FREE REPAIR MANUALS & LABOR GUIDES 1982-2013 Vehicles
Courtesy of Operation CHARM: Car repair manuals for everyone.

45-Degree Double Flare

WARNING:
^ COPPER TUBING SHOULD NOT BE USED IN THE HYDRAULIC SYSTEM. USE ONLY SAE J526 OR JS27 STEEL TUBING, OR EQUIVALENT. TUBING OTHER THAN THE PROPER STEEL TUBES MAY BURST AND CAUSE BRAKE FAILURE.
^ WHEN BENDING BRAKE TUBING TO FIT UNDERBODY, BE CAREFUL NOT TO KINK OR CRACK THE TUBE.


NOTE:
^ If a section of the brake tubing becomes damaged, the entire section should be replaced with tubing of the same type, size, shape and length.
^ The outside diameter of the tube is used to specify size.
^ Certain brake tube bundles are serviced as complete assemblies. If not serviced, the following service procedure should be used.
^ The tube nuts can be reused if they are not damaged.

TUBE FLARES
^ Refer to Application and ID to determine the type of flare used.
^ All the tube end connections at the brake master cylinder are ISO flare with metric tube nuts. Refer to ISO Metric Flare for service. ISO Metric Flare
^ The ISO flare and SAE 90 degree double flare have been in common usage. A new 120 degree double flare is used with an ISO flare as part of an in-line connection to the RH front brake tube.
^ If a section of brake tube is damaged, the entire section should be replaced with a tube of the same type, size, shape, and length.
^ When bending tubing to fit the underbody or rear suspension contours, always use a suitable tube bender and be careful not to kink or crack the tube.
^ Double wall steel tubing is used throughout the brake hydraulic system.
^ All brake tube fittings must be properly double flared to provide strong leakproof connections.

BRAKE TUBE REPLACEMENT
1. Obtain the recommended tube and steel fitting of the correct size.
2. Use a tubing cutter to cut the tubing to length. Clean burrs after cutting.

NOTE:
^ Make sure the fittings are installed and oriented correctly before flaring both ends of the tube.
^ Follow flaring instructions included with the flaring tool kit used.

3. Use brake line flaring tool to double flare the ends of the tube. Follow the instructions included with the tool.
4. Bend the tube to the necessary contours and connect. Clearance of 19 mm (0.75 inch) must be maintained between the tube, metal edges and all moving or vibrating parts.
5. Clean brake tubing by flushing with clean brake fluid before installation.
6. Make sure that all clips, brackets and shields are in place upon completion of brake line replacement.