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BR–4
4. Booster air-tight performance check under loaded condition
(1) Connect a negative pressure gauge to the booster,
using a "T or Y" pipe joint.
(2) Start the engine with the brake pedal depressed with a
force of 200 N.
(3) Stop the engine when the negative pressure exceeds
500 mmHg.
(4) Ensure that the negative pressure retained in the brake
booster will not drop 25 mmHg or more for 15 seconds
since the engine is stopped.
It means that the air tightness is proper. If not, check air
leakage of the check valve in the brake booster hose.
AIR BLEEDING
1. Fill and maintain the brake fluid level in the reservoir tank
at the upper level during the operation.
NOTE:
·
If the brake fluid is spilled inadvertently over the paint-
finish surface of the vehicle or resin-made parts, imme-
diately wipe off the brake fluid and flush with fresh water.
·
When drain the brake fluid, do not fill brake fluid into
the reservoir tank.
2. Connection of vinyl hose to bleeder plug of wheel cylinder
Connect a suitable vinyl or rubber hose to the bleeder
plug of the wheel cylinder and submerge one end of the
vinyl or rubber hose in a container filled with the brake
fluid. Connect the other end of the vinyl hose to the wheel
cylinder bleeder plug of the vehicle.
NOTE:
·
Start the air bleeding operation at the wheel cylinder
which is located at the furthermost point from the mas-
ter cylinder.
3. Air bleeding
(1) Perform the operation by two persons. One person
should depress the brake pedal slowly and hold it in a
depressed state.
(2) While depressing the brake pedal, the other person
slackens the bleeder plug 1/3 through 1/2 turn to drain
the brake fluid. Then, tighten the bleeder plug tem-
porarily.
(3) Repeat the steps (1) and (2) above, until bubbles are
no longer observed in the fluid.
NOTE:
·
It may require more time than the ordinary brake sys-
tem if the vehicle is equipped with ABS.
(4) Tighten the bleeder plug securely to the specified tighten-
ing torque.
Tightening Torque:
4. Checking of brake fluid leakage
Ensure that no brake fluid leakage exists on the brake line
when the brake pedal is depressed fully.
6.9 - 9.8 N·m (0.7 - 1.0 kgf-m)
4
5
3
6
2
1
7
x100mmHg
T pipe joint
Front
Rear
JBR00009-00008
JBR00010-00009
JBR00011-000010
JBR00012-00011
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