Toyota
Dodge Durango
 Service Manual
Brakes » Base brake system » Diagnosis and testing
Brake fluid contamination

Indications of fluid contamination are swollen or deteriorated rubber parts.

Swollen rubber parts indicate the presence of petroleum in the brake fluid.

To test for contamination, put a small amount of drained brake fluid in clear glass jar. If fluid separates into layers, there is mineral oil or other fluid contamination of the brake fluid.

If brake fluid is contaminated, drain and thoroughly flush system. Replace master cylinder, proportioning valve, caliper seals, wheel cylinder seals, Antilock Brakes hydraulic unit and all hydraulic fluid hoses.

    More about «Diagnosis and testing»:

    Base brake system

    Brake lamp switch

    Red brake warning lamp

    Master cylinder/power booster

    Combination valve

    Disc brake rotor

    Brake drum

    Brake line and hoses

    Brake fluid contamination

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