LEVER A. 4J1419 - Caterpillar

Illustration 1 g00733925
The retarder control is located to the right side of the steering column. The retarder control has four positions:OFF - Move the retarder control forward toward the instrument panel in order to disengage the retarder.LOW - Pull the retarder control to the first position in order to obtain minimum retarder engagement.MEDIUM - Pull the retarder control to the second position in order to obtain medium retarder engagement.HIGH - Pull the retarder control to the third position in order to obtain maximum retarder engagement.The retarder indicator will be illuminated when the retarder is engaged.The effectiveness of retardation depends on the load in the body, the grade of the slope, and the gear which is selected. The most effective retardation occurs at an engine speed of 2000 100 rpm.Check the oil temperature of the torque converter while the retarder is engaged. When you drive the machine down a grade and the retarder is applied, overheating of the torque converter oil can result when the machine is in high gear range. If the threat of overheating torque converter oil is present, select a lower gear in order to prevent overheating of the torque converter oil.Do not change gear while the retarder is engaged. If the transmission speed is within 50 rpm of making an upshift, a Warning Category 2 from the Caterpillar Monitoring System will be given.Refer to Systems Operation, RENR5145, "Caterpillar Monitoring System", "Warning Operation" .The retarder disengages during an upshift. The retarder engages again when the upshift is complete. The retarder is less effective when a higher gear is engaged. To prevent an upshift, increase the amount of retarder engagement. If the retarder is already at maximum engagement, use the service brakes to slow the machine.The retarder also has a throttle deactivated retarding feature. The throttle deactivated retarding feature can be enabled or disabled with the ET.When the throttle deactivated retarding feature is ENABLED, the retarder will automatically disengage when the throttle is depressed and the retarder lever is in LOW, MEDIUM, or HIGH. When the machine is being retarded, the throttle deactivated retarding feature will prevent the operator from fueling the engine.When throttle deactivated retarding is DISABLED, the retarder will follow the retarder lever command regardless of the throttle position.The value of the throttle deactivated retarding feature is programmed at the factory to be ENABLED. Use the configuration screen in the ET in order to change the throttle deactivated retarding enable status.