Oldsmobile 12541500 Pipe,Brake (Bulk Tubing 5/16" 8Mm)

Approximately every six months, raise the vehicle and securely support it on jackstands to inspect the flexible hoses connecting the steel brake lines to the front and rear brake assemblies. Look for cracks, chafing, leaks, blisters, or any damage. Thoroughly inspect the hoses using a light and mirror if needed, and replace any hose exhibiting the mentioned conditions. Replacement of Front Brake Hose: Disconnect the brake line from the hose fitting using a back-up wrench, then remove the U-clip from the hose fitting. Remove the hose from the bracket, and at the caliper end, remove the bolt from the fitting block along with the copper gaskets. When installing the new hose, use new copper gaskets and lubricate bolt threads with clean brake fluid before attaching. Attach the hose to the caliper with the fitting flange engaged in the caliper locating ledge, and install the female fitting in the hose bracket without twisting the hose. Reinstall the U-clip retaining the female fitting to the frame bracket and reattach the brake line to the hose fitting using a back-up wrench. Ensure there are no kinks in the hose and check for contact with suspension parts during extreme wheel turns. Rear Brake Hose: Disconnect the hose at both ends using a back-up wrench, remove the U-clips, and separate the female fittings from the brackets. Unbolt the hose retaining clip and remove the hose. Install the female ends in the frame brackets without twisting the hose, then reinstall the U-clips to retain the female end to the bracket. Attach the steel line fittings to the female fittings using a back-up wrench, ensuring the bracket isn't loosened during hose installation. Fill the master cylinder reservoir and bleed the system. Metal Brake Lines: When replacing brake lines, use prefabricated brake lines or obtain the recommended steel tubing and fittings to match the line to be replaced. Cut the new tubing to the correct length, flare the ends with an ISO flaring tool, and carefully bend the line to the proper shape if necessary. Install the new line securely supported in the brackets with sufficient clearance from moving or hot components. After installation, check the master cylinder fluid level, bleed the brake system, and thoroughly test the brakes before driving in traffic.

Periodically examine all hydraulic brake lines, both rigid and flexible, for rusting, chafing, and general deterioration, while also checking the security of the connections. If hoses or lines must be disconnected, extensive loss of fluid can be avoided by taping over the vent holes in the master cylinder fluid reservoir cap first. For drum brakes, use a back-up wrench on the hose fitting to unscrew the connector, remove the U-shaped retainer, withdraw the hose fitting from the support bracket, turn it out of the wheel cylinder, and remove the copper gasket. When installing, use a new copper gasket, moisten the screw threads with brake fluid, and torque-tighten to the wheel cylinder. With the weight on the suspension and the wheels straight ahead, insert the female end of the hose through the support bracket, allow it to seek its own position without kinking, then install the U-shaped retainer and secure the hose in the bracket. Turn the wheels from lock-to-lock to ensure that the hose does not contact other parts, repositioning the female end if necessary. Place the tubular steel connector in the hose fitting and torque tighten using a back-up wrench. After removing the tape from the master cylinder reservoir, top up with new brake fluid and bleed the system. For disc brakes, to disconnect a rigid line from a flexible hose, unscrew the connector from the hose end fitting located at the support brackets, holding the flexible hose and fitting still with an open-ended wrench. To remove the flexible hose, extract the retainer and pull the hose from the support bracket, then remove the hose to caliper bolt, the center connector, and the hose. Installation is a reversal of removal, always using new copper gaskets with the flexible hose end fittings and allowing the flexible hose to assume its natural curvature without securing it in a twisted or kinked position. Rigid lines that need replacement can be purchased at many auto parts stores; take the old line for a pattern, ensuring they are fitted with the correct connectors and that the ends are double-flared.

