Operation - Section 3 OM3024.1 8/00 Page 3-6 Operating Instructions Auxiliary Brake 6. Check gauges, warning lights and instruments before moving the truck to insure proper system operation and proper instrument functioning. Give special attention to braking and steering circuit warning lights. If warning lights come on, shut down the engine immediately and determine the cause. 5. Check operation of the auxiliary brake: a. Press the auxiliary brake switch (2, Figure 3-1) to select the ON (applied) position. Verify inter- nal red lamp and service brake lamp turn on. b. Move transmission range selector to the 5 position and gradually increase engine speed to full throttle. Truck must not move.
7. Insure headlights, worklights and taillights are in proper working order. Good visibility may prevent an accident. Check operation of windshield wiper and washer. 8. When truck body is in dump position, do not allow anyone beneath it, unless body-up retaining de- vice is in place. If truck moves, notify maintenance personnel to immediately repair brakes. DO NOT operate truck until auxiliary brake is fully operational. 9. Do not use the fire extinguisher for any purpose other than putting out a fire! If extinguisher is discharged, report the occurrence so the used unit can be refilled or replaced. c. Reduce engine speed to low idle. Place range selector lever in N position.
Press auxiliary brake switch to turn OFF. Verify red indicator lamp and service brake lamp are off. 10. Do not allow unauthorized personnel to ride in the truck. Do not allow anyone to ride on the ladder or on the deck of the truck. 11. Do not leave truck unattended while engine is running. Shutdown engine before leaving cab. FIGURE 3-2. CONSOLE CONTROLS 1. Center Console 2. Transmission Range Selector 3. Parking Brake Switch 4. Brake Lock Switch