OM3070 Operation - Section 30 Operating Instructions Page 30-13 DELAYED ENGINE SHUTDOWN PROCEDURE 9. Close and lock all windows, remove the key from the key switch, and lock the cab to prevent possible unauthorized truck operation. Dis- mount the truck properly. Refer to Section 32, Operator Cab and Controls, for identification of the various switches and indicator lights. SUDDEN LOSS OF POWER 1. Stop the truck. The truck must be away from other traffic, on a level surface, and away from overhead power lines or other obstructions.
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. 2. Reduce the engine speed to low idle. 3. Place the selector switch in NEUTRAL. 4. Apply the parking brake switch. Ensure the parking brake applied indicator light in the over- head display panel is illuminated. If the brake supply pressure drops to a pre-deter- mined level, the low brake pressure warning light will illuminate and a buzzer will sound.
If the brake pres- sure continues to decrease, the auto-apply feature will activate and the service brakes will apply auto- matically to stop the truck. 5. Move the top of the engine shutdown switch to the ON (center) position. Then, firmly press the switch to the MOMENTARY (upper) position. Hold this position briefly to activate the idle timer. The switch is spring-loaded and will return to the ON position when released. 1. Bring the truck to a safe stop as quickly as pos- sible by using the foot pedal to apply the ser- vice brakes. If possible, safely steer the truck to the side of the road while braking. 6.
When the engine shutdown timer has been activated, the timer delay indicator light in the overhead display panel will illuminate to indi- cate that the shutdown tim- ing sequence has been started. The engine will continue to idle for approximately three minutes to allow the engine to properly cool before turning off . Dynamic retarding will not be available! DO NOT use the service brakes for continuous retarding purposes. NOTE: The engine shutdown timer switch does not turn off the 24VDC electric power. 2. As soon as the truck has stopped moving, shift to NEUTRAL and apply the parking brake. 7.
Turn the key switch to the OFF position to allow the engine to turn off when the timing sequence is complete. When the engine stops after the idle period, the hydraulic bleed-down timer will be activated and the 24VDC electric circuits will turn off. 3. Slowly release the service brakes to check the capacity of the parking brake. If the parking brake can not hold the truck stationary, apply the service brakes and hold them ON. DO NOT turn the key switch OFF, and DO NOT release the service brakes. 4. Notify maintenance personnel immediately. 5.
If the truck is on level ground, or if the parking brake can hold the truck stationary and the truck is in a stable condition, it is then OK to turn the key switch OFF. The engine will only shut off if the key switch is in the OFF position. NOTE: To cancel the idle timer sequence, move the timer delay shutdown switch to the OFF (lower) position. If the key switch is in the OFF position, the engine will stop. If the key switch is in the ON position, the engine will continue to run. 6. If safe to do so, have maintenance personnel place wheel chocks or other mechanisms in front or behind the wheels to reduce the risk of the truck rolling. 7.
If traffic is heavy near the disabled machine, mark the truck with warning flags during day- light hours or use flares at night. Adhere to local regulations. 8. With the key switch OFF and the engine stopped, wait at least 90 seconds. Relieve the steering circuit pressure by turning the steering wheel back and forth several times. No front wheel movement will occur when hydraulic pressure is relieved.