Transmission shift systems

Transmission shift systems

Table of contents

Automatic transmission - general . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 150 Selector positions of the 3-pushbutton switch panel . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 151 Selector positions of the 6-pushbutton switch panel . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 153

Transmission shift systems Automatic transmission - general

Automatic transmission - general

Danger.

Risk of accident. The bus is free to move with the transmission in neutral “N” and the brakes released. Apply the parking brake and press pushbutton N whenever the bus is parked or work is to be carried out on the bus with the engine running. Do not shift down on a slippery road surface (risk of skidding). Press pushbutton N when there is a risk of sliding and skidding. For a brief stop, such as at a bus stop or traffic lights, keep the gearshift unit in its current position and bring the bus to a halt using the service brake or bus stop brake. Shift down in good time on long uphill or downhill gradients, especially when under a big load.

Note:

Changing gear with the automatic transmission: the engine can only be started when the transmission is switched to the neutral position N. The individual gears are changed automatically in response to the position of the switches, the road speed and the accelerator pedal position.

Note:

Driving away: apply the service brake. Select the gearshift position by pressing a pushbutton with the engine at idling speed (accelerator pedal not depressed). Do not release the brake until the bus begins to pull away. There is otherwise a risk of the bus pulling away too soon (bus creeps). On upwards slopes release the brake and simultaneously depress the accelerator pedal.

Note:

Accelerator pedal positions: little throttle for low acceleration and sooner upshifts. More throttle for high acceleration and later upshifts. Kickdown (depressing the accelerator pedal to the stop beyond the full throttle position) for maximum acceleration. The transmission shifts down to a lower gear if the road speed is below the maximum speed for the next gear down. The transmission shifts up when the engine is running at rated speed.