6. LOW AIR PRESSURE WARNING LIGHT. This light activates simultaneously with the warning buzzer. If
traveling, immediate stop should be made to avoid automatic application of spring brakes.
7. SPEEDOMETER AND ODOMETER. Indicates road speed and total mileage vehicle has traveled.
8. LIGHT BEAM INDICATOR LIGHT. Indicates whether lights are on LOW or HIGH beam.
9. DIFFERENTIAL LOCK INDICATOR LIGHT. Indicates when the inter-axle differential control is in the
LOCK position.
10. INTER-AXLE DIFFERENTIAL CONTROL LEVER. When positioned to LOCK engages (LOCK OUT) the
inter-axle differential.
11. CAB LIGHT SWITCH. Controls overhead light.
12. HOURMETER. Provides a digital readout of engine operating hours. Controlled by a pressure switch in
the engine oil system.
13. IGNITION ON INDICATOR LIGHT. Indicates that the ignition switch is positioned to ON or ACC.
14. PUSH-PULL PARKING BRAKE CONTROL. Pulling control button out releases air in the spring loaded
automatic brake units on the rear tandem axles. Pushing button in compresses the springs, releasing the
brakes. Do NOT use to stop vehicle except in an emergency as a severe sudden stop will occur.
15. DEFROSTER PUSH-PULL CONTROL. Pulling the control allows air from the heater to flow to the
windshield for defrost. Pushing the control allows air to flow out of the heater vents into the cab.
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