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. The calipers and wheel cylinders are unsprung (ride along with the wheels) and the metal brake lines coming from the master cylinder are suspended by the vehicle's springs, along with the frame and body. The flex hoses permit the hydraulic force of the brake fluid to be transmitted to the wheels even though they are moving up and down in relation to the frame. The flexing can cause the hoses to wear, especially if the surface of a hose should rub against the frame or a suspension component. Inspect the hoses frequently and replace them if the rubber cover has cracked or deteriorated, or if there is any sign of leakage.
REMOVAL & INSTALLATION
See Figure 1
- Raise and support the vehicle.
- Remove the through-bolt that fastens the hose to the caliper. Remove the washers, noting that there is one on either side of the fitting at the caliper end of the hose. Disconnect the hose.
- If there is a clip retaining the connection at the frame, remove it. Now, unscrew the flare fitting located on the pipe running along the frame, using a backup wrench on the flats of the fitting at the end of the brake hose. Check for any other mounting brackets that would need removal. Remove the brake line.
- Replace the old hose with a new one, using new washers, then tighten the connection at the caliper.
- Install any retaining clips or mounting brackets back into position.
- Lower the vehicle, then bleed the brake system.