Servicing Your Monarch Plus RC3 Rear Shock: Tools and Tips

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The RockShox Monarch Plus RC3 rear shock is a high-performance shock designed for all-mountain and enduro riders. It offers superior performance and adjustability, allowing riders to fine-tune their ride to match terrain and riding style. Regular maintenance of this shock ensures that it continues to perform at its best, maintaining optimal performance and longevity.

Tools Required

Before you begin servicing your Monarch Plus RC3, gather the following tools to ensure the job is completed smoothly:

  • 8mm hex wrench
  • 10mm socket wrench
  • Torque wrench [paid link]
  • Shock pump
  • Bleed kit [paid link] (RockShox)
  • Suspension fluid (RockShox recommended)
  • Allen wrench [paid link] set
  • Cleaning supplies (rags, degreaser)
  • Schrader valve tool
  • O-ring pick
  • Fresh seals and dust wipers (if necessary)

Understanding the Monarch Plus RC3 Rear Shock

The Monarch Plus RC3 is a dual-position rear shock with external compression and rebound adjustments. The RC3 model includes RockShox’s Rapid Recovery technology, which improves small bump sensitivity while keeping the suspension ready for bigger impacts. The three-position compression damper adjusts from Open, Pedal, and Lock, allowing riders to fine-tune their ride based on conditions.

Servicing the Monarch Plus RC3

1. Removing the Rear Shock

To start servicing the Monarch Plus RC3, remove the shock from the frame.

  • Use an 8mm hex wrench to remove the bolts securing the shock to the frame.
  • Be sure to support the bike properly to avoid damaging the shock or the frame during removal.
  • Once the shock is free, take extra care to keep it clean and free from debris.

2. Cleaning the Shock

Cleaning the shock is essential for removing dirt and grime that could affect performance.

  • Use a rag and degreaser to wipe down the shock, paying close attention to the bushings, seals, and external parts.
  • Clean the air sleeve thoroughly, ensuring no dirt is trapped in the moving parts.
  • If the shock has been exposed to mud or heavy debris, use a soft brush to reach hard-to-clean areas.

3. Rebuilding the Shock

After cleaning, you can begin rebuilding the shock. This process involves replacing worn seals, adding fresh suspension fluid, and inspecting the internal components.

  • Start by removing the air can (the outer sleeve) from the shock body.
  • Use a 10mm socket wrench to remove the nut securing the air can to the shock.
  • Once the nut is removed, carefully slide the air can off the shock body. Be cautious not to damage any parts.
  • Remove the old seals and replace them with fresh ones to ensure the shock is properly sealed and can retain pressure.
  • Inspect the shock’s internal components for wear. If necessary, replace any worn bushings or parts that affect the shock’s performance.

4. Adding Suspension Fluid

Proper suspension fluid levels are crucial for the Monarch Plus RC3 to function smoothly.

  • With the air can removed, pour fresh suspension fluid into the shock according to the manufacturer’s specifications.
  • Use a clean syringe to fill the shock with the correct amount of fluid, avoiding overfilling.
  • Be sure to use RockShox recommended fluids for optimal performance.

5. Reassembly

Once all parts are cleaned and lubricated, reassemble the shock.

  • Slide the air can back onto the shock body.
  • Tighten the nut using a 10mm socket wrench, ensuring the shock is securely assembled.
  • Reinstall the shock on the bike frame, ensuring the mounting bolts are torqued to the manufacturer’s specifications (usually around 30-35 Nm).

6. Setting the Air Pressure

Once the shock is reinstalled, set the correct air pressure.

  • Use a shock pump to adjust the air pressure based on your body weight and riding style. The Monarch Plus RC3 should be set to the manufacturer-recommended air pressure.
  • You may need to fine-tune the pressure based on the terrain or your preferences, but it’s essential to start with the baseline recommended pressure for optimal performance.

7. Rebounding and Compression Adjustments

The Monarch Plus RC3 features external rebound and compression adjustments. After servicing, adjust these settings to suit your riding conditions:

  • Rebound: Adjust the rebound knob to control how fast the shock returns after compression. Turn it clockwise to slow the rebound, or counterclockwise to speed it up.
  • Compression: Use the compression dial to adjust the shock’s response to bumps and impacts. The three positions are:
    • Open for maximum sensitivity and small bump compliance.
    • Pedal for a firmer feel to reduce pedal bob.
    • Lock for full compression, ideal for climbing or when a stiff suspension is needed.

8. Checking for Leaks

After reassembling and adjusting the shock, check for air or fluid leaks.

  • Use the Schrader valve tool to check the shock’s air chamber for leaks.
  • If any leaks are detected, recheck the seal installation and ensure everything is tightened properly.

Troubleshooting Common Setup Issues

Despite regular maintenance, riders may face some common setup issues with the Monarch Plus RC3. Here are some troubleshooting tips to resolve these problems:

  • Lack of Small Bump Sensitivity: This could be due to low suspension fluid or an incorrect air pressure setting. Recheck the fluid levels and adjust the air pressure accordingly.
  • Shock Bottoming Out: If the shock is bottoming out frequently, it may be due to excessive air pressure, improper rebound settings, or lack of fluid. Ensure the correct air pressure and rebound damping are set.
  • Excessive Sag: If there is too much sag, increase the air pressure in the shock. Sag is critical for maintaining proper suspension function, so it’s essential to get it right.
  • No Compression or Rebound Adjustment: If the adjustment knobs are not changing the shock’s performance, the internal damper may need to be serviced or replaced.

Customization and Optimization for Better Performance

To maximize the performance of your Monarch Plus RC3 rear shock, consider the following customization tips:

  • Tune Compression Settings for Terrain: If you ride a mix of terrain, adjust the compression setting to “Pedal” for climbing and “Open” for downhill or technical descents.
  • Use the Right Air Pressure: Proper air pressure is key to maintaining good performance. Ensure your air pressure is suitable for your body weight and riding style. Experiment with small adjustments to find the ideal setting.
  • Upgrade Bushings and Seals: If you’re looking for smoother performance, upgrade the bushings and seals to higher-end options for reduced friction and better responsiveness.

Compatibility with Other Drivetrain Components

The Monarch Plus RC3 is compatible with a wide range of mountain bike frames, especially those designed for all-mountain or enduro riding. When selecting a compatible frame, ensure the shock’s eye-to-eye length and stroke match the specifications of your frame. Additionally, while the shock can be used with most common drivetrain setups, some frame designs may affect the shock’s performance due to the angle of attachment or suspension design. Always check the frame’s compatibility before purchasing a replacement shock.

By maintaining and servicing your RockShox Monarch Plus RC3, you can ensure it continues to provide excellent performance, whether you’re tackling steep climbs or shredding technical descents. Regular upkeep, combined with thoughtful adjustments and customizations, can significantly enhance your riding experience.