The Mara Inline Trunnion [paid link] shock from Manitou is a high-performance rear shock designed for mountain bikers seeking precise control and comfort. Performing regular maintenance, such as an oil change, is critical to ensuring optimal performance and longevity. In this guide, we will walk you through the process of changing the oil in your Mara Inline Trunnion [paid link] shock, covering everything from necessary tools to troubleshooting tips.

Tools Required

Before beginning the oil change, gather the following tools:

• 5mm Allen wrench [paid link]
• 10mm socket wrench
• Torque wrench [paid link]
• Suspension oil (specific to Manitou shocks)
• A clean, flat surface to work on
• Shock pump
• Towel or rag for cleaning
• Latex gloves (optional for hygiene)
• Manitou oil change kit (includes necessary seals and washers)

Preparing the Shock for Oil Change

Before you begin the oil change process, it is essential to properly remove and prepare the shock:

1. Remove the Shock from the Bike: Use a 5mm Allen wrench [paid link] to remove the shock from the frame. Ensure that you place the bike securely to prevent it from tipping over.
2. Clean the Shock: Wipe down the shock with a clean rag to remove dirt and grime. This is crucial to prevent contaminants from entering the shock during the oil change.
3. Place the Shock on a Flat Surface: Lay the shock down on a clean, flat surface. This will ensure that it remains stable while you perform the oil change.

Disassembling the Mara Inline Trunnion Shock

With the shock securely in place, you can now begin disassembling the Mara Inline [paid link] Trunnion for oil access:

1. Remove the Air Valve: Use a 10mm socket wrench to carefully remove the air valve. Make sure you fully deflate the shock before proceeding with disassembly.
2. Remove the Trunnion Mounting Bolts: Use a 5mm Allen wrench to remove the mounting bolts holding the trunnion in place. This will allow you to separate the trunnion from the shock body.
3. Disassemble the Shock Body: Once the trunnion and air valve are removed, carefully unscrew any screws or fasteners holding the shock body together. Follow the shock’s internal structure, making sure you do not lose any small components like washers or seals.

Draining the Old Oil

After disassembling the shock, it’s time to drain the old oil:

1. Position the Shock Vertically: Place the shock in a vertical position to allow the oil to drain out properly.
2. Drain the Oil: Slowly and carefully tilt the shock to allow the oil to drain into a container. Allow it to sit for a few minutes to ensure all oil has drained out. This step ensures that you don’t mix old oil with new oil during reassembly.

Cleaning and Inspecting the Internal Components

While the shock is disassembling, it’s important to thoroughly clean and inspect each internal component:

1. Clean the Shock Internals: Use a clean rag or towel to wipe down the internal components of the shock. Make sure to remove any residue, dirt, or grime that may have built up during use.
2. Inspect the Seals and Washers: Carefully check the seals and washers for wear or damage. If any of these parts appear damaged, replace them with new ones from the Manitou oil change kit.

Reassembly and Oil Filling

With the shock cleaned and inspected, it’s time to reassemble and fill it with fresh oil:

1. Reinstall the Seals: Place new seals (if required) into their designated grooves, ensuring they are seated properly.
2. Add Fresh Suspension Oil: Using the correct suspension oil recommended by Manitou, slowly pour the oil into the shock body. Fill it until the oil level reaches the manufacturer’s specified level. It’s important not to overfill, as this can affect the shock’s performance.
3. Reassemble the Shock: Carefully put the shock body back together, ensuring all components are correctly aligned. Tighten all screws and fasteners securely, but do not overtighten them.
4. Reinstall the Trunnion and Air Valve: Attach the trunnion back to the shock body, securing it with the mounting bolts. Reinstall the air valve and tighten it using a torque wrench [paid link] to the manufacturer’s recommended torque specifications.

Reinstalling the Shock on the Bike

After completing the oil change, reinstall the shock on your bike:

1. Reinstall the Shock on the Frame: Position the shock back into its mount on the bike frame. Secure the mounting bolts with a 5mm Allen wrench.
2. Inflate the Shock: Using a shock pump, inflate the shock to the recommended air pressure for your weight and riding style. Make sure the pressure is correct to ensure proper suspension performance.

Testing the Shock

Once the oil change and installation are complete, it’s important to test the shock:

1. Check for Leaks: Inspect the shock for any oil leaks around the seals or mounting points. If you notice any leaks, disassemble the shock again and ensure that all seals are correctly installed.
2. Check Suspension Travel: Press down on the rear of the bike to test the shock’s compression and rebound. Ensure the shock is functioning smoothly and there is no unusual resistance or noise.

Troubleshooting Common Set-Up Issues

If you experience any issues with your Mara Inline [paid link] Trunnion shock after the oil change, consider the following troubleshooting tips:

• Shock Is Too Soft or Too Firm: This can indicate that the shock was either overinflated or underinflated. Adjust the air pressure accordingly and test again.
• Oil Leaks: If oil is leaking from the shock, it may be due to improperly seated seals or a damaged seal. Reinspect and replace any damaged seals or washers.
• Unusual Noises: If the shock is making noises such as squeaks or grinding, it could be due to dirty or worn-out internal components. Clean and inspect the shock again, and replace any damaged parts.

Customization and Optimization for Better Performance

The Mara Inline Trunnion shock can be customized to suit your riding style and preferences:

1. Adjust Rebound and Compression: Experiment with the rebound and compression settings to find the optimal balance for your riding conditions. This will improve both comfort and control.
2. Tuning Air Pressure: Adjusting the air pressure based on your weight and riding style can have a significant impact on shock performance. Lighter riders may benefit from lower pressure, while heavier riders may need more air to achieve the proper sag.
3. Changing Oil Type: For specialized riding conditions, such as extreme temperatures or specific terrain, you may consider using a different type of suspension oil. Consult the Manitou specifications for recommendations based on your needs.

Comparison with Similar Models

When comparing the Mara Inline Trunnion shock with other models in the market, it stands out for its advanced damping system and lightweight design. Other popular shocks in the same category may have different air spring designs or damping systems, but the Mara Inline offers a solid balance of comfort and performance. Riders seeking an efficient, reliable rear shock for cross-country or trail riding should consider the Mara Inline Trunnion as a top option.

Compatibility with Other Drivetrain Components

The Mara Inline Trunnion shock is compatible with most modern mountain bike frames and drivetrain systems. When installing the shock, ensure that it aligns with the frame’s suspension design and that it works in tandem with other drivetrain components such as the chain, derailleur, and brakes. Always refer to the manufacturer’s recommendations for compatibility, and avoid mismatching parts that could affect the overall performance of the bike.