Brake Lines & Hoses

Early Ford Broncos use 3/16-inch diameter steel brake lines throughout the system, with rubber flex hoses at each axle to accommodate suspension movement. The factory lines are typically single-wall steel and are prone to external rust corrosion over decades of use. Tom's Offroad carries replacement steel brake line sets as well as stainless steel armored lines for improved durability and a cleaner appearance.

Inspect early Bronco brake lines for external rust scale, pitting, soft spots in rubber flex hoses, and any signs of seepage at fittings. Run your hand along the lines with the truck cold and dry, any moisture, soft rubber, or rough pitting indicates the line should be replaced. Brake line failure can be sudden and catastrophic, so don't postpone replacement on questionable lines. Any origional rubber lines should be replaces as they have exceeded their normal operational life expectancy.

Stainless steel braided brake lines are a worthwhile upgrade for any early Bronco, offering improved corrosion resistance, reduced flex under pressure for a firmer pedal feel, and a longer service life than factory rubber hoses. They're especially beneficial for off-road trucks that encounter water, mud, and debris that accelerate rubber hose deterioration. Tom's Offroad carries stainless line kits for the early Bronco.

Generally, any lift on an early Bronco will requrire longer center brake hoses, front and rear. Always verify flex hose length at full droop with the new lift installed.

Bleed the brakes on an early Bronco starting from the wheel farthest from the master cylinder, typically the rear passenger side, and working toward the front driver side. Use a hand vacuum bleeder or have an assistant pump the pedal while you open and close the bleeder valve. Continue until no air bubbles emerge from the bleeder screw. Top up the master cylinder reservoir frequently throughout the process. A bench bleeding proceedure should be done anytime a new master cylinder is installed or the brake reservoirs run dry.