Caterpillar
- Turn the ignition switch to the on position (see Fig.). All the electronic gauges on the ICU (instrumentation control
unit) complete a full sweep of their dials, the warning and indicator
lights light up, and the buzzer sounds for three seconds.
Fig. 1, Ignition Switch Positions
- Turn the ignition switch to the start position. Do not
press down on the throttle pedal. Release the switch the moment the
engine starts.
- If the engine does not start after 30 seconds of cranking,
turn the ignition switch off.
Note: Some starters are equipped with optional overcrank protection. If overcranking occurs, a thermostat breaks the electrical circuit to the starter motor until the motor has cooled.
- Wait two minutes to allow the starter motor to cool. Turn the ignition switch back to the on position and try again to start the engine.
- As soon as the engine starts, release the ignition switch, allowing the engine to run at a slow idle.
- If the engine does not start after 30 seconds of cranking,
turn the ignition switch off.
- Caterpillar C–10/C–12/C–15/C–16 engines may be operated at low load and speed once the engine oil pressure has reached 10 to 20 psi (69 to 138 kPa). Caterpillar 3406E engines may be operated at low load and speed once the engine oil pressure has reached 18 psi (124 kPa).
- When the engine has reached the normal operating temperature of 189°F (87°C), the engine may be operated at full load.
Note: Before doing these steps, do the steps in "Prestart".
Note: The engine electronics supply the correct amount of fuel for starting the engine. Pedal pressure is unnecessary.
Caution: If the oil pressure is less than 5 psi (35 kPa), shut down the engine immediately to prevent serious damage. If the vehicle is equipped with an automatic shutdown system, the engine will shut down after 30 seconds.