Operation - Section 30 09/09 OM3056 Page 30-6 Operating Instructions ENGINE START-UP NOTE: If the truck is equipped with an engine prelube system, a noticeable time delay will occur (while the engine lube oil passages are being filled) before the starter engages. The colder the engine oil temperature, the longer the time delay. In addition, if the truck is equipped with an engine starting aid for cold weather starting, the engine prelube system must be engaged for 5-10 seconds, or until the starter is engaged, before activating the engine starting aid. 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! Starting fluid is extremely volatile and flammable! Use with extreme care. If the truck is equipped with the optional engine start- ing aid and the ambient temperature is below 10°C (50°F), turn the key switch to the START position. While cranking the engine, move the engine starting aid switch to the ON position for three seconds maxi- mum, then release the engine starting aid.
If the engine does not start, wait at least fifteen seconds before repeating the procedure. DO NOT crank an electric starter for more than thirty seconds. Allow two minutes for starter cooling before attempting to start the engine again. Severe damage to the starter motor can result from overheating. 1. Ensure all personnel are clear of the truck before starting the engine. Sound the horn as a warning before actuating any operational con- trols. If the truck is in an enclosure, ensure ade- quate ventilation before start-up. Exhaust fumes are dangerous! 4. The key switch is a three-position switch (OFF, RUN, START). 2. Ensure the parking brake switch is in the ON position.
The selector switch must be in NEU- TRAL before starting the truck. a. Turn the key switch one position clockwise to the RUN (except START) position. All electrical circuits (except start) are activated. 3. If the truck is equipped with auxiliary cold weather heaters, DO NOT start the engine while the heaters are on. Damage to the coolant heaters will result. b. With the selector switch in NEUTRAL, turn the key switch fully clockwise to the START position and hold this position until the engine starts. The START position is spring- loaded and will return the switch to the RUN position when the key is released.