Rear Brake Components Inspection And Repair - Toyota Hilux Surf 1993 Owner's Manual

BR–58
BRAKE SYSTEM – Rear Brake – 4WD
10. DISASSEMBLE WHEEL CYLINDER
Remove the following parts from the wheel cylinder:
Two boots
•
Two pistons
•
Two piston cups
•
Spring
•
INSPECTION AND REPAIR OF REAR BRAKE
COMPONENTS
1. INSPECT DISASSEMBLED PARTS
Inspect the disassembled parts for wear, rust or damage.
2. MEASURE BRAKE SHOE LINING THICKNESS
Standard thickness: 6.0 mm (0.236 in.)
Minimum thickness: 1.0 mm (0.039 in.)
If the shoe lining is less than minimum or shows signs of
uneven wear, replace the brake shoes.
HINT: If any of the brake shoes have to be replaced, re–
place all of the rear shoes in order to maintain even brak-
ing.
3. MEASURE BRAKE DRUM INSIDE DIAMETER
Standard inside diameter: 295.0 mm (11.61 in.)
Maximum inside diameter: 297.0 mm (11.69 in.)
If the drum is scored or worn, the brake drum may be
lathed to the maximum inside diameter.
4. INSPECT REAR BRAKE LINING AND DRUM FOR PROP-
ER CONTACT
If the contact between the brake lining and drum is im
proper, repair the lining with a brake shoe grinder, or re
place the brake shoe assembly.