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T11 Service Manual Chassis System
Ⅷ Filling and Bleeding of Brake Fluid Hint: if air enters brake system when repairing or replacing brake parts, a complete exhaust procedure shall be performed. Prior to performing brake bleeding, front and rear exhaust cylinder pistons must return to the highest position; and the preferred method is to employ malfunction analyzer to perform the returning procedure. If the malfunction analyzer is not available, adopt the second procedure. However, it must be operated strictly in accordance with the above-described procedures. If air comes into the brake line due to the liquid level is too low, or the master cylinder brake lines are disconnected, all of the four braking hydraulic systems must be bled. If brake hose or brake is disconnected at some wheel, only bleeding the caliper of that wheel. If any joint of brake line or hose between master cylinder and brake is disconnected, only bleeding the disconnected line or the brake system that is related to the hose.
1) Bleeding of brake system a. Lift and properly sustain the vehicle. b. Fix the transparent plastic bleeding hose onto the bleeding valve of brake caliper. c. Immerge the other end of transparent plastic bleeding hose into a clean vessel containing part of clean brake. d. Slowly open the bleeding valve to allow the brake fluid flow. e. Shut off the bleeding valve when bubble does not appear in brake fluid any more. f. Remove the transparent plastic bleeding hose from bleeding valve.
Remark: the above procedures are applicable to the bleeding of brake line.
2. The bleeding sequence of brake system shall be: back, right, left, front, right back and left front. If ABS system is available, link the malfunction analyzer and start fluid filling and air bleeding procedure till completely bleeding the air in the ABS system. 3. Perform air bleeding to the brake loop. Joint the bleeding hose that has vessels to the bleed and bleeding valve of rear-left brake caliper. Open the bleeding valve, then push the brake pedal to the bottom for quite a few times. The discharged brake fluid must be clean and free of bubbles. Then keep the brake pedal to the bottom and cut off the bleed and bleeding valve. Finally release the brake, and the similar operation can also be performed to the brakes of other wheels. 4. Brake fluid filling |