GMC 84286063 Hose Assembly, Front Brake

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About every six months, it is important to inspect the flexible hoses that connect the steel brake lines with the front and rear brake assemblies for any cracks, chafing, leaks, blisters, or other damage. This inspection should be done with the vehicle raised and securely placed on jackstands, using a light and mirror for a thorough check. If any of the hoses exhibit any of the mentioned defects, they should be replaced with new ones. To disconnect a brake hose from the brake line, the metal tube nut should be unscrewed with a flare nut wrench, and the U-clip should be removed from the female fitting at the bracket. The hose can then be removed from the bracket. When disconnecting the hose from the caliper, the sealing washers on either side of the fitting should be discarded, and new sealing washers should be used when attaching the new brake hose to the caliper. To reattach a brake hose to the metal line, the end of the hose should be inserted through the frame bracket, ensuring that the hose isn't twisted, and the metal line should be attached by tightening the tube nut fitting securely. The clip should be installed at the frame bracket. It is important to check that the suspension or steering components do not make contact with the hose, and this can be done by having an assistant push down on the vehicle and turn the steering wheel lock-to-lock during inspection. Finally, the brake system should be bled after completing the hose replacement. When replacing brake lines, it is crucial to use the correct parts and avoid using copper tubing. Steel brake lines can be purchased, and prefabricated brake lines with flared tube ends and fittings already installed are available at auto parts stores and dealer parts departments. These lines can be bent to the proper shapes using a tubing bender. During installation, it is important to ensure that the new line is well supported in the brackets and has sufficient clearance between moving or hot components. After installation, the master cylinder fluid level should be checked and fluid should be added as necessary. The brake system should be bled and the brakes should be carefully tested before the vehicle is placed into normal operation.

The inspection should be done with the vehicle raised and securely placed on jackstands, using a light and mirror for a thorough check. If any of the hoses exhibit any of the mentioned defects, they should be replaced with new ones.