Operation - Section 3 OM3037 Page 3-4 Operating Instructions 27. Observe coolant level through opening in end of hood. When checking coolant in radiator, relieve pressure slowly before removing radiator cap. 1. Insure all personnel are clear of truck before start- ing engine. Always sound the horn as a warning before actuating any operational controls. 2. Check and insure Selector Switch is in “ N eutral” position and the park brake switch is in the “ON” position 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 COOLANT HEATERS WILL RESULT!
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. Be sure battery disconnect switches are on. Inspect covers over retarding grids to be sure latches are in place and secure. Be sure battery box hold down wing nuts are in place and secure. Inspect main air inlet to be sure it is clear. Be sure all cabinet door latches are secure. 4. The keyswitch is a three position (Off, Run, Start) switch. When switch is rotated one position clock- wise, it is in the “Run” position and all electrical circuits (except “Start”) are activated.
With Selec- tor Switch in “ N eutral”, rotate keyswitch 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 the truck is equipped with a Komatsu engine, a time delay will occur before starter engagement and engine cranking begins. The Komatsu engine is equipped with a Prelub™ System that circu- lates engine oil throughout the engine prior to startup. The colder the engine oil, the longer the delay before cranking begins.
In addition, if the engine is equipped with the Engine Starting Aid for cold weather starting, the Engine Prelub™ System should be engaged FIRST for 5 to 10 seconds, or until the starters are engaged, BEFORE activating the Engine Starting Aid. 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, controls and pedals are free of any oil, grease or mud. 31. Stow personal gear in cab so that it does not inter- fere with any operation of the truck.
Dirt or trash build-up, specifically in the operator's cab, should be cleared. Do not carry tools or supplies in cab of truck or on the deck. 32. Adjust seat and steering wheel so that it is com- fortable for use. 33. If the truck is in an enclosure, insure adequate ventilation before start-up. Exhaust fumes are dangerous! Starting fluid is extremely volatile and flammable! Use with extreme care. If truck is equipped with optional Engine Starting Aid and ambient temperature is below 50°F (10°C), turn the keyswitch to the “Start” position, and while cranking engine, move the Engine Starting Aid switch to the “On” position for three (3) seconds MAXIMUM ; then release Engine Starting Aid.
If engine does not start, wait at least fifteen (15) seconds before repeating the procedure. ENGINE START-UP SAFETY PRACTICES NEVER ATTEMPT TO START THE ENGINE BY SHORTING ACROSS THE STARTER TERMINALS. This may cause fire, or serious injury or death to anyone in machine’s path. Do not crank an electric starter for more than 30 seconds. Allow two minutes for cooling before attempt- ing to start engine again. Severe damage to starter motor can result from overheating. START THE ENGINE FROM THE OPERATOR’S SEAT ONLY.