Brake Hose/Line: Description and Operation

DESCRIPTION - BRAKE TUBES AND HOSES
The chassis brake tubes are steel with a corrosion resistant coating applied to the external surfaces. The flex hoses are made of reinforced rubber.





All available brake systems on this vehicle use the same type of brake line fittings and tubing flares. The brake line fittings used are double-wall ISO style tubing flares and fittings at all tubing joint locations. Only the outlets of the proportioning valves and the rear flex hoses threading into them have non-ISO style flares (ABS and early production Non-ABS vehicles only). They utilize double-inverted style flares. Refer to for specific joint locations and tube fitting size.

Brake hose connections at disc brake calipers are made using banjo fittings permanently attached to the end of the hose. Banjo bolts with internal passageways for fluid flow connect the hose to the caliper. Copper washers are used to seal the banjo fittings and bolts at the caliper and must be replaced when the connection is broken.

OPERATION - BRAKE TUBES AND HOSES
The purpose of the chassis brake tubes and flex hoses is to transfer the pressurized brake fluid developed by the master cylinder to the wheel brakes of the vehicle. The flex hoses are made of rubber to allow for the movement of the vehicle's steering and suspension.