Hydraulic Brake System Troubleshooting

Fig. 18 Brake Diagnosis Chart (Part 1 Of 5). Front Disc/Rear Drum System:

Fig. 18 Brake Diagnosis Chart (Part 2 Of 5). Four Wheel Disc System:

Fig. 18 Brake Diagnosis Chart (Part 3 Of 5).:

Fig. 18 Brake Diagnosis Chart (Part 4 Of 5). Models w/Gasoline Engine:

Fig. 18 Brake Diagnosis Chart (Part 5 Of 5).:

Fig. 19 Power Brake Diagnosis Chart:

When troubleshooting the hydraulic brake system, perform the following checks and inspections as outlined below. If problem still exists within system, refer to Fig. 18 first, then to Fig. 19 as necessary.

ROAD TESTING
When testing brakes, ensure the road is level and dry. Test brakes at both light and heavy pedal pressure. Do not lock up brakes or slide tires during a brake test.
Check the tires on the vehicle before performing a brake test. Tires should be equally inflated, identical in size and with equal tread pattern. Excessive camber and caster will cause the brakes to pull. An overloaded vehicle will also brake erratically.

CHECKING FOR FLUID LEAKAGE
Start engine and depress the brake pedal. If the pedal gradually falls under constant pressure, the hydraulic system may be leaking. Raise the vehicle on a lift and check all tubing lines and backing plates for signs of leakage. It may be necessary to lift or remove the carpeting or floor mats to check for booster or master cylinder leakage.