Replacing the gas strut inside a Seldén Rodkicker isn’t just routine maintenance—it’s key to keeping your boom properly supported and easily adjustable. Whether your strut has lost pressure or you're upgrading to a higher force rating, here’s a comprehensive guide to identify the correct gas strut and swap it out safely.
Identifying Your Gas Strut Model
Before anything else, you’ll need to confirm exactly which strut is installed. Here’s how:
1. Inspect the Rodkicker for Labels
- Most Seldén Rodkickers have an engraved model number (e.g., RK20, RK25, or RK30) near one of the end fittings.
- This model determines the internal gas strut specs.
- If present, check for a serial number or part code directly on the gas spring cylinder.
2. Measure the Boom and Rodkicker
If no label is visible, use these measurements:
- Boom section (height and width): helps match your boom profile to the correct Rodkicker size.
- Rodkicker overall length (extended and compressed).
- Boom foot length (“E” dimension): useful for matching with Seldén’s sizing chart.
Tools & Materials You’ll Need
| Tool | Purpose |
|---|---|
| Allen keys / hex wrenches | For end fittings and bolts |
| Flathead screwdriver | To help separate components |
| Tape measure / calipers | For accurate measurements |
| Safety gloves | Handling pressurized components |
| Replacement gas strut | Must match Rodkicker specs |
Step-by-Step: Removing and Replacing the Gas Strut
Step 1: Secure the Boom
- Use a topping lift or support line to take the load off the boom.
-
Lower the boom gently to a stable position.
Step 2: Detach Rodkicker
- Disconnect it from both the mast and boom ends.
- Remove bolts or pins from end fittings.
Step 3: Disassemble the Rodkicker
- Slide the outer tube apart carefully to reveal the internal mechanism.
- The gas strut will be inside the larger tube and may be clipped or screwed in.
Step 4: Remove the Old Strut
- Inspect the retaining system: some models use pins, others screws or threaded connections.
- Carefully extract the strut, watching for any residual pressure or leaking oil.
Step 5: Clean & Inspect
- Wipe down all components.
- Check for signs of wear, corrosion, or seal damage.
- Check the model number engraved on the strut.
Step 6: Install the New Gas Strut
- Insert it in the same orientation as the old one.
- Reattach retaining hardware.
- Reassemble the telescoping tubes and reconnect both ends to the rig.
Pro Tips
- Never try to refill a dead gas strut—they’re sealed units.
- Use only genuine Seldén-approved replacement parts.
- If unsure, contact us with your boom specs and Rodkicker serial number.
If you need to buy a replacement gas strut, please visit: