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VIEW SOLUTIONS TO COMMON PROBLEMS
Brake Lines and Hoses
Bearings & Seals
Flushing the System
The Parking Brake
Select a part to view solution for common problems associated with the item.
Operation: Brake pads provide the friction material that when forced against the friction surface of the rotor stops the vehicle. Advice: Check the old brake pads for uneven wear. Uneven wear is an indication of loose or worn brake hardware or a sticking caliper.
Operation: The brake rotor provides the rotating friction surface for the brake pads to interact with in stopping the vehicle. Advice: Check the friction surface for uneven wear, grooves or small stress cracks caused by excess heat. Uneven wear is an indication of lose or worn brake hardware. Grooves in the friction surface are an indication of brake pads that have worn down to the metal rivets or brake pad framework, or of debris lodged between the brake pad and rotor, possibly broken brake hardware. As long as the damage is not too severe, uneven wear can be corrected by resurfacing the rotor. Check to make sure that the rotor is within specifications before and after the resurfacing. A rotor with heat stress cracks should be replaced. Recommendations: Resurface or replace the rotors.
Operation: The caliper converts the hydraulic pressure sent from the master cylinder into the mechanical force that pushes the brake pads into contact with the brake rotor to stop the vehicle. Advice: Check for moisture anywhere around the caliper. Moisture is an indication of a leaking caliper. A leaking caliper should be either rebuilt or replaced. If a caliper is allowed to leak brake fluid onto the new pads, it will ruin the new pads causing the brakes to grab and emit a growling or rumbling noise when applied. Recommendations: Rebuild or replace leaking calipers.
Operation: The brake lines act as a conduit for the brake fluid, supplying each wheel with the hydraulic action necessary for brake operation. The system is made up predominantly with metal brake lines. Flexible hoses are used at the wheels to accomadate the movement of suspension and steering. Advice: Check metal brake lines for signs of corrosion, physical damage or leakage. Check flexible brake hoses for splits, cracking or signs of leakage. The brake lines are connected to the various brake components with hollow fittings called flare nuts or line fittings. Because flare nuts are hollow they are susceptible to damage if a normal open ended wrench is used to remove them. Flare nut wrenches, sometimes called line wrenches are special open ended wrenches designed to slide over the brake line and still provide maximum grip on all sides of the fitting. Apply a generous spray of penetrating oil to the threads of the fittings and allow it to soak in before loosening the fittings. Recommendations: Flare Nut Wrench set Penetrating spray
Operation: Brake hardware is a term used for all of the springs, clips, guide pins and other misc. pieces that hold the brake pads and calipers in place and guide their movement during brake application. Advice: Check for corroded, bent, worn out or broken springs, guide pins or clips. Damaged or worn out brake hardware can cause uneven wear on the new brake pads. To ensure the best results from your brake job, the brake hardware should be replaced with the new brake pads. Recommendations: Replace Brake hardware
Operation: The wheel bearings support the weight of the vehicle and allow the wheels to spin freely. Advice: All wheels will have some sort of bearing and a seal to hold in lubricant and keep out dirt. Some bearings are sealed in a hub assembly or pressed into an axle housing and can only be serviced by replacing them. Others such as tapered roller bearings can be cleaned inspected and repacked with grease. Use a can of spray brake cleaner to remove the old grease. Check the integrity of the cage holding the rollers in place. A loose wobbly cage is an indication of wear. Check the rollers for discoloration. Discoloration is an indication that the bearing has been subjected to excess heat and should be replaced. Always install a new race when replacing a bearing. Always install a new seal whenever servicing or replacing a bearing. Recommendations: Spray Brake cleaner Wheel bearing grease Wheel seal
Operation: Flushing the brake fluid removes old or contaminated brake fluid from the system replacing it with fresh brake fluid. Advice: Brake fluid is a hygroscopic fluid, which means that it is in its nature to absorb moisture from the air. Over time the amount of moisture accumulated will decrease the efficiency of the fluid to act hydraulically. Moisture in the brake fluid can also cause corrosion in the system. Brake fluid should be flushed every two years. Recommendations: Brake fluid
Operation: The parking brake on a rear disc brake system has a series of cables that when actuated from the driver's compartment forces the parking brake friction material on both rear wheels against the friction surface of the rotors to hold the vehicle in place. Advice: Some rear disc parking brakes use the rear disc pads to hold the vehicle stationary, and some have a separate system that resembles a drum brake system located in the center of the disc. Check the friction surfaces for uneven wear or grooves. Consult the vehicle repair guides for adjustment procedures. Recommendations: Repair guides