1997 Jeep Wrangler Brake Service (ONLINE REPAIR MANUALS)

Prior to removing brake shoes it is recommended that a suitable clip or restraining device be applied to the wheel cylinders to prevent the wheel cylinder pistons from being pushed out of their bores.

Brake Shoe Removal

• Raise and support vehicle.
• Remove wheel and tire assemblies, then the brake drums.
• Remove U-clip and washer from parking brake lever pivot pin, Figs. and , then discard clip.
• Using suitable tool, remove primary and secondary return springs.
• Remove spring retainers, hold-down springs, and retaining pins.
• Install suitable clamps over ends of wheel cylinders.
• Remove adjuste...

Manual

• Remove reservoir filler caps and fill reservoir with proper brake fluid.
• If calipers or wheel cylinders were overhauled, open all caliper and wheel cylinder bleed screws.
• Close each bleed screw as fluid starts to drip from them.
• Fill master cylinder reservoir once more before proceeding.
• Attach one end of bleed hose to bleed screw and insert opposite end in glass container partially filled with brake fluid, Fig. . Ensure bleed hose is immersed in fluid.
• Open up bleeder, then have an assistant press down brake pedal.
• Once brake pedal is down, close bleeder. Repeat bleeding unt...

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...

Pedal Falls Away

• System leak at brake line, fitting, hose or caliper/wheel cylinder.
• Internal leakage in master cylinder caused by worn or damaged piston cups.
• Internal leak in ABS or RWAL system.

Low Pedal

• Worn brake linings.
• Worn drums or rotors.
• Rear brakes out of adjustment.

Spongy Pedal

• Air in hydraulic system.
• Thin brake drums.
• Substandard brake lines and hoses.

Hard Pedal Or High Pedal Effort

• Linings that are water soaked, contaminated or glazed.
• Defective power booster or check valve.

Pedal Pulsation

• Disc brake rotors have excessive lateral runout or thickness variation.
• Out of round bra...

Brake System Bleed

• Ensure brake fluid reservoir is full.
• Bleed anti-lock brake system in the following sequence:
• Master cylinder.
• HCU valve body, opening one line at a time.
• Right rear wheel.
• Left rear wheel.
• Right front wheel.
• Left front wheel.
• Attach bleeder hose to bleeder fitting, then immerse hose in a suitable glass container.
• Loosen bleeder screw ^1/2 turn, then depress and hold brake pedal until pedal reaches floor.
• Tighten bleeder fitting only after pedal has bottomed at floor, then release pedal.
• Repeat preceding steps until fluid entering container is free of bubbles. Check brake f...