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This document details the procedure for bleeding air out of a vehicle's hydraulic brake system.

AI caption November 2005 · Photo 287 of 412

BLEEDING HYDRAULIC SYSTEM Bleeding Procedure A. To bleed air out of a master cylinder equipped with fastfill mechanism. 1. Fill reservoir with recommended brake fluid, and make sure it is kept full at all times while bleeding air out of system. 2. Remove primary line from master cylinder. (This is line at rear, nearest vacuum booster.) 3. Place a container beneath master cylinder to avoid spillage of brake fluid. Depress brake pedal all the way down. Release pedal slowly. Wait five seconds. Repeat steps 4 through 6 until clear fluid comes out of primary cylinder. Replace primary line and tighten. 9. Depress brake pedal all the way down. 10. Loosen primary line at master cylinder to bleed remaining air out of linejunction. 11. Tighten primary line. 12. Release pedal slowly. 13. Wait five seconds. 14. Repeat steps 9 through 13 until clear fluid comes out of primary line-junction. ' 15. Now, bleed secondary bore of master cylinder by removing secondary line and using same procedures outlined above. However, instead of waiting five seconds after pedal is released, wait 20 seconds or more while bleeding secondary side. Do not pump pedal at any time while bleeding air out of secondary system. 16. Bleed air out of lines and wheel cylinders or calipers according to following proce- dure. TFF"? 9 To bleed hydraulic lines and wheel cylinders/ calipers pressurized by secondary piston in master wlinder (right rear wheel cylinder and left front caliper): 1. Top up reservoir with recommended brake fluid. 2. Connect a transparent vinyl tube to air bleeder valve of wheel cylinder or caliper. senses 3. Depress brake pedal all the way down. Do not pump pedal. Open bleeder valve to release air. Close bleeder valve. Release brake pedal slowly. Wait 20 seconds. Repeat steps 3 through 7 above un'til clear brake fluid comes out of air bleeder valve. 9.ng To bleed hydraulic lines and wheel cylinders/ calipers pressurized by primary piston in master cylinder (left rear wheel cylinder and right front caliper): 1. Top up reservoir with recommended brake fluid. 2. Connect a transparent vinyl tube to air bleeder valve of wheel cylinder or caliper. 3. Fully depress brake pedal several times. 4. With brake pedal depressed, open bleeder valve to release air. 5. Close bleeder valve. 6. Repeat steps 3 through 5 above until clear brake fluid comes out of air bleeder valve.

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