TOYOTA PREVIA 91-97 REPAIR MANUAL

BRAKES 9-7

7. Fill the brake master cylinder with fresh brake fluid, then bleed the
   brake system.


8. Check and adjust the fluid pressure.


9. Test driver the vehicle.

FLUID PRESSURE ADJUSTMENT

t See Figures 16 thru 24

1. Set the vehicle unladen.


2. Measure the rear axle load and note the value.


3. Set the rear axle load. Standard load is 2028 Ibs. (920 kg).


4. Install a Load Sensing Proportioning gauge (SST 09709-29017) and
   bleed the air from the system.


5. Raise the front brake pressure to the following specifications and
   check the pressure of the rear brakes.

-»The brake pedal should not be depressed twice and returned
while setting to the specified pressure.

6. Read the value of the rear pressure 2 seconds after adjusting the
   specified fluid pressure.

Fig. 18 Place the vehicle without a load and measure the rear

axle load

Load Sensing Proportio

id By-Pass Valve

Fig. 16 The Load Sensing Proportioning and By-Pass valve with

adjuster is located near the rear axle of the vehicle

SST

Fig. 19 Attach brake pressure gauges to the front and rear

brakes, then bleed the lines

I

Fig. 17 Load sensing proportioning valve (1), by-pass valve (2)

and load sensing spring (3)

Front brake pressure

kPa (kgf/cnV, psi)

9,807 (100, 1,422)

Rear brake pressure

kPa (kgf/cm 1 , psi|

5.728 - 6,708

(58.4 - 68.4, 831 - 971)

Fig. 20 Rear pressure with rear drum brakes