OM3030.1 Operation - Section 3 Operating Instructions Page 3-5 4. The keyswitch is a three position (Off, Run, Start) switch. When switch is rotated one position clockwise, it is in the "Run" position and all electrical circuits (except "Start") are activated. With Selector 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. NOTE: If truck is equipped with the Cummins 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. 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 o F (10 o 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. Do not crank an electric starter for more than 30 seconds . Allow two minutes for cooling before attempting to start engine again. Severe damage to starter motor can result from overheating . AFTER ENGINE HAS STARTED 1. Become thoroughly familiar with steering and emergency controls. After engine has started and low pressure and warning systems are normal, test the truck steering in extreme right and left directions. If the steering system is not operating properly, shut engine down immediately. Determine the steering system problem and have repairs made before resuming operation. 2.
Operate each of the truck’s brake circuits at least twice prior to operating and moving the truck. These circuits include individual activation from the operator’s cab of the service brake, parking brake, and brake lock (also emergency brake, if equipped). With the engine running and with the hydraulic circuit fully charged, activate each circuit individually. If any application or release of any brake circuit appears sluggish or improper, or if warning alarms are activated on application or release, shut the engine down and notify maintenance personnel. Do not operate truck until brake circuit in question is fully operational. 3.
Check gauges, warning lights and instruments before moving the truck to insure proper system operation and proper instrument functioning. Give special attention to braking and steering circuit hydraulic warning lights. If warning lights come on, shut down the engine immediately and determine the cause. 4. Insure headlights, worklights and taillights are in proper working order. Good visibility may prevent an accident. Check operation of windshield wiper. 5. When truck body is in dump position, do not allow anyone beneath it unless body-up retaining pin or cable is in place. 6. Do not use the fire extinguisher for any purpose other than putting out a fire!
If extinguisher is discharged, report the occurrence so the used unit can be refilled or replaced. 7. Do not allow unauthorized personnel to ride in the truck. Do not allow anyone to ride on the ladder of the truck. 8. Do not leave truck unattended while engine is running. Shut down engine and apply park brake before getting out of cab.