized gas and oil.

Step-by-Step Gas Strut Installation Guide

Follow these steps for a successful gas strut installation, assuming a rod-down orientation:

Gather Your Tools: You’ll typically need a screwdriver or socket set, depending on the type of end fittings. Safety glasses are also recommended.
Remove the Old Strut (If Applicable): Carefully detach the old strut. Note its orientation before removal. If you’re working on something heavy like a car boot, have a support in place to prevent it from falling.
Clean the Mounting Points: Wipe down the mounting points to remove any dirt or debris.
Attach the Cylinder End: Connect the cylinder end of the new gas strut to its corresponding mounting point. Ensure the fitting is secure.
Compress the Strut (If Necessary): Some struts may require slight compression to align the rod end with its mounting point. Use gentle, controlled force.
Attach the Rod End: Secure the rod end to its mounting point. Double-check that all fittings are properly attached.
Test the Operation: Slowly move the application (e.g., car boot, cabinet door) through its range of motion to ensure smooth operation.

Common Mistakes to Avoid

Here are some common gas strut installation mistakes to avoid:

Forcing the Strut: Never use excessive force to compress or extend a gas strut. This can damage the internal components.
Incorrect End Fittings: Ensure you’re using the correct end fittings for your application. Using the wrong fittings can compromise safety and performance. Refer to the Gas Strut End Fittings Guide for more details.
Ignoring Orientation: As discussed, proper orientation is crucial. Don’t disregard the recommended rod-down (or rod-up, in specific cases) guideline.
Contaminating the Rod: Avoid touching the rod with dirty hands or tools. Contamination can damage the seals.
Using Damaged Struts: Never install a gas strut that shows signs of damage, such as dents, leaks, or bent rods.

What Size Strut Does My Application Need?

Choosing the correct size gas strut is essential for optimal performance and safety. The size needed depends on several factors, including weight of the lid or panel, the angle of opening, and the mounting location. Refer to our Gas Spring Force Calculator to determine the correct force for your setup.

Safety Precautions

Always prioritize safety when working with gas struts:

Wear Safety Glasses: Protect your eyes from potential debris.
Support Heavy Loads: When replacing struts on heavy applications like car boots, use a prop to prevent the load from falling.
Do Not Disassemble: Never attempt to disassemble a gas strut. They contain pressurized gas and can be dangerous.
Dispose of Properly: Dispose of old gas struts responsibly. Check with your local recycling center for disposal guidelines.

Troubleshooting Common Issues

Even with correct installation, you might encounter some issues:

Strut is Too Strong: If the strut is too strong, it will be difficult to close the application. This typically means that a strut with lower Newton force is required.
Strut is Too Weak: If the strut is too weak, it won’t hold the application open. This typically means that a strut with higher Newton force is required. For more, read our guide on Gas Strut Too Weak guides.
Strut Makes Noise: Unusual noises can indicate a problem with the strut. Inspect the rod and seals for damage.
Strut Fails Quickly: Premature failure can be caused by incorrect installation, excessive use, or exposure to extreme temperatures.

Gas Strut Brands Compared

Many gas strut manufacturers exist, each offering different price points and quality. Amongst the most popular are Stabilus, Sachs, Monroe, and Meyle. Always check user reviews and ratings before buying to gauge customer satisfaction. For more information, read our article on Gas Strut Brands Compared.

Where to Buy Gas Struts

Gas struts are available from various online retailers and automotive parts stores. Consider purchasing from reputable brands for guaranteed quality and performance. Check fitment guides and product dimensions before ordering. Our WooCommerce product pages offer direct replacements. Check fitment before ordering.

For bespoke or bulk orders, contact our industrial team

Which Way Do You Install Gas Struts?