Shimano BL-M988 MTB brake bleed screw -Y8V398010

Shimano ’s Y8V398010 bleed screw is a genuine part designed to ensure the bleed port on Shimano hydraulic brake levers remains watertight. Supplied with its O-ring, it allows you to replace a damaged, worn or lost screw to ensure the hydraulic circuit remains perfectly sealed following a bleeding operation. Manufactured to the specifications Shimano, this M5 x 4.7 mm screw ensures precise fitting and optimum reliability to maintain braking performance. It offers a simple and cost-effective solution for extending the service life of your hydraulic brakes Shimano.

Key features

• Shimano genuine part.
• Supplied with a sealing O-ring.
• Dimensions: M5 x 4.7 mm.
• Ensures the hydraulic bleed port is sealed.
• Quick and easy to fit.
• Compatible with many Shimano brake levers.
• Ideal if the original screw is lost, worn or damaged.

Main compatibility

• XTR BL-M988
• XTR BL-M985
• XTR BL-M9120
• XTR BL-M9020
• Deore XT BL-M8100
• Deore XT BL-M8000
• SLX BL-M7100
• SLX BL-M7000
• Saint BL-M820
• Several other levers Shimano, share the same bleed screw reference number.

FAQ

What is this bleed screw used for?

It seals the bleed port on the hydraulic brake lever following servicing of the system. Its O-ring prevents any leakage of mineral oil Shimano.

Is the O-ring supplied?

Yes. Part number Y8V398010 includes the bleed screw and its original seal Shimano.

Is this part only compatible with the BL-M988?

No. Although it is originally designed for the XTR BL-M988 lever, Shimano also uses this part number on several compatible XTR, XT, SLX and Saint models.

Can an old bleed screw be reused?

Yes, if it is in good condition. However, if the thread is damaged, the head is damaged or the O-ring is worn, replacement is strongly recommended to prevent leaks. Feedback from users shows that a damaged seal or thread can cause oil leaks and compromise the system’s seal.

Is this a safety-critical part?

Yes. A poor seal at the bleed port can lead to hydraulic oil leakage and a deterioration in braking performance.