Operating Instructions - Section 30 7/09 OM3050 Page 30-6 ENGINE START-UP c. After the engine has started, place the rest switch in the OFF position to enable the drive system. Refer to the discussion on the rest switch in Section 32, Operator Cab Controls. NOTE: In cold ambient conditions and when the engine is cold, the engine rpm will not increase above low idle speed until the engine controller determines it is safe to do so. This time delay will vary from 30 seconds to 11 minutes which allows the coolant and engine oil to warm up. A warning light will also be illuminated indicating that the engine is too cold for truck operation.
Never attempt to start the engine by shorting across the starter terminals. This may cause fire, or serious injury or death to anyone in the machine’s path. Start the engine from the operator’s seat only. If the truck is equipped with an auxiliary cold weather heater system, do not attempt to start the engine while the heaters are in operation. Damage to the coolant heaters will result! 1. Ensure that all personnel are clear of the truck before starting the engine. Always sound the horn as a warning before moving any controls. Starting fluid is extremely volatile and flammable! Use with extreme care. 2.
If the truck is in an enclosure, ensure that there is adequate ventilation before start-up. Exhaust fumes are dangerous! If truck is equipped with optional engine starting aid and ambient temperature is below 10°C (50°F), turn the key switch to the START position, and while cranking the engine, move the engine starting aid switch to the ON position for three seconds MAXI- MUM , then release engine starting aid. If the engine does not start, wait 15 seconds before repeating the procedure. 3. Ensure that the directional control lever is in PARK before starting. NOTE:
The park brake will always be applied whenever the directional control lever is in the park position and the truck is moving slower than 0.5 mph. 4. Press on the small red tab (to unlock the switch), then press on the top of the rest switch to put the drive system in the rest mode of operation. For more information, refer to Section 32, Operator Cab And Controls. NOTE: The electric cranking motors have a 30 second time limit. If the 30 second limit is reached, cranking will be prohibited for two minutes. After two minutes, cranking will be allowed. If the 30 second limit is reached seven consecutive times, the key switch must be turned to the OFF position.
This will allow the interface module to power down and reset, which requires seven minutes to complete. A warning will be displayed in the monitor panel if the 30 second time limit or seven attempts is reached. 5. The key switch is a three position (OFF, RUN, START) switch. When the switch is rotated one position clockwise, it is in the RUN position and all electrical circuits (except START) are acti- vated. a. Turn key switch to the RUN (not START) position. Verify that all indicator lights and gauges are functioning. b.
After the message “System Initializing” is displayed, rotate the key switch fully clockwise to the START position, and hold this position until the engine starts (see NOTE below). The START position is spring- loaded and will return to RUN when the key is released. NOTE: This truck is equipped with an engine prelube system. With this feature, a noticeable time delay may occur (while engine lube oil passages are being filled and pressurized) before engine cranking will begin.