Conventional Brake System: Other Mazda 3 BL

AIR BLEEDING

Note. Keep the fluid level in the reserve tank at 3/4 full or more during the air bleeding. Begin air bleeding with the brake caliper that is furthest from the master cylinder.

Brake fluid type

SAE J1703, FMVSS 116 DOT3

Scheme 62

1. Remove the bleeder cap on the brake caliper, and attach a vinyl tube to the bleeder screw.
2. Place the other end of the vinyl tube in a clear container and fill the container with fluid during air bleeding.
3. Working with two people, one should pump the brake pedal several times and depress and hold the pedal down.
4. While the brake pedal is depressed, the other should loosen the bleeder screw using the SST or any commercially available flare nut wrench, drain out any fluid containing air bubbles, and tighten the bleeder screw. Tightening torque Front (LF, L3): 7-9 N.m {72-91 kgf.cm, 70-79 in.lbf} Front (L3 WITH TC): 12-16 N.m {123-163 kgf.cm, 107-141 in.lbf} Rear: 12-16 N.m {123-163 kgf.cm, 107-141 in.lbf}
5. Repeat Steps 3 and 4 until no air bubbles are seen.
6. Perform air bleeding as described in the above procedures for all brake calipers.
7. After air bleeding, inspect the following: Brake operation Fluid leakage Fluid level

Scheme 63

1. Remove the vacuum hose. (See «VACUUM HOSE REMOVAL/INSTALLATION»(ref-345233-S19824440552009102000000) ).
2. Verify that air can be blown from the power brake unit side of the vacuum hose towards the intake manifold side, and that air cannot be blown in the opposite direction. If there is any malfunction of the inner check valve, replace it together with the vacuum hose as a single unit.

Scheme 64

Scheme 65

Scheme 66

Scheme 67

1. Disconnect the vacuum hose connector from the power brake unit while pressing the tabs of the vacuum hose connector. (LF, L3)
2. Pinch open the clip using pliers and disconnect the vacuum hose from the power brake unit. (L3 WITH TC)
3. Insert a thin flathead screwdriver at the point indicated by the arrow in the figure, push the ring down and disconnect the vacuum hose from the intake manifold.
4. Remove the vacuum hose.
5. Install in the reverse order of removal.
6. Verify that the vacuum hose is inserted so that the joint contacts the intake manifold ring. (LF, L3)
7. Insert the vacuum hose connector to the power brake unit. (LF, L3)
8. Verify that the vacuum hose is inserted so that the connector contacts the power brake unit flange. (LF, L3)

Scheme 68

1. Measure the distance from the center of the upper surface of the pedal pad to the floor covering and verify that it is as specified. If not within the specification, replace the brake pedal. Brake pedal height (reference value) 136.4 mm {5.37 in}