0379135 JOHNSON BEARING,Wrist pin

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 auxiliary engine braking devices 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 auxiliary engine brakes on your vehicle, refer to the information that is provided by the OEM of the vehicle. The antilock braking system (ABS) of this vehicle may interrupt the operation of the engine retarder (auxiliary engine brake) during the ABS actuation. The engine retarder is a compression brake, also referred to as an exhaust brake. For information on the operation of the ABS, refer to the literature that is provided by the OEM of the vehicle.The engine retarder provides auxiliary braking in order to slow the vehicle and control speed on grades, curves, or at any time when the 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 engine retarder results in reduced wear on brake linings and brake drums. It helps save the service brakes for emergency stopping requirements.An engine retarder generates the maximum retarding power at the engine's maximum rated rpm. As the engine rpm decreases, so does the engine retarder performance. For maximum available retarding, the operator should select a gear which will provide the desired road speed at the highest allowable engine rpm.On long downhill grades, an operator should establish a "control s speed" The "control speed" is the speed at which the force that pushes the vehicle is equal to the retarding force that slows the vehicle, with little or no use of the service brake.To maximize the benefit of the engine retarder, the engine retarder should be used anytime that the operator wants to slow the vehicle. The engine retarder should be left in the ON position during all normal operating conditions.The operation of any vehicle under slippery conditions requires caution. This is also true when operating a vehicle engine retarder. As a general rule, start with the engine retarder OFF and ensure that the vehicle maintains control through natural retardation. Then activate the engine retarder at the lowest power setting and increase the power setting as the conditions allow.Operating the Engine Retarder
The engine retarder is controlled by a switch on the dashboard. Before starting the engine, ensure that the switch is in the OFF position.After the engine is started, turn the switch ON. The switch may stay ON during engine operation. The engine retarder will only activate when no fuel is supplied to the engine. The engine retarder will help to slow the vehicle when no pressure is applied to the throttle pedal or clutch pedal.The engine retarder may be programmed to one of three modes.* COAST* LATCH* MANUALThe COAST mode and the LATCH mode require the Cruise Control switch to be in the ON position. The COAST mode and the LATCH mode do not require the Cruise Control to be active. In the COAST mode or the LATCH mode, the engine retarder is activated by the service brake. Use of the service brake deactivates the Cruise Control, but does not turn the Cruise Control OFF.In the MANUAL mode, it is not necessary to depress the service brake in order to activate the engine retarder.If the Cruise Control ON/OFF switch is OFF, the engine retarder will activate regardless of the service brake.COAST Mode
If the engine retarder is programmed to COAST and the Cruise Control switch is ON, the engine retarder will activate when the service brake is depressed. In the COAST mode, the braking power is provided by both the service brake and the engine retarder.The engine retarder will deactivate when the service brake is released.LATCH Mode
If the engine retarder is programmed to LATCH and the Cruise Control switch is ON, the engine retarder will activate when the service brake is depressed.The engine retarder remains active (latched) when the service brake is released. The engine retarder remains active until the throttle pedal or the clutch pedal is depressed, or the engine speed drops below 900 rpm.MANUAL Mode
If the engine retarder is programmed to MANUAL, the engine retarder will activate regardless of the service brake or the Cruise Control switch position. The engine retarder will activate when no pressure is applied to the throttle pedal or clutch pedal.