Hydraulic Brake System Flushing
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Hydraulic Brake System Flushing
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Refer to
Brake Fluid Irritant Warning
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Refer to
Brake Fluid Effects on Paint and Electrical Components Caution
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1.
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Inspect the brake fluid for the following conditions, indicating brake fluid contamination:
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Fluid separation, indicating 2 types of fluid are present; a substance other than the recommended brake fluid has been introduced into the brake hydraulic system
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Swirled appearance-oil-based substance
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Layered appearance-silicone-based substance
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Fluid discoloration, indicating the presence of moisture or particles that have been introduced into the brake hydraulic system
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Cloudy appearance-moisture
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Dark appearance/suspended particles in fluid-dirt, rust, corrosion, brake dust
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2.
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Inspect the master cylinder reservoir cap diaphragm and the reservoir-to-master cylinder grommets for swelling, indicating brake fluid contamination.
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3.
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If the brake fluid WAS contaminated with an oil-based or a silicone-based substance, indicated by fluid separation and/or a swollen master cylinder reservoir cap diaphragm and/or swollen reservoir-to-master cylinder grommets, perform the following:
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Remove ALL of the following components listed from the vehicle. Each component contains internal rubber seals/linings which have been contaminated by the contaminated brake fluid in the brake hydraulic system.
Refer to the procedures indicated:
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Clean out all the hydraulic brake pipes using denatured alcohol, or equivalent.
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Dry the brake pipes using non-lubricated, filtered air.
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Repair or replace ALL of the following components listed and install them to the vehicle. Each component contains internal rubber seals/linings which have been contaminated by the contaminated brake fluid in the brake hydraulic system.
Refer to the procedures indicated:
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Master Cylinder Replacement
; also perform the following:
Clean the brake master cylinder reservoir using denatured alcohol, or equivalent, then dry the reservoir using non-lubricated, filtered air. Inspect the reservoir for cracks and/or damage and replace if necessary. Refer to
Master Cylinder Reservoir Replacement
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Replace the brake master cylinder reservoir cap diaphragm.
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4.
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If the brake fluid was NOT contaminated with an oil-based or a silicone-based substance, but WAS contaminated with water or dirt, rust, corrosion, and/or brake dust, replace the brake master cylinder reservoir cap diaphragm. The diaphragm may have allowed the moisture or particles to enter the hydraulic system.
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5.
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Fill the brake master cylinder reservoir to the maximum-fill level with approved brake fluid from a clean, sealed brake fluid container as specified in the owners manual.
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