Troubleshooting (Mitsubishi Pajero 4)

The faults in the brake system and their causes are listed in the table, the numbers in the table are ordered according to the most probable sequence of occurrence of failures and the performance of checks of the parts that should be replaced if necessary.

Signs	Possible reasons
Brake drag	1. Free travel of the brake pedal (inadequate). 2. Parking brake lever travel (incorrect adjustment). 3. Parking brake cable (blocked). 4. Rear brake pad clearance (incorrect adjustment). 5. Brake discs or friction linings (soot or deformation). 6. Piston (blocked or jammed). 7. Tension spring or return spring (failure). 8. Vacuum booster (air leak). 9. Master brake cylinder (damaged). 10. Hydraulic booster push rod (incorrect adjustment).
Insufficient braking force	1. Piston (blocked). 2. Brake discs or friction linings (grease ingress). 3. Piston (jammed). 4. Brake disc (worn out). 5. Friction linings (cracking or deformation).
Brake pedal (fails or gives off a lot)	1. Brake system (brake fluid leak). 2. Brake system (air leak). 3. Brake discs or friction linings (wear). 4. Brake discs or friction linings (soot or deformation). 5. Rear brake pad clearance (incorrect adjustment). 6. Brake discs or friction linings (grease ingress). 7. Brake discs or friction linings (abnormal contact). 8. Brake disc (worn out). 9. Hydraulic booster push rod (incorrect adjustment). 10. Vacuum leak in the booster system.
Noise when brakes are applied	1. Brake discs or friction linings (soot or deformation). 2. Mounting bolts (loosening the tightening). 3. Brake disc (worn out). 4. Brake disc support (the fastening is loose). 5. Sliding cotter pin (wear). 6. Brake discs or friction linings (pollution). 7. Brake discs or friction linings (abnormal contact). 8. Return, tension spring (damage). 9. Soundproofing plate (damage). 10. Brake pedal positioning spring (damage).