Cummins
- 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. After the engine starts, release the key.
- Bring the engine up to operating speed gradually as it warms up and develops stable oil pressure.
- If minimum engine oil pressure at idle of 10 psi (69 kPa) does not register within 15 seconds, shut down the engine.
- Idle the engine for three to five minutes at 1000 rpm before operating the engine under load.
Note: Before doing these steps, do the steps in "Prestart".
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.
Note: When the engine is started, it takes a short time to build up a lubricating oil film between the shafts and bearings, and between the pistons and liners. The oil pressure gauge indicates any drop in lubricating oil pressure within 15 seconds of engine start-up.
Caution: Protect the turbocharger during the start-up by not opening the throttle or accelerating the engine above 1000 rpm until minimum engine idle oil pressure registers on the gauge. Failure to do so could damage the turbocharger.