Operation - Section 3 OM3043 Page 30-4 Operating Instructions ENGINE START-UP SAFETY PRACTICES 1. Insure all personnel are clear of truck before starting engine. Always sound the horn as a warning before actuating any operational con- trols. If the truck is in an enclosure, insure ade- quate ventilation before start-up. Exhaust fumes are dangerous! Always mount and dismount ladders facing the truck. Never attempt to mount or dismount while the truck is in motion. 27. When checking coolant in radiator, use coolant level sight gauge (if equipped) or observe cool- ant level through opening in end of hood.
If it is necessary to remove radiator cap, shut down engine (if running), and relieve coolant pressure SLOWLY before removing radiator cap. 2. Be sure parking brake switch is in ON position. Check and insure Selector Switch is in NEU- TRAL before starting. 3. If truck is equipped with auxiliary cold weather heater system(s), do not attempt to start engine while heaters are in operation. Damage to cool- ant heaters will result. 4. The keyswitch is a three position (Off, Run, Start) switch. When switch is rotated one posi- tion clockwise, it is in the RUN position and all electrical circuits (except START) are activated.
With Selector Switch in NEUTRAL, rotate key- switch fully clockwise to START position and hold this position until engine starts. START position is spring loaded to return to RUN when key is released. If engine has been running, allow coolant to cool, before removing the fill cap or draining radiator. Serious burns may result if coolant is not allowed to cool. 28. Inspect covers over braking grids to be sure latches are in place and secure. Inspect main air inlet to be sure it is clear. Be sure all cabinet door latches are secure. 29. Move on around the cab to the back, open the doors to the brake cabinet, inspect for leaks. Before latching doors, turn work lights off, if used. 30.
Clean cab windows and mirrors; clean out cab floor as necessary. Insure steering wheel, con- trols and pedals are free of any oil, grease or mud. 31. Stow personal gear in cab so that it does not interfere with any operation of the truck. Dirt or trash buildup, specifically in the operator's cab, should be cleared. Do not carry tools or sup- plies in cab of truck or on the deck. 32. Adjust seat and steering wheel so that it is com- fortable for use. NOTE: If truck is equipped with the Engine Prelube System, a noticeable time delay will occur (while engine lube oil passages are being filled) before starter engagement and engine cranking will begin.
The colder the engine oil temperature, the longer the time delay will be. In addition, if truck is also equipped with Engine Starting Aid for cold weather starting, the Engine Prelube System should be engaged FIRST for 5-10 seconds, or until starter is engaged, BEFORE activating the Engine Starting Aid. 33. Read and understand the OPERATOR CON- TROLS AND INSTRUMENT PANEL discus- sion in this section. Be familiar with all control locations and functions BEFORE operating truck.