OM3216 3/10 Operator Cab and Controls - Section 32 Page 32-3 Turn Signal Operation RETARDER CONTROL LEVER Retarder control lever (6, Figure 32-2) is mounted on the right side of the steering column. It can be used to modulate the full range of retarding/braking effort being applied to both the front and rear oil disc brakes. Any application of the retarder lever will cause an indicator light to illuminate in the center instrument panel Refer to Instrument Panel And Indi- cators later in this chapter. Move the lever upward to sig- nal a right turn. An indicator in the top, center of the instrument panel will illu- minate to indicate turn direction selected.
Refer to Instrument Panel and Indicator Lights in this section. a. When the lever is rotated to the full "up" (counterclockwise) position, it is in the OFF/ NO RETARD position. Move the lever downward to signal a left turn. b. When the lever is rotated "downward" (clock- wise), it is in the ON/RETARD position. The ON position encompasses a full range of motion that allows a variable retarding effort depending on the position of the lever. As the lever is rotated further clockwise, more retarding effort will be applied. NOTE: The turn signal does not automatically cancel after the turn has been completed. The turn signal lever must be manually returned to the neutral position.
High Beam Headlight Operation c. For long downhill hauls, the lever may be positioned anywhere to provide the desired retarding effort. The lever will remain where it is positioned until moved. Refer to Retarder Operation in the previous section for cau- tions when using the retarder on a downhill grade. Pulling the lever inward (toward the rear of the cab) changes the headlights to high beam. When the high beams are selected, the indi- cator in the top center of the instrument panel will illumi- nate. Moving the switch back to the original posi- tion will return the headlights to low beam.
Windshield Wiper Operation When retarding is completed, and acceleration is resumed, return the lever to the full "up" ( OFF/NO RETARD ) position, to prevent rapid wear to brake discs and/or overheating of the brake cooling system. Windshield Wipers OFF Intermittent - Long Delay Intermittent -Medium Delay The retarder lever and foot-operated service brake pedal can be used simultaneously or independently. The Retard Control Module (RCM) will determine which device is requesting the most retarding/braking effort and apply that amount. Intermittent -Short Delay Low Speed High Speed Depressing the button at the end of the lever will activate the windshield washer. NOTE:
The wipers will not come on automatically when activating the washer. This must be done manually.