Toyota Celica Supra 1986 Service And Repair Manual page 483

BR-6 BRAK E SYSTEM -Checks and Adjustments
CHECKS AND ADJUSTMENTS
CHECK AND ADJUSTMENT OF BRAKE PEDAL
1. CHECK THAT PEDA L HEIGHT IS CORRECT, AS
SHOWN
Pedal height from asphelt sheet: 154- 164 mm
(6 .06 - 6.46 in.)
2. IF NECESSARY, A DJUST PEDAL HEIGHT
(a) Sufficiently loosen the stop light switch.
(b) Adjust
the
pedal height by turning the pedal push rod.
(c) Return the stop light switch until it lightly coniJCII
the pedal stopper.
Pedal Height
(d) After adjusting the pedal height, check and adjust tho
pedal freeplay.
3. CHECK THAT PEDA L FREEPLAY IS. CORRECT, AS
SHOWN
(a) Stop the engine and depress the brake pedal
SOYtfll
Pecbl
Pu$h
Rod
time> until then: is no more vacuum left in Ito
Pedal Free Play
3-6mm
.....
booster.
(b) Push in the pedal until the beginning of resistanoe k
felt. Measure the distance, as shown.
Pedal freeplay:
3 - 6
mm (0,12 - 0.24 in.)
NOT E: The pedal freeplay is the amount of the strol<t
until the booster air valve is mo ved by the pedal push rod.
4. IF NECESSARY, ADJ UST PEDAL FREEPLAY
(a) If incorrect, adjust the pedal freeplay by turning Ito
pedal push rod.
(b) Start the engine and confirm that pedal freeploy
exists.
(cl After adjusting the pedal freeplay, check the pedal
height.
5. CHECK THAT PEDAL RESERVE DISTANCE IS
CORRECT, AS SHOWN
Release the parking breke.
With engine running, depress the pedal and measure 1ht
pedal reseove distance, as shown.
Pedal reserve d istance from asphalt sheet at
50 kg (110.21b, 490 N): More than 75 mm (2.95 in.)
If incorrect, troubleshoot the brake system •