OM3054 03/13 Operating Instructions - Section 30 Page 30-5 ENGINE START-UP Safety rules must be observed upon engine start-up. NOTE: The engine is equipped with an oil prelube system. A noticeable time delay will occur, while engine oil passages are being filled, before cranking motor engagement and engine cranking will begin. The colder the engine oil temperature, the longer the time delay will be. In addition, if the truck is also equipped with an engine starting aid for cold weather starting, allow the engine prelube system to operate, first for 5-10 seconds, or until the cranking motor is engaged. Then activate the engine starting aid.
Ensure there is adequate ventilation before start- up if the truck is in an enclosure. Exhaust fumes are dangerous! 1. Ensure all personnel are clear of the truck before starting the engine. Sound the horn as a warning before starting. 2. Ensure the transmission shift lever is in NEU- TRAL and the parking brake is applied. In cold ambient conditions and when the engine is cold, the engine rpm will not increase above low idle speed until the engine controller deter- mines 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. Acceleration and travel will not be available until the engine completes this warm-up cycle.
DO NOT attempt to start the engine while the cold weather starting heater (if equipped) is operating. Damage to coolant heaters will result due to lack of circulation. 3. The key switch is a four position (ACC, OFF, RUN, START) switch. Cold Weather Starting When the key slot is in the verti- cal position, the electrical system is off and no electrical devices are energized. Use this key position to stop the engine when it is on. Starting fluid is extremely volatile and flammable! Use extreme care when handling and using start- ing fluid. ACC- When the key is rotated counterclockwise from the OFF position, it is in the accessory (ACC) position.
This position is used to power certain accessories such as the radio when there is no intention of starting the engine. If the truck is equipped with cold weather starting aid and the ambient temperature is below -5°C (23°F), push the engine starting aid switch in for three sec- onds. Release the starting aid switch and turn the key switch to START. If the engine does not start, wait at least 15 seconds before repeating the proce- dure. 4. When the switch is rotated one position clock- wise, it is in RUN and all electrical circuits except START are energized. With the selector lever in NEU- TRAL and the parking brake applied, rotate the key switch fully clockwise to the START position.
Hold this position until the engine starts (see the follow- ing note). The START position is spring loaded to return to RUN when the key is released. DO NOT crank the electric cranking motors for more than 30 seconds. Allow two minutes for the motor to cool before attempting to start the engine again. Severe damage to the cranking motors may result from overheating.