Operation - Section 3 OM3043 Page 30-10 Operating Instructions DELAYED ENGINE SHUTDOWN PROCEDURE 1. Stop the truck out of the way of other traffic on a level surface and free of overhead power lines or other obstructions (in case dump body should need to be raised). Engine WILL NOT SHUT DOWN, if keyswitch is not turned to the OFF position. NOTE : To cancel the 5 Minute Idle Timer sequence, press Timer Delay Shutdown switch to the OFF (lower) position. a. Reduce engine speed to low idle. b. Place the directional Selector Switch (2, Fig- ure 3-4) in NEUTRAL. •If keyswitch is in OFF position, engine will stop. c. Apply the Parking Brake switch (13, Figure 3-6).
Be sure the Parking Brake Applied indi- cator light in the overhead display panel (A3, Figure 3-7) is illuminated. •If keyswitch is in ON position, engine will continue to run. If engine does not shutdown with keyswitch, use Engine Shutdown Switch (8, Figure 3-4) 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. Refer to Instrument Panel And Indicator Lights Sec- tion for the location on the instrument panel of Engine Shutdown Switch with 5 Minute Idle Timer Delay (2, Figure 3-6). This is a 3- position rocker-type switch (Off-On-Momentary). 3.
After engine has stopped, perform steps 4 and 5, as described in ENGINE SHUTDOWN PRO- CEDURE above. a. Press top of switch to the ON (center posi- tion), 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). SUDDEN LOSS OF POWER Bring the truck to a safe stop as quickly as possible by using the foot pedal to apply the service brakes. b. When the Engine Shut- down Timer has been activated, the Timer Delay indicator light in the overhead display panel (C4, Figure 3-7) will illuminate to indi- cate that the shutdown 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. Dynamic retarding will not be available! Do not use the service brakes for continuous retarding purposes. If possible, steer the truck to the side of the road while bringing it to a complete stop. Apply the parking brake as soon as the truck has stopped moving. Turn key switch OFF and notify maintenance personnel immediately. If the truck becomes disabled where traffic is heavy, mark the truck with warning flags in daylight or flares at night. c. The Engine Shutdown Timer switch DOES NOT turn off 24 VDC electric power.
Turn Keyswitch counterclockwide to the OFF position to cause the engine to shutdown when timing sequence is complete. When the engine stops after the 5 minute idle period, the hydraulic bleeddown timer will be activated and turn off the 24 VDC electric cir- cuits controlled by the keyswitch. If the engine suddenly stops, there is enough hydrau- lic pressure stored in the brake and steering accumu- lators to allow the operation of the steering and brake functions. However, this oil supply is limited so it is important to stop the truck as quickly and safely as possible after the loss of engine power.
If the brake supply pressure drops to a pre-determined level, the Low Brake Pressure warning light will illuminate and a buzzer will sound. If the brake pressure continues to decrease, the Auto-Apply feature will activate and the service brakes will apply automatically to stop the truck. Apply parking brake as soon as the truck comes to a complete stop.