Air Brake Application Valve Replacement for Isuzu Isuzu MD Steel Tilt (F Model) 1998

1. Block the wheels.
2. Tilt the cab. Refer to Cab Tilting in General Information.
3. Drain all of the air reservoirs. Refer to Draining Reservoirs .
4. Lift the inner fender panel.
5. Mark the air lines and connections in order to aid in installation.
6. Remove the wiring harness connector from the stoplamp switch.
7. Remove the air lines from the dual application valve.

A double check valve and lines fittings are attached to the dual application valve. You can remove these fittings from the dual application valve or you can remove these fittings with the dual application valve as an assembly.




8. Remove the dual application valve mounting bolts.
9. Remove the dual application valve.
10. Inspect the air lines for the followings:

•

Damage

•

Kinks

•

Wear

11. Repair or replace the air lines as necessary.

1. Install the dual application valve.

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.

2. Install the dual application valve mounting bolts.

Tighten
Tighten the dual application mounting valves to 40 N·m (29 lb ft).




3. Install the air lines to the dual application valve.
4. Check the brake pedal end play. Refer to Brake Pedal Replacement.
5. Perform the air leakage test. Refer to Air Brake Application Valve Leakage Test .
6. Perform the operational test. Refer to Air Brake Application Valve Operational Check .