how to recharge gas struts

how to recharge gas struts

Gas struts, also known as gas springs or gas shocks, are often used in various applications, including automotive hoods, cabinets, and furniture. Over time, gas struts can lose their effectiveness and may need to be recharged or replaced. Here’s a general guide on how to recharge gas struts, although it’s essential to note that not all gas struts are designed to be recharged, and some may need to be replaced entirely.

Tools and Materials Needed:

  • Replacement seals and o-rings (if necessary)
  • Appropriate gas strut recharge kit (typically includes a valve, hydraulic fluid, and instructions)
  • Flathead screwdriver
  • Safety glasses and gloves


  1. Safety Precautions:
    • Put on safety glasses and gloves to protect your eyes and hands from hydraulic fluid.
  2. Identify the Gas Struts:
    • Locate the gas struts that you want to recharge. These are typically found on hoods, tailgates, cabinets, or any application where you need a controlled opening and closing.
  3. Release Pressure (if needed):
    • If the gas struts are under pressure and difficult to move, use a flathead screwdriver to gently depress the release valve or button on the strut. This will release any existing pressure in the strut. Be cautious while doing this, as it can release fluid.
  4. Remove the Gas Struts (if necessary):
    • Some gas struts may need to be removed from their mounting brackets for recharging. Follow the manufacturer’s instructions for removal, if applicable.
  5. Inspect for Damage:
    • Inspect the gas struts for damage, leaks, or signs of wear. If the struts are damaged or leaking, they may need to be replaced instead of recharged.
  6. Identify the Charging Valve:
    • Look for the charging valve on the gas strut. This is typically located at one end of the strut and may have a protective cap.
  7. Prepare the Recharge Kit:
    • If you have a gas strut recharge kit, prepare it by following the instructions included in the kit. This may involve attaching a hose or connector to the charging valve.
  8. Recharge the Struts:
    • Connect the recharge kit to the charging valve on the gas strut.
    • Follow the instructions in the recharge kit to add hydraulic fluid to the strut. This process typically involves injecting fluid into the strut under pressure. The goal is to restore the correct pressure inside the strut.
  9. Replace Seals and O-Rings (if needed):
    • If your gas struts have damaged seals or o-rings, replace them as per the manufacturer’s recommendations.
  10. Test the Struts:
    • After recharging, test the gas struts by operating the mechanism they support (e.g., opening and closing a cabinet or hood). Ensure that the struts provide the desired level of support and control.
  11. Reinstall the Struts (if removed):
    • If you removed the struts during the process, reinstall them onto their mounting brackets or hinges following the manufacturer’s instructions.
  12. Secure the Charging Valve (if applicable):
    • If your gas struts have a protective cap on the charging valve, make sure to secure it to protect the valve from dust and debris.

It’s important to note that not all gas struts can be successfully recharged, and attempting to recharge a damaged or excessively worn strut may not yield satisfactory results. If your gas struts continue to show signs of wear, leakage, or reduced performance after recharging, it may be best to replace them with new gas struts that are designed for your specific application. Always follow the manufacturer’s guidelines and safety precautions when working with gas struts.