1998 Jeep Wrangler Brake Service (ONLINE REPAIR MANUALS)

Front

• Raise and support vehicle, then remove wheel and caliper as outlined under "Caliper Service."
• Remove retainers securing rotor to hub, Fig. , then slide rotor off hub studs.
• Reverse procedure to install.

Rear

• Raise and support vehicle, then remove wheel and caliper as outlined under "Caliper Service."
• Remove access plug from brake splash shield, then rotate adjuster screw with brake tool as shown in Fig. to back off parking brake shoes. Driver's side screw must be rotated clockwise and passenger's side counterclo...

Removal

Front

• Unfasten caliper as outlined under "Caliper Service." It is not necessary to disconnect brake hose from caliper. Support caliper at all times to prevent brake hose damage.
• Remove outboard brake pad from caliper by pressing one end inward to release pad lug.
• Rotate shoe upward until spring clears caliper.
• Press other end of pad inward to release other lug, then rotate upwards and out of caliper.
• Grasp ends of inboard pad and tilt outward to release springs from caliper piston.
• Clean caliper interior using clean shop cloths. Do not use compressed air, as damage to du...

When working on or around brake assemblies, care must be taken to prevent breathing asbestos dust, as many manufacturers incorporate asbestos fibers in the production of brake linings. During routine service operations, the amount of asbestos dust from brake lining wear is at a low level due to a chemical breakdown during use, and a few precautions will minimize exposure. Do not sand or grind brake linings unless suitable local exhaust ventilation equipment is used to prevent exce...

Removal

Front

• Remove and discard ^2/3 of brake fluid from largest master cylinder reservoir.
• Raise and support vehicle, then remove front wheel.
• Press caliper piston to bottom of bore using suitable screwdriver or c-clamp.
• Disconnect brake hose at caliper and cap hose.
• On 1997-98 models, remove caliper mounting pins.
• On 1999 models, remove caliper spring support by prying spring out of caliper.
• On all models, remove caliper slide pin bushing caps and slide pins.
• Lift caliper up and out of anchor plate and off rotor.

Rear

• Raise and support vehicle, then remove wheel and caliper mounting bolt...

Master Cylinder/Power Booster Test

• Start engine and inspect booster vacuum hose connections for leaks.
• Stop engine and shift transmission into neutral.
• Pump brake pedal until all vacuum reserve in booster is depleted.
• Press and hold brake pedal under light foot pressure. Pedal should hold firm. If it falls away master cylinder is faulty.
• Start engine and note pedal action. Pedal should fall away slightly under light foot pressure, then hold firm.
• If no pedal action is felt, the power booster, vacuum supply or vacuum check valve are faulty. Proceed to "Power Booster Vacuum Test."
• If p...

• Raise and support vehicle.
• Remove rear wheel and tire assembly, then the caliper and anchor as an assembly.
• Remove rubber access plug from back of rear disc brake splash shield.
• If necessary, retract parking brake shoes with suitable brake adjuster tool.
• remove rotor from axle hub flange.
• Remove lower shoe to shoe spring/adjuster spring with needle nose pliers.
• Remove upper shoe...