Complaint | Symptom and possible causes | Remedy |
Insufficient brake power | 1. Leakage of brake fluid from hydraulic system | Repair or replace. |
2. Worn pads | Replace. | |
3. Oil adhesion of engaging surface of pads | Clean disc and pads. | |
4. Worn disc | Replace. | |
5. Air in hydraulic system | Bleed air. | |
6. Not enough brake fluid in the reservoir | Replenish. | |
Brake squeaking | 1. Carbon adhesion on pad surface | Repair surface with sandpaper. |
2. Tilted pad | Correct pad fitting or replace. | |
3. Damaged wheel bearing | Replace. | |
4. Loosen front wheel axle or rear wheel axle | Tighten to specified torque. | |
5. Worn pads | Replace. | |
6. Foreign material in brake fluid | Replace brake fluid. | |
7. Clogged return port of master cylinder | Disassemble and clean master cylinder. | |
Excessive brake lever stroke | 1. Air in hydraulic system | Bleed air. |
2. Insufficient brake fluid | Replenish fluid to specified level; bleed air. | |
3. Improper quality of brake fluid | Replace with correct fluid. | |
Leakage of brake fluid | 1. Insufficient tightening of connection joints | Tighten to specified torque. |
2. Cracked hose | Replace. | |
3. Worn piston and/or cup | Replace piston and/or cup. | |
Brake drags | 1. Rusty part | Clean and lubricate. |
2. Insufficient brake lever or brake pedal pivot lubrication | Lubricate. |