Engine Brake Actuator Control Valve Replacement Valve

Caution: Make sure actuator is not pressurized before performing any service procedures. The actuator assembly, when pressurized, exerts sufficient force to cause personal injury. Refer to Air Brakes to depressurize the system before performing any service procedures.

1. Inspect the exhaust brake for foreign objects that are trapped between the following components:

•	The lever and the stop peg

•	The actuator and the bracket

2. Inspect the following components for tightness:

•	The two mounting bracket bolts

•	The stop peg

•	The clamp rings

3. Inspect the following components for dirt:

•	The actuator push rod end

•	The lip seal

•	The breather

•

The pivot




4. Perform the following actions simultaneously:

•	Hold the actuator rod across the flats.

•	Slacken the locknut.

5. Remove the inlet hose elbow.
6. Remove the following components:

•	The circlip

•	The washer

7. Remove the actuator from the fixed pivot.
8. Unthread the actuator rod from the ball joint in order to remove the actuator rod.
9. Inspect the condition of the actuator sleeve.

Replace the actuator sleeve, if necessary.

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.

1. Thread the locknut onto the actuator rod.

Tighten
Tighten the actuator rod locknut to 14 N·m (10 lb ft).

2. Install the end of the actuator rod into the ball joint.
3. Slide the actuator over the pivot pin.
4. Install the washer and the circlip.

Ensure that the circlip is properly seated.

5. Install the inlet hose elbow.

Tighten
Tighten the inlet hose elbow to 20 N·m (14 lb ft).

6. Verify that the following conditions exist:

•	The actuator rod is properly adjusted.

•	The butterfly valve lever contacts the stop peg when the butterfly valve lever is in the fully open position.

•	The butterfly valve lever contacts the stop peg when the butterfly valve lever is in the fully closed position.

Engine Brake Actuator Control Valve Replacement Actuator Sleeve

1. Remove the circlip and the washer.
2. Slide the actuator off of the following components:

•	The actuator sleeve

•	The pivot pin

3. Remove the actuator sleeve.
4. Remove the washer.

1. Install the washer over the pivot pin.
2. Install a new actuator sleeve into the actuator.
3. Slide the actuator and the sleeve onto the pivot pin.
4. Install the washer and the circlip. Ensure that the washer is properly seated.