Remove the cap from the reservoir of the brake system and, using a syringe, pump out the brake fluid.
Place a clean rag under the brake master cylinder to catch any leaked brake fluid.
Turn out the screw of fastening of a tank to the main brake cylinder.
Pulling up, remove the reservoir from the brake master cylinder.
Pic. 11.37. Removing the sealing ring from the brake master cylinder
Remove o-rings from brake master cylinder (pic. 11.37). Check the condition of the sealing rings. If they are hardened or damaged, replace them.
Lubricate the new O-rings with fresh brake fluid and install them in the brake master cylinder.
Screw the screw of fastening of a tank to the main brake cylinder.
Pour brake fluid into the reservoir of the brake system.
Remove air from the main brake cylinder.