TANK AND VALVE GROUP 3J3894 - Caterpillar

If your vehicle is equipped with an auxiliary brake, follow the instructions provided in the auxiliary brake owner's manual. Failure to follow the instructions during wet or slippery conditions could reduce vehicle control and result in personal injury or death.
Auxiliary brakes should not be used as a primary or service brake. The vehicle's service brake must be used in order to bring the vehicle to a complete stop.
Certain exhaust brakes are approved for use on these engines. Refer to the Truck Engine Application and Installation Guide or see your Caterpillar dealer for more information. For information on the specific exhaust brake that is installed on your vehicle, refer to the information that is provided by the OEM of the vehicle.The anti-lock brake system (ABS) of this vehicle may interrupt the operation of the auxiliary engine brake during the actuation of the ABS. Compression brakes and exhaust brakes are typical examples of auxiliary engine brakes. For information on the operation of the ABS, refer to the literature that is provided by the OEM of the vehicle.The exhaust brake may be used as a warm up device for the engine in order to add parasitic load to the engine. This parasitic load will help maintain normal engine operating temperatures. The engine will ramp to the programmed Warm Up Mode Idle Speed and the exhaust brake will be engaged when the engine is programmed to either "Warm Up Only" or "Exhaust Brake & Warm Up". Also, the switch for the exhaust brake must be in the ON position if this switch has been installed.Warm Up Mode will be disengaged when one of the following conditions occurs.
The engine is warmed up.
The service brake is depressed.
The clutch pedal is depressed. (Dependent on transmission style)
The switch for the exhaust retarder (Optional) is turned to the Off position.
The vehicle is in gear. (Optional neutral switch)
The throttle is depressed.
The vehicle speed is more than 1 km/h (1 mph).
The ECM detects excessive engine load.
The engine rpm is less than 500 rpm or more than 1450 rpm.The exhaust brake provides additional braking in order to slow the vehicle on grades and curves. The exhaust brake also helps to control the speed. The exhaust brake is useful when a reduction of speed is necessary, but a long application of the service brake is not desired. Controlling the slowing or downhill speed of a vehicle by using the exhaust brake results in reduced wear on brake linings and brake drums. A reduced wear on these components helps to save the service brakes for emergency stopping requirements.An exhaust brake generates the maximum retarding effect at the engine's maximum rated rpm. As the engine rpm decreases, the performance of the exhaust brake also decreases. For maximum available retarding, the operator should select a gear which will provide the desired road speed at the highest allowable engine rpm.To maximize the benefit of the exhaust brake, the exhaust brake should be used whenever the operator wants to slow the vehicle. The exhaust brake should