GM 19366774
Flex Hose, Front Driver Side

Use a J 45405 Tool Kit (J 45405) to repair brake pipes by ensuring you use double-walled steel brake line so the system does not fail. Before starting you need to examine the damaged brake pipe section and free it from retaining hardware when needed. Pick a recommended spot to cut the brake pipe and stay clear of bends or mounting points. Then measure the broken pipe span including the added flare dimension of 6.35 mm for 4.76 mm pipes and 9.50 mm for 6.35 mm pipes. You should use the J 45405 pipe cutter to make square cuts across the brake pipe then take away the divided piece. Choose the suitable brake pipe sizes and tube nuts before using the coating stripping tool and de-burring tool from J 45405 (J 45405) set to prepare the flaring end. Place tube nuts on both ends while clearing dirt from the brake pipe and J 45405 tool before unlatching the die clamping screw. Place the correct die set into the die cage before inserting the prepared pipe and operating the lever of J 45405 to create the flare. Ensure the flare matches 0.265-0.279 inch for a 3/16 inch pipe and 0.344-0.358 inch for a 1/4 inch pipe. Then adjust the new pipe with a bending tool when required and attach it correctly with unions and retainers followed by hydraulic brake system bleeding. Use a leak test to find any problems with brake pipe flares when the engine runs and brakes engage.

To stop brake system failure during replacements use only double-walled steel brake pipes while reinstalling fasteners at their normal positions. When breaking up a brake line install an identical replacement pipe made from double-walled steel. Use matching fittings of perfect size and type with flared ends that match the original parts. First look at the region that needs repair on the brake pipe. Disconnect it from retaining fixtures if required. Choose a place for the pipe section that avoids curves or mounting areas. Determine the replacement pipe length for brake lines by adding 6.35 mm for 4.76 mm tube, 9.50 mm for 6.35 mm tube, and 12.67 mm for 7.94 mm tube. Insert the pipe cutter from tool kit J 45405 to make a straight cut at the measured length of brake pipe. Pull off the sectioned piece afterwards to take tube nuts of the right size. Use the coating stripping tool (J 45405) to remove nylon from the end while needing both metal surfaces. Next apply the de-burring tool from (J 45405) to both inner and outer diameters. Clean the brake hose and tools in J 45405 before inserting and instaling tube fittings with brake hose sections. Prepare J 45405 dies for tube flaring operations. To produce the flare push the prepared pipe end into the die cage and secure it with the clamping screw then form the flare through both the forming mandrel and finishing cone. Check the flare dimensions after screw release to validate its proposed design. Accept 6.74-7.10 mm (3/16 in) size range for 4.76 mm pipe but expand to 8.57-9.27 mm (1/4 in) range for 6.35 mm tube before tightening to 10.42-10.79 mm limits (5/16 in) with 7.94 mm pipe diameter. Use the brake pipe bending tool to fix the new pipe when needed and keep flex space at 19 mm while placing it on appropriate unions then mounting retainers. Next bleed the hydraulic brake system and test for leaks by running the engine with brake activation.

Use J 45405 to work with brake pipes when following all safety instructions related to brake fluid chemicals and double-wall steel pipes for safe repairs. First inspect the defective brake pipe section then free it from the retainers when needed. Take a measurement of the replacement pipe length along with its bends and add flare components. Cut the final end at 90 degrees for smooth flaring. Cut the brake pipe using your J 45405 tool pipe cutter and remove the measured segment from the vehicle. Take brake pipe components that fit the application and use the J 45405 coating stripping and de-burring tools to prepare ends for flaring. Clean all parts of the brake pipe and J 45405 before proceeding with the flaring process. Place the ready pipe into the dies and secure them with the clamping screw while forming a flare through the mandrel action. Inspect the flare results and adjust new pipe shape if needed. Connect the pipe to the vehicle with correct unions after completing the flare process. After securing brake pipe onto retainers bleed the hydraulic brake system and test for leaks as you press brakes with running engine.

Clean any dirt or debris from the brake pipe fitting.

Remove the brake hose bracket bolt and the brake hose fitting bolt, discarding the 2 brake hose fitting gaskets.

Always use double-walled steel brake pipe to prevent brake system failure.

Use a backup wrench on the brake hose fitting to disconnect it and cap it to prevent brake fluid loss and contamination.

Bleed the hydraulic brake system, reinstall the tire and wheel assembly, and lower the vehicle.