OM3223 Operation - Section 32 Operator Cab and Controls Page 32-1 OPERATOR CAB AND CONTROLS FIGURE 32-1. CAB INTERIOR - OPERATOR VIEW 1. Steering Wheel 2. Service Brake Pedal 3. Retarder Pedal 4. Throttle / Accelerator 5. Heater / Air Conditioner Vents 6. Heater / Air Conditioner Controls 7. Instrument Panel 8. Grade / Speed Chart 9. Radio Speakers 10. Warning Alarm Buzzer 11. Radio, AM/FM Stereo, Cassette 12. Warning Lights Dimmer Control 13. Warning / Status Indicator Lights 14. Air Cleaner Vacuum Gauges 15. Windshield Wipers