Operation - Section 3 OM3037 Page 3-24 Operating Instructions PANEL GAUGES, INDICATORS, AND CONTROLS (Figure 3-6) (1, Figure 3-6) KEY SWITCH The key switch is a 3-position (Off, Run, Start) switch. When the switch is rotated one position clockwise, it is in the “Run” position and all electrical circuits (except “Start”) are activated. With the Selector Switch in “Neutral”, 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 engine is equipped with a Prelub system, a noticeable delay will occur before cranking begins.
Refer to Section “A”, Engine Startup Safety Practices for detailed instructions. With truck stopped, turn keyswitch counterclockwise to “Off” for normal engine shutdown. Use the Engine Shutdown switch on center console, if engine does not shutdown with keyswitch. NOTE: A ground level shutdown switch is located near the diagonal ladder steps on right front corner of truck. (2, Figure 3-6) ENGINE SHUTDOWN SWITCH with TIMER DELAY (OPTIONAL) This is a 3-position rocker type switch (Off-On-Momentary). Refer to “Operating Instructions” section, “DELAYED ENGINE SHUTDOWN PROCEDURE”, for a complete detailed operation of this switch. 1.
Press top of switch to the “On” (center position), then press firmly to the “Momentary” (upper position) and hold this position briefly to activate the 5 Minute Idle Timer (switch is spring-loaded to return to “On” position when released). At the SAME time while holding the “Momentary” switch position, turn the Keyswitch counterclockwise to the “Off” position. When the engine stops after the 5 minute idle period, the hydraulic bleed- down timer will be activated and turn off the 24 VDC electric circuits controlled by the keyswitch. Engine WILL NOT SHUT DOWN, if keyswitch is not turned “Off” in this manner. NOTE:
To cancel the 5 Minute Idle Timer sequence, press Timer Delay Shutdown switch to the “Off” (lower) position. If keyswitch is in “Off” position, engine will stop. If keyswitch is in “On” position, engine will continue to run. If engine does not shutdown with keyswitch, use Engine Shutdown Switch on operator cab center console, and hold this switch down until engine stops. The Ground Level Shutdown Switch will also stop the engine during this time-out. 2. When the Engine Shutdown Timer has been activated, the Timer Delay indicator light in the overhead display panel (C4, Figure 3-7) will illuminate to indicate that the shut- down timing sequence has been started.
The engine will continue to run at Idle RPM for approximately 5 minutes to allow for proper engine cool-down before stopping.