Shimano BR-M615 bleeding spacer - SHIMANO - Y8J712100
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Product Information
Full details
This guide is for cyclists who need to maintain their Shimano BR-M615 hydraulic disc brakes. The genuine Shimano Y8J712100 bleeding spacer ensures a precise and clean brake bleeding process, preventing contamination and ensuring optimal brake performance. A key benefit is its role in maintaining the integrity of your brake system during maintenance, though it is a single-use item during the bleeding process itself.
All features
| Series | BR-M615 |
|---|---|
| Model Part Number | Y8J712100 |
| Brand | SHIMANO |
Extended Product Information
FAQs
What is the main purpose of the Y8J712100 bleeding spacer?
Its main purpose is to keep the caliper pistons correctly positioned and isolated during the brake bleeding process, preventing them from extending too far or becoming contaminated.
Can I use this spacer with other Shimano brake models?
This specific spacer (Y8J712100) is designed for the Shimano BR-M615 series. While some Shimano calipers might share similar dimensions, it is always best to use the spacer recommended for your specific brake model to ensure proper fit and function.
Do I need a special tool to install the spacer?
No, the spacer is designed to be inserted by hand between the caliper pistons after the brake pads have been removed.
How often should I replace this bleeding spacer?
The bleeding spacer is typically a consumable part. While it's durable, it's good practice to use a clean spacer for each brake bleed. If it shows signs of wear or contamination that cannot be cleaned, it should be replaced.
What type of fluid is used with Shimano BR-M615 brakes?
Shimano BR-M615 brakes use Shimano's proprietary mineral oil. Do not use other types of hydraulic fluid, such as DOT fluid, as this can damage the brake system.
Where is this product manufactured?
The product is manufactured in China.
What are the package dimensions?
The package dimensions are approximately 6.0 cm (Length) x 2.0 cm (Width) x 7.0 cm (Height).
Troubleshooting
Brake lever feels spongy after bleeding.
Ensure the bleeding spacer was used correctly and that no air was trapped. Re-bleed the brakes, ensuring the bleed port is sealed properly during the process and the lever is held firmly. Check for any leaks.
Pistons do not retract fully.
Verify the bleeding spacer was removed before reinstalling brake pads. Clean the pistons gently with isopropyl alcohol and a soft cloth, then carefully retract them using a plastic brake piston tool or a suitable flat object, ensuring to not damage the seals.
Spacer does not fit snugly.
Confirm you are using the correct spacer for the BR-M615 caliper. If it still feels loose, ensure there is no debris on the pistons preventing a proper seat. This spacer is designed for a precise fit.
Pros and Cons
Pros
- Ensures a clean and efficient brake bleeding process.
- Guarantees perfect fit and function with Shimano BR-M615 calipers.
- Helps maintain the longevity of your hydraulic brake system.
- Genuine Shimano part for reliable quality.
- Simple to use, even for home mechanics.
Cons
- A consumable part, typically replaced after each brake bleed.
- Only compatible with specific Shimano brake models.
- Requires purchase, not a permanent fixture.
- Easy to lose if not stored carefully between uses.
Setup, Compatibility & Care
Setup:
- Remove the brake pads from the BR-M615 caliper.
- Insert the Shimano Y8J712100 bleeding spacer firmly between the two caliper pistons.
- Proceed with the brake bleeding procedure as per Shimano's service manual, using the appropriate bleeding kit and Shimano mineral oil.
- After bleeding, remove the spacer and reinstall the brake pads.
Compatibility:
This bleeding spacer is specifically designed for Shimano BR-M615 hydraulic disc brake calipers. Always verify compatibility with your specific brake model before purchase.
Care:
While this is a single-use item during the bleeding process, if it becomes contaminated with brake fluid or dirt, it should be cleaned thoroughly with isopropyl alcohol and allowed to dry completely before use. It is recommended to store the spacer in a clean, dry place, such as a small plastic bag, to prevent contamination when not in use.