Disc Brakes - Jeep 1979 CJ-5 Technical & Service Manual

BRAKES 26-39
D I S C B R A K E S
Brakeshoe Replacement—CJ Models 2G-45 Disc Brake Operation 2G-40
Brakeshoe Replacement—Cherokee-Wagoneer-Truck Models 2G-42 Rotor Service 2G-50
Caliper Overhaul—CJ Models 2G-48 Specifications 2G-53
Caliper Overhaul—Cherokee-Wagoneer-Truck Models 2G-43
General 2G-39
GENERAL
Jeep vehicles are equipped with single piston, floating
caliper front disc brakes. Two different calipers are
used. On CJ models, the caliper is positioned on abut-
ement surfaces machined into the leading and trailing
edges of the caliper anchor bracket (fig. 2G-27). On Cher-
okee, Wagoneer, and Truck models, the caliper is posi-
tioned on mounting bolts located in the caliper support
bracket (fig. 2G-28). Although the two caliper designs
differ in construction, caliper operation and service pro-
cedures are similar.
All models are equipped with an integral-type hub
and rotor. CJ models use an 11.7 inch (29.71 cm) rotor.
Cherokee, Wagoneer and J-10 Truck models use a 12.0
inch (30.48 cm) rotor. J-20 Truck models use a 12.5 inch
(31.75 cm) rotor.
Both caliper types consist of a one-piece casting con-
taining a piston, piston bore, bleeder screw and fluid
inlet ports. The piston and piston seal are contained
within the piston bore. The piston seal is located in a
groove machined in the bore wall. An all-rubber dust
boot is used on CJ models while a combination rubber
boot with integral metal retainer is used on Cherokee,
Fig. 21-27 Disc Brake Assembly—CJ Models