Introduction
This manual provides comprehensive instructions for the proper use and maintenance of your M-Wave Bleedbox Disc Brake Bleeding Kit. Please read this manual thoroughly before operation to ensure safe and effective use.
The M-Wave Bleedbox is an all-in-one kit designed for bleeding disc brakes, ensuring optimal performance and safety of your bicycle's braking system.
Product Contents
The M-Wave Bleedbox Disc Brake Bleeding Kit includes the following components:
- Two (2) 25 ml Syringes
- Two (2) M5 Adapters
- Two (2) M6 Adapters
- Four (4) O-rings (two for DOT 4 brake fluid, two for mineral oil)
- One (1) Tube Cutter
- One (1) Bleed Block (specifically for Promax disc brakes)

Image showing the complete M-Wave Bleedbox kit, including two syringes, various adapters, O-rings, a tube cutter, and a bleed block.
Setup and Preparation
- Identify Brake Fluid Type: Determine whether your disc brakes use DOT 4 brake fluid or mineral oil. This is crucial for selecting the correct O-rings and brake fluid.
- Gather Necessary Tools: In addition to the kit, you may need a wrench set, hex keys, clean rags, and appropriate brake fluid.
- Protect Surfaces: Brake fluid can damage painted surfaces. Place protective coverings under your work area.
- Wear Protective Gear: Always wear safety glasses and gloves when handling brake fluid.
- Prepare Syringes: Attach the appropriate M5 or M6 adapter to one of the 25 ml syringes. Ensure the correct O-ring (for DOT 4 or mineral oil) is used with the adapter to prevent leaks.
- Prepare Brake Caliper: Remove the wheel and brake pads from the caliper. Insert the bleed block into the caliper to prevent the pistons from closing. The included bleed block is designed for Promax disc brakes.

Detailed view of the syringes, adapters, and O-rings, highlighting the different types of O-rings for DOT 4 and mineral oil.
Operating Instructions: Disc Brake Bleeding Procedure
The following steps outline a general procedure for bleeding disc brakes. Specific steps may vary slightly depending on your brake model. Always refer to your brake manufacturer's instructions for detailed bleeding procedures.
- Fill Syringe: Fill one 25 ml syringe with the appropriate brake fluid (DOT 4 or mineral oil). Ensure there are no air bubbles in the syringe.
- Connect Syringe to Caliper: Connect the filled syringe with its adapter to the bleed port on the brake caliper. Ensure a secure, leak-free connection.
- Prepare Lever Syringe: Connect the second 25 ml syringe with its adapter to the bleed port on the brake lever. This syringe will collect fluid and air from the system.
- Open Bleed Ports: Loosen the bleed screws on both the caliper and the lever, typically by a quarter turn.
- Push Fluid Through: Slowly and steadily push fluid from the caliper syringe upwards through the brake system towards the lever syringe. Observe the fluid entering the lever syringe for air bubbles. Continue until no more air bubbles are visible.
- Tap Components: Gently tap the brake line, caliper, and lever to dislodge any trapped air bubbles.
- Close Bleed Ports: While maintaining pressure on the caliper syringe, close the bleed screw on the brake lever. Then, close the bleed screw on the caliper.
- Remove Syringes: Carefully remove both syringes, being mindful of any dripping fluid.
- Clean Up: Clean any spilled brake fluid immediately with a clean rag.
- Test Brakes: Reinstall brake pads and wheel. Pump the brake lever several times to build pressure. Test the brakes for proper function before riding.

Image displaying the tube cutter and bleed block, essential tools for preparing brake lines and protecting caliper pistons during bleeding.
Maintenance and Care
- Clean Components: After each use, thoroughly clean all components of the Bleedbox kit with soap and water, especially the syringes and adapters, to remove any brake fluid residue.
- Inspect O-rings: Regularly inspect the O-rings for signs of wear, cracking, or degradation. Replace them if necessary to ensure a proper seal during bleeding.
- Proper Storage: Store the kit in a clean, dry place away from direct sunlight and extreme temperatures.
- Dispose of Fluid: Dispose of used brake fluid according to local environmental regulations. Do not pour it down drains.
Troubleshooting
- Problem: Brake lever feels spongy after bleeding.
- Possible Cause: Air still trapped in the system.
- Solution: Repeat the bleeding procedure, ensuring all air bubbles are expelled. Pay close attention to tapping the brake line and components to release trapped air.
- Problem: Fluid leaks from connections during bleeding.
- Possible Cause: Loose connections or damaged O-rings.
- Solution: Ensure all adapters are securely tightened. Inspect O-rings for damage and replace if necessary. Confirm you are using the correct O-rings for your brake fluid type.
- Problem: Pistons are stuck or not retracting.
- Possible Cause: Contaminated fluid or dirty pistons.
- Solution: Perform a thorough flush of the system with fresh brake fluid. Clean caliper pistons if accessible and necessary. Consult a professional bicycle mechanic if the issue persists.
Specifications
| Feature | Detail |
|---|---|
| Model Name | M-Wave Bleedbox |
| Model Number | 360692 |
| Brand | M-Wave |
| Included Components | 2x 25ml Syringes, 2x M5 Adapters, 2x M6 Adapters, 4x O-rings (2x DOT 4, 2x Mineral Oil), 1x Tube Cutter, 1x Bleed Block (Promax) |
| Material | Plastic |
| Item Weight | 4 ounces |
| Item Dimensions (LxWxH) | 5.5 x 2.5 x 2.5 inches |
| UPC | 887539024840 |
Warranty Information
The M-Wave Bleedbox Disc Brake Bleeding Kit comes with a 90 Day Limited Warranty. This warranty covers manufacturing defects and material flaws under normal use. Please retain your proof of purchase for warranty claims.
For warranty service or inquiries, please contact M-Wave customer support through their official channels.
Customer Support
For further assistance, technical support, or questions regarding your M-Wave Bleedbox, please visit the official M-Wave website or contact their customer service department.
Online Resources: www.m-wave.com (Note: This is a placeholder URL as no specific support URL was provided in the product data. Please refer to the product packaging or official brand website for accurate support contact information.)