At least twice a year, inspect the flexible hydraulic brake hoses connecting the steel brake lines with the front and rear brake calipers for any signs of cracks, chafing, leaks, blisters, or road damage, as these hoses are crucial and susceptible components of the brake system. A thorough inspection using a light and mirror is recommended, and any hose showing damage should be replaced. For the front brake hose, clean the hose and fittings, remove the rivet securing the brake hose clip to the upper A-arm, take off the U-clip from the female fitting at the support bracket, and detach the hose from the caliper, discarding the copper washers. When installing, use new copper washers, lubricate the bolt threads with clean brake fluid, attach the hose to the caliper without twisting, install the U-clip, rivet the brake hose clip back, and ensure there are no kinks in the hose while checking for contact with the suspension during wheel turns. For the rear brake hose, disconnect it from the brake line at the mounting bracket, remove the U-clip, detach the bracket from the strut, and take off the bolt securing the fitting block to the caliper. When installing, attach the hose assembly to the brake line, secure the spring clip, connect the fitting block to the caliper with new copper washers, and reattach the brake line to the strut, ensuring the brake fluid level is maintained and the system is bled. For steel brake lines, various lengths of prefabricated brake line are available, which can be bent by hand or with a tubing bender; if not available, obtain the recommended steel tubing and fittings, measure the old line for length, cut the new tubing with extra length for double-flaring, install fittings, and double-flare the ends before bending to match the old line's shape.

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 above defects are found, the hose should be replaced with a new one. To replace the hose, start by cleaning any dirt away from the ends of the hose and disconnecting the brake line from the hose fitting, being careful not to bend the frame bracket or line. If necessary, soak the connections with penetrating oil. Remove the U-clip from the female fitting at the bracket and remove the hose from the bracket. Disconnect the hose from the caliper, discarding the copper washers on either side of the fitting. Attach the new brake hose to the caliper using new copper washers. Pass the female fitting through the frame or frame bracket, installing it with the least amount of twist in the hose. Install the U-clip in the female fitting at the frame bracket. Attach the brake line to the hose fitting using a back-up wrench on the fitting. Carefully check to ensure that the suspension or steering components do not make contact with the hose, and have an assistant push down on the vehicle and turn the steering wheel lock-to-lock during inspection. Afterward, bleed the brake system. When replacing brake lines, always use the correct parts and avoid using copper tubing. Purchase steel brake lines, preferably prefabricated ones with the tube ends already flared and fittings installed. Ensure that the new line is well supported in the brackets and has plenty of clearance between moving or hot components. After installation, check the master cylinder fluid level and add fluid as necessary. Finally, bleed the brake system and test the brakes carefully before placing the vehicle into normal operation.

Bend the pipe to match the old pipe allowing a clearance of at least 0.75 in. (19mm) from all moving parts and vibrations.

To remove the hose, raise and support the vehicle, remove the through-bolt that fastens the hose to the caliper, remove any clips retaining the connection at the frame, and unscrew the flare fitting located on the pipe running along the frame.

Brake hoses are rubber covered flex hoses designed to transmit brake pressure from the metal tubes running along the frame to the calipers in front and wheel cylinders in the rear.

Clamp the flaring tool body in a vise carefully, select the correct size collet, then the forming mandrel for the pipe size use, insert the proper forming mandrel into the tool body.

Every six months, the rubber hoses should be inspected for any cracks, chafing, leaks, blisters, or other damage. This inspection should be thorough, and any hose exhibiting these conditions should be replaced.

By passing the female fitting through the frame or frame bracket and installing it carefully.

Carefully avoid bending the frame bracket or line, ensure that the suspension or steering components do not make contact with the hose, and have an assistant push down on the vehicle and turn the steering wheel lock-to-lock during inspection.

The hose should be replaced with a new one.

Cracks, chafing, leaks, blisters, or any other damage.

Remove the bolt from the fitting block and take out the hose along with the copper gaskets.

Carefully avoid bending the frame bracket or line, ensure that the suspension or steering components do not make contact with the hose, and have an assistant push down on the vehicle and turn the steering wheel lock-to-lock during inspection.

When replacing metal brake lines:Use the correct steel brake lines and avoid using copper tubing.

Carefully bend the line to the proper shape using a tube bender, ensuring it is securely supported in the brackets with clearance from moving or hot components.