13. BRAKE SYSTEM MXU 300/250 Master Cylinder Spring Main Piston Remove the washer, main piston and spring from the brake master cylinder. Clean the inside of the master cylinder and brake reservoir with brake fluid. Snap Ring Rubber Cover INSPECTION Check the cylinder inside wall, and spring for scratch, corrosion or other abnormal condition. If any abnormal condition is found, replace the inner parts or master cylinder. 13-7