VALVE GP-ACCUMULATOR CHARGING 9U2886 - Caterpillar

Retarding Guidelines (Film)
Retarding performance charts provide an indication of the energy absorption capability of a given Motor grader power train on a specified continuous decline. Retarding performance charts serve to indicate the maximum transmission gear and maximum ground speed that should be used on a given grade. Retarding performance charts do not give an indication of the ability of the Motor Grader to stop. Retarding performance charts do not give an indication of the ability of the Motor Grader to remain stationary on the grade.
Illustration 1 g03733774The film for retarding guidelines is located inside the cab.
Maximum Operating Weight - The maximum operating weight of a Motor Grader .
Selected Gear - The selected gear for descending down a grade.
Percentage Grade - The percentage value of the grade.Retarding Information and Conditions
The retarding capabilities for each gear will vary depending on the following conditions: rolling resistance, load, tire size, and altitude. The retarder equipped is an engine compression brake which absorbs machine speed and uses it to compress and release air in the engine. Enabling the engine compression brake in order to allow the machine to automatically apply compression brake retarding as needed. The transmission must be in the FORWARD or REVERSE position in order for the compression brake to engage. Refer to Operation and Maintenance Manual, "Operator Controls - Compression Brake" for more information. The retarder will not completely stop the machine and the retarder will not hold the machine stationary. The compression brake will not function if the inching pedal is fully pressed. For maximum retarder performance on a given grade, selection of the proper gear is essential for effective operation of the retarder system. When starting down a known grade, refer to the film for retarding guidelines in order to select the proper maximum gear limit. Select the proper maximum gear limit on the transmission control before you start down the grade. For more information refer to Operation and Maintenance Manual, "Operator Controls - Transmission Control". When the film does not address the current conditions, use the following rule: the desired gear on a downgrade is two gears less than the gear that is required to go up the grade. If the machine builds up excessive speed during retarding, the engine can over speed and the transmission may upshift to protect the engine. If additional retarding is still needed, apply the service brake and choose a lower gear to maintain a constant vehicle speed. Continuous service brake use for retarding will damage the brake system.