TOYOTA PREVIA 91-97 REPAIR MANUAL

9-26 BRAKES

20. Check the clearance between the brake shoes and drum:
    a. Remove the brake drum.
    b. Measure the brake drum inside diameter and diameter of
    shoes. The difference is "Shoe-to-drum clearance" and should
    imately 0.024 inch (0.6mm). If incorrect, check the parking brak

e brake

approx-

! system.

-»A special brake caliper tool is required to gauge the brakti drum
inside diameter and "Shoe-to-drum clearance". However it is not
required to perform brake shoe adjustment.

21. Install the brake drum.


22. Adjust the brake pedal until a slight drag is felt when the dium is
    spun by hand.


23. Pull the parking lever all the way up until a clicking sound; :an no
    longer be heard. Check the clearance between brake shoes and br|; ke drum


24. Install the rear wheels, tighten the wheel lug nuts and lowqthe
    vehicle.


25. Retighten the wheel lug nuts and pump the brake pedal a fi:w times
    before moving the vehicle. Adjust the rear brakes again if necessaiy.


26. Check the level of brake fluid in the master cylinder, then perform a
    test drive.

ADJUSTMENTS

All models are equipped with self-adjusting rear drum brakes. Under
normal conditions, adjustment of the rear brake shoes should not 36 neces-
sary. However, if an initial adjustment is required insert the blade l:if a brake
adjuster tool or a screw driver into the hole in the brake drum andlturn the
adjuster slowly. The tension is set correctly if the tire and wheel assembly
will rotate approximately 3 times when spun with moderate force. Ipo not
over adjust the brake shoes. Before adjusting the rear drum brake ^hoes,
make sure emergency brake is in the OFF position, and all cables ^re free.

Wheel Cylinders

REMOVAL & INSTALLATION

1. Plug the master cylinder inlet to prevent hydraulic fluid fron
   Raise and safely support the vehicle.

leaking.

** CAUTION

Brake fluid contains polyglycol ethers and polyglycols.
contact with the eyes and wash your hands thoroughly a
dling brake fluid. If you do get brake fluid in your eyes,
your eyes with clean, running water for 15 minutes. If
tion persists, or if you have taken brake fluid internally,
DIATELY seek medical assistance.

Avoid

Hi

eye

:er han-

lush

irrita-

MME-

2. Remove the brake drums and shoes.


3. Working from behind the backing plate, disconnect the hyd^ulic
   from the wheel cylinder.


4. Unfasten the screws retaining the wheel cylinder and withdraw the
   cylinder.
   To install:


5. Attach the wheel cylinder to the backing plate. Tighten the blfclts to 7
   ft. Ibs.(IONm).


6. Connect the hydraulic line to the wheel cylinder and tighten it.
   7 install the brake shoes and drums. Make all the necessary ad jstments.


7. Fill the master cylinder to the proper level with clean brake I uid
   bleed the brake system. Check the brake system for leaks.

OVERHAUL

I See Figures 98 thru 107

Wheel cylinder overhaul kits may be available, but often at littlalor no
savings over a reconditioned wheel cylinder. It often makes sense |with

Fig. 98 Remove the outer boots from the wheel cylinder

Fig. 99 Compressed air can be used to remove the pistons and

seals

Fig. 100 Remove the pistons, cup seals and spring from the

cylinder