Caution: Always use double-flared steel brake pipe when replacing brake pipes. The use of any other pipe is not recommended and may cause brake system failure. Carefully route and retain replacement brake pipes. Always use the correct fasteners and the original location for replacement brake pipes. Failure to properly route and retain brake pipes may cause damage to the brake pipes and lead to brake system failure.

1. Clean the dirt, the grease, and other foreign material from the fittings at both ends.



2. Remove the brake pipe fitting (front brake shown).
3. Remove the retainer if also disconnecting the brake hose. Refer to Front Brake Hose Replacement and Rear Brake Hose Replacement .

Tools Required

1. Connect the brake hose retainer, if required. Refer to Front Brake Hose Replacement and Rear Brake Hose Replacement .
2. When replacing brake pipe, use the J 23530 for a double flare brake pipe replacement tool. For ISO flares, use the J 29803-A .




Notice: Use the correct fastener in the correct location. Replacement fasteners must be the correct part number for that application. Fasteners requiring replacement or fasteners requiring the use of thread locking compound or sealant are identified in the service procedure. Do not use paints, lubricants, or corrosion inhibitors on fasteners or fastener joint surfaces unless specified. These coatings affect fastener torque and joint clamping force and may damage the fastener. Use the correct tightening sequence and specifications when installing fasteners in order to avoid damage to parts and systems.

3. Install the brake pipe fitting (rear brake pipe fitting to spacer connection near fuel filter shown as an example).

Tighten
Tighten brake pipe fittings to 24 N·m (18 lb ft).

4. Maintain a 6 mm (1/4 in) clearance when brake pipes run parallel to each other.