Brake; Hydraulic Disc Brake - Shimano Ultegra R8050 Series Dealer's Manual

TO ENSURE SAFETY
„Brake
• Each bicycle may handle slightly differently depending on the model. Therefore, be sure to learn the proper braking technique (including brake lever
pressure and bicycle control characteristics) and operation of your bicycle. Improper use of your bicycle's brake system may result in a loss of control or
a fall, which could lead to severe injury. For proper operation, consult a professional bicycle dealer or the bicycle's owner's manual. It is also important
to practice riding and braking, etc.
• If the front brake is applied too strongly, the wheel may lock and the bicycle may fall forward, and serious injury may result.
• Always make sure that the front and rear brakes are working correctly before riding the bicycle.
• The required braking distance will be longer during wet weather. Reduce your speed and apply the brakes early and gently.
• If the road surface is wet, the tires will skid more easily. If the tires skid, you may fall off the bicycle; therefore, to avoid this, reduce your speed and
apply the brakes early and gently.
„Hydraulic disc brake
• Please make sure to keep your fingers away from the rotating disc brake rotor. The disc brake rotor is sharp enough to
inflict severe injury to your fingers if caught within the openings of moving disc brake rotor.
• The calipers and disc brake rotor will become hot when the brakes are operated; do not touch them while riding or immediately after dismounting
from the bicycle. Otherwise you may get burned.
• Be careful not to allow any oil or grease to get onto the disc brake rotor and brake pads. There is the danger that the brakes may not work correctly.
• If any oil or grease does get on the brake pads, you should consult a dealer or an agency. There is the danger that the brakes may not work correctly.
• If noise occurs during brake operation, the brake pads may have been worn down to the usable limit. Check that the
brake system temperature has been cooled down sufficiently, check the thickness of the brake pad. If the thickness is
0.5 mm or below, the brake pad needs to be replaced with a new one. Consult a dealer or an agency.
• If the disc brake rotor is cracked or deformed, immediately stop using the brakes and consult a dealer or an agency.
• If the disc brake rotor becomes worn down to a thickness of 1.5 mm or less, or if the aluminum surface appears, immediately stop using the brakes and
consult a dealer or an agency. The disc brake rotor may break, and you may fall off the bicycle.
• Vapor lock may occur if the brakes are applied continuously. To solve this problem, momentarily release the lever.
Vapor lock is a phenomenon in which the oil inside the brake system becomes heated, which causes any water or air bubbles inside the brake
system to expand. This can then result in a sudden increase in the brake lever stroke.
• The disc brake is not designed to work when the bicycle is upside down. If the bicycle is turned upside down or on its side, the brake may not work
correctly, and a serious accident could occur. Before riding the bicycle, be sure to operate the brake lever a few times to check that the brakes operate
normally. If the brakes do not operate normally, stop using the brakes and consult a dealer or an agency.
• If you feel no resistance when depressing the brake lever, immediately stop using the brakes and consult a dealer or an agency.
• If fluid leaks occur, immediately stop using the brakes and consult a dealer or an agency.
10
2 mm 0.5 mm