PLATE & FILM GP 1258731 - Caterpillar

Changing Speed and Direction
Transmission Range Selector
First, second and reverse are torque converter driven. Third through eighth speeds are direct drive.First and reverse must be selected manually. The transmission will shift automatically between second and any other speed selected in the automatic range (third through eighth).Manual shifting during loading, hauling or spreading is not necessary or recommended. Select the highest usable speed for job conditions.However, if more wheel torque is required, manually shift to first speed.
First speed is not protected by downshift inhibitor. Engine overspeed could result if the transmission is shifted into first speed at over 8 kph (5 mph).The machine must be stopped and the engine must be running at low idle when changing direction.
For more information on the most efficient use of the transmission, see "Operating Techniques for the Caterpillar Eight Speed Transmission," Caterpillar Form Number SEBU5459.Transmission Hold Pedal
Use the transmission hold pedal to prevent undesired shifting of the transmission.Apply the transmission hold to prevent upshifts while loading or dumping.Slow the machine and depress the pedal, to hold the transmission in low gear, before starting down a grade.Hold the transmission in a lower gear to increase engine rpm when approaching an upgrade.In rough terrain it prevents continuous upshifting and downshifting.The transmission hold pedal may be used to skip gears for operator comfort, when slowing to enter the cut or fill area. Skip only one gear at a time. Do not skip gears below 5th.To skip a gear, push down the pedal. Allow the ground speed to slow enough to cause the transmission to downshift two times. Release the pedal.Hydraulic Retarder
Use the retarder to slow the machine, or prevent engine overspeed.
The retarder will not completely stop the machine.Keep engine rpm under 2300.
Use the retarder on downgrades to prevent engine overspeed. It also helps prevent excessive heating and wear of brakes.Use the retarder when entering a cut or fill area to slow the machine. This will allow the transmission to downshift. When the desired speed is reached, depress the transmission hold pedal.Use the retarder to help stop the machine, to save brakes and help prevent brake overheating.
If continuous overheating of retarder oil is a problem, use a lower transmission speed.
Gauges and Indicators
Stop the machine immediately if the low air system warning light (1) goes on, the low air warning horn sounds, or the air pressure gauge (2) is in the red range.Have repairs made if air pressure will not build up. Stop the machine and stop the engine if the engine oil pressure gauge drops into the red range. Have repairs made. If the engine coolant temperature gauge reaches the red range, stop the operation.If no coolant leak is apparent, operate the engine at