For 1990-2009 cars

### Removal Procedure

1. Apply the parking brake.
2. Block the wheels.
3. Exhaust the air from the lines. Refer to Draining Reservoirs .
4. Remove the air line.
5. Unscrew the nipple from the socket and the flexible hose.
6. Disassemble the flexible hose. Turn the hose clockwise in order to unscrew the hose from the socket.
7. Clean the nipple and the socket with a clean cloth.
8. Inspect the nipple and the socket for the following conditions:

• | Nicks

• | Burrs

• | Wear Spots

9. Replace any damaged components.
10. Use a fine tooth hacksaw or cutting wheel in order to cut the flexible hose squares the same length as the original part.
11. Assemble the flexible hose into the socket. Turn the hose counterclockwise in the socket until it bottoms; then back off the flexible hose 1/4 of a turn.
12. Lubricate the nipple threads with clean engine oil.
13. Assemble the nipple.

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.

14. Tighten the nipple.

Tighten
Tighten the nipple, leaving a 0.8 mm (0.03 in) clearance between the nipple hex and the socket.

### Installation Procedure

1. Install the air line.
2. Start the engine.
3. Charge the system air pressure to the governor cut-out point.
4. Check for leaks with a soap solution. No leakage is permissible.
5. Test the brakes for proper operation.
6. Remove the wheel blocks.