Toyota Supra 1990 Manual page 25

Pad Wear
Indicator
Rotor Disc
~-I
{j
MAINTENANCE - Maintenance Operations
MA-9
MA0132 MA0317
MA3159
MA0057 MA0537
BRAKES
13. INSPECT BRAKE LINE PIPES AND HOSES
HINT: Inspect in a well lighted area. Inspect the entire cir-
cumference and length of the brake hoses using a mirror
as required. Turn the front wheels fully right or left before
inspecting the front brake.
(a) Check all brake lines and hoses for:
• Damage
• Corrosion
• Wear
• Leaks
• Deformation
• Bends
• Cracks
• Twists
(b) Check all clamps for tightness and connections for
leakage.
(c) Check that the hoses and lines are clear of sharp
edges, moving parts and the exhaust system.
(d) Check that the lines installed in grommets pass
through the center of the grommets.
14. INSPECT FRONT AND REAR BRAKE PADS AND DISCS
(See pages BR-28, 36)
15.
(a) Check the thickness of the disc brake pads and check
for irregular wear.
Minimum pad thickness: 1.0 mm (0.039 in.)
HINT: If a squealing or scraping noise comes from the
brake during driving, check the pad wear indicator. If there
are traces of the indicator contacting the disc rotor, the
disc pad should be replaced.
(b) Check the disc for wear or runout.
Minimum disc thickness:
Front 21.0 mm (0.827 in.)
Rear 17.0 mm (0.669 in.)
Maximum disc runout: 0.13 mm (0.0051 in.)
INSPECT PARKING BRAKE LININGS AND DRUMS
(See page BR-41)
(a) Check the lining-to-drum contact condition and lining
wear.
Minimum lining thickness: 1.0 mm (0.039 in.)
(b) Check the brake drum for scoring or wear.
Maximum drum inside diameter: 191 mm (7.52 in.)
(c) Clean the brake parts with a damp cloth.
HINT: Do not use compressed air to clean the brake parts.