Hydraulic disc brake repair guide

Bicycle Braking Parts is one of the most important parts of our bike, and today we come to show you how to check your cleaning of your hydraulic discs in all directions. There are many brands of hydraulic disc brakes on the market, and we take Shimano XT as an example to illustrate the operation, many brands of cleaning inspection procedures are similar. Tools: Piston expansion tool, Allen wrench, Brake cleaner, Oval caliper, Wipes, Small brush Material: new to make tablets, discs, O-rings high temperature grease.

▲ first remove the wheel, Use the hex wrench to release the fixing screw on the brake lining

Use the expansion tool to reset the brake lining for later removal and inspection

▲ Remove the old brake lining from the clip

Check the brake lining wear, when the brake lining wear to 0.5mm, or spring contact with the disc, you must immediately replace the new brake lining. Such as the above picture, brake lining has been very serious wear and tear.

It is recommended to buy the original brake lining, the market has a lot of cheap fancy repair parts, but the quality can not be guaranteed, I encountered a case that owing to the brake lining base tolerance is too large lead to brake abnormalities, adjust the clean to no avail On the original brake lining, the abnormal sound immediately disappeared.

▲ to ensure that the new brake lining at least 2mm thickness, completely clean the clip before installation

Then we check the disc, the disc also has the wear limit, the disc's ultimate thickness will be marked on the disc. In addition we have to check whether the disc is bent or cracked.

▲ If the disc thickness is less than 1.5mm, should be replaced immediately

Rescue the piston, lightly brake the handle, observe the movement of the piston, we can see the right piston moving more than the left piston. Usually the cause of uneven piston movement may be due to the emergence of air bubbles in the oil, or piston edge,O-ring was contaminated, and then to clean and investigation.