Conventional Brake System: Other Mazda MX-5 NC рестайлинг

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 master cylinder and then continue with the brake caliper that is furthest away from the master cylinder. Finish by bleeding air from the master cylinder again.

Brake fluid type

SAE J1703, FMVSS 116 DOT-3

Scheme 44

1. Remove the cap from the brake fluid reserved tank and add brake fluid.
2. Remove the bleeder cap from the brake caliper, and connect a vinyl tube to the bleeder screw.
3. Place the other end of the vinyl tube in a clear container, and fill the container with fluid during air bleeding.
4. Working with two people, one should depress the brake pedal a few times and then depress and hold the pedal down.
5. While the brake pedal is being held down, the other person should loosen the bleeder screw using a commercially available flare nut wrench, and bleed any fluid containing air bubbles. Once completed, tighten the bleeder screw. Tightening torque Front: 6.9-9.8 N.m {71-99 Kgf.cm, 62-86 in.lbf} Rear: 6.0-8.0 N.m {62-81 Kgf.cm, 54-70 in.lbf}
6. Repeat Steps 3 and 4 until no air bubbles are seen.
7. Perform air bleeding as described in the above procedures for all brake calipers.
8. After air bleeding, inspect the following: Brake operation Fluid leakage Fluid level

Scheme 45

1. Remove the vacuum hose between the power brake unit and the intake manifold using pliers.
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 46

1. Measure the distance from the center of the upper surface of the pedal pad to the insulator and verify that it is as specified. If not within the specification, adjust the pedal height. Brake pedal height (reference value) 167 mm {6.57 in}

Using SST

Note. When performing the inspection using the SST , inspect the brake pipe on the left or right front wheel. The following procedure and illustrations show the inspection for the brake pipe on the left front wheel.

Scheme 47

Scheme 48

1. Loosen the brake pipe flare nut using the commercially available flare nut wrench.
2. Disconnect the brake pipe.
3. Remove the bolt and disconnect the brake hose.
4. Install the SSTs to the brake pipe as shown in the illustration.
5. Perform air bleeding of the SST and brake line from bleeder screw A.
6. install the pedal force gauge to the brake pedal.
7. Connect the vacuum piping to the vacuum gauge.

Checking for vacuum loss (loaded condition)

1. Start the engine.
2. Depress the brake pedal with a force of 200 N {20.4 kgf, 44.9 lbf} .
3. Stop the engine when the vacuum gauge reading reaches 68 kPa {510 mmHg, 20.1 inHg} with the brake pedal depressed.
4. Measure the amount of vacuum decrease for 15 s immediately after stopping the engine.
5. If the amount of vacuum decrease is 3.3 kPa {25 mmHg, 1.0 inHg} or less, the power brake unit is normal.