For recommends that the fluid level in the brake master cylinder reservoir be checked at least once a year.
Brake fluid is hydroscopic, that is to say it readily absorbs water. As water is absorbed into the fluid, it becomes contaminated. Contaminated brake fluid has a lower boiling point and will corrode vital brake system components. This may result in reduced braking performance and/or the need to replace expensive brake system components. It is highly recommended that the entire brake system be drained, flushed and refilled with fresh brake fluid when recommended by the manufacturer, or at least every 2 years.
Ford recommends the use of only fresh, uncontaminated brake fluid meeting or exceeding DOT 3 standards.
See Figures 1 and 2
- Check the level of brake fluid in the brake fluid reservoir. The fluid should be maintained at the MAX line on the reservoir. Brake fluid should be added if fluid level is more than 0.30 in. (7mm) below the MAX line.
Any sudden decrease in fluid level indicates a probable leak in the system and should be inspected immediately.
- Clean around the reservoir cap with a shop rag to prevent contaminating the fluid with dirt.
- Remove the cap and add the required amount of fluid to the system.
When making additions of fluid, use only fresh, uncontaminated brake fluid meeting or exceeding DOT 3 standards. Be careful not to spill any brake fluid on painted surfaces, because it will damage the paint. Do not allow the fluid container or brake fluid reservoir to remain open any longer than necessary; brake fluid absorbs moisture from the air, reducing its effectiveness and causing brake line corrosion.
- Install the reservoir cap.