Jeep 1987 Wrangler Workshop Manual page 973

BRAKE SYSTEM
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SPECIFICATIONS
GENERAL SPECIFICATIONS
DISC BRAKES:
Caliper piston bore diameter . .66 mm (2.6 in.)
Rotor diameter .280.4 mm (11.02 in.)
Rotor thickness (new) .22.45 mm (0.88 in.)
Minimum usable rotor thickness 20.7 mm (0.815 in.)
Maximum rotor face runout .0.10 mm (0.004 in.)
Brake pad wear limit replace when lining is worn to within
0.79 mm (0.031 in.) of rivet heads.
DRUM BRAKES:
Wheel cylinder bore diameter . . . . . . . 22.2 mm (0.875 in.)
Drum diameter (new) 254 mm (10.00 in.)
Maximum usable drum diameter 255.5 mm (10.060 in.)
Drum width 44.45 mm (1.75 in.)
Brakelining wear limit replace when lining is worn to within
0.794 mm (1/32 in.) of rivet heads.
MASTER CYLINDER:
Bore diameter .23.8 mm (0.937 in.)
BRAKE BOOSTER:
Diameter . . . . . . . . . . . . . 200 mm (7.874 in.)
Type Single diaphragm
BRAKE FLUID:
SAE rating J1703F
DOT rating DOT 3 or DOT 4
Note: Use Jeep brake fluid or an equivalent that conforms to both of the above ratings.
84021A
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