BRAKE FLUID AIR BLEEDING
| CAUTION | Keep the fluid level in the reservoir at 3/4 full or more during the air bleeding. Be careful not to spill brake fluid on any painted surfaces. Rinse off any spilled brake fluid with water. Begin air bleeding with the brake equipment that is furthest from the master cylinder. |
Specified fluid
- SAE J1703 or FMVSS116 DOT-3
Scheme 42
- Remove the bleeder cap on the brake caliper or wheel cylinder, and attach a vinyl tube to the bleeder screw.
- Place the other end of the vinyl tube in a clear container and fill the container with fluid during air bleeding.
- Working with two people, one should pump the brake pedal several times and depress and hold the pedal down.
- While one technician depresses the brake pedal, another technician loosens the bleeder screw using any commercially available flare nut wrench, drain out any fluid containing air bubbles, and then tighten the bleeder screw. (Scheme 42): Loosening Bleeder Screw Tightening Torque Front: 6.9-9.8 N.m {71-99 kgf.cm, 62-86 in.lbf} Rear: 6.9-8.8 N.m {71-89 kgf.cm, 62-77 in.lbf}
- Repeat Steps 3 and 4 until no air bubbles are seen.
- Perform air bleeding in the order of the procedure described above for all brake calipers or wheel cylinders.
- After air bleeding, inspect the following: Brake operation Fluid leak(s) Fluid level (See «BRAKE FLUID INSPECTION»(ref-517456-S14819445012012121200000).)
Scheme 43
- Remove the vacuum hose. (See «VACUUM HOSE REMOVAL/INSTALLATION»(ref-517456-S03748853562012121200000).) (Scheme 43): Inspecting Vacuum Line
- Verify that air flows through to the intake manifold side when blown by mouth from the vacumn hose of the power brake unit, and that air does not flow through to the power brake unit when blown in the opposite direction from the intake manifold. If there is any malfunction in the inner area of the check valve, replace it together with the vacuum hose as a single unit.
- Install the vacumn hose. (See «VACUUM HOSE REMOVAL/INSTALLATION»(ref-517456-S03748853562012121200000).)