Adjustment And Maintenance Of Brake Pedal - Chery automobile Service Manual

Inspection of the check valve of vacuum hose (power assisted brake unit)
* Detach the clips and vacuum hoses
* Pump the engine-side hoses and apply the pressure force on it, and verify that the air
blows only to this side.
* If there are air flow in the both directions or not air flow at all, Replace the vacuum hose

ADJUSTMENT AND MAINTENANCE OF BRAKE PEDAL

* Adjustment of Clearance between Brake
Pedal and Floor
-- Operate the brake pedal 7 with a 300 N force as
shown in the figure. The clearance between the
brake pedal 7 and floor 8 shall not be less than 80
mm.
-- If the clearance is less than the limit value, firstly
remove the spring locking piece 9 which is used
to connect the vacuum booster 4 with the brake
pedal 7, then pull out the pin 10, unscrew the lock
nut 6 and adjust the push rod fork 5 until the
requirement is met.
* Adjustment of Brake Pedal Free Travel
-- Shut down the engine and step on the brake pedal several times to remove the vacuum
kept in the vacuum booster.
-- Press down the brake pedal by hand until the resistance is felt, in this case, the pressed
distance is the free travel of brake pedal, the required value of which is 3 to 6 mm.
-- In case the free travel is less than the required value, adjust the clearance between the
vacuum booster push rod and the master brake cylinder.
Caution: The free travel of brake pedal shall not be shortened due to the carpet laid on
the floor, otherwise the brake travel shortened may cause the brake
performance decrease, even disable the brake.
1. Nut
2. Brake master
cylinder
3. Check valve
of vacuum hose
4. Vacuum
booster
5. Push rod fork
6. Lock nut
P-4
.
7. Brake pedal
8. Floor
9. Spring
locking piece
10. Pin
11. Push rod