Operation - Section 3 OM3020.1 12/99 Page 3-10 Operating Instructions TOWING - Continued 5. Protect both operators in the event of tow bar failure. 6. Block disabled truck to prevent movement while attaching tow bar. 7. Release disabled truck brakes and remove blocking. 8. Sudden movement may cause tow bar failure. Smooth and gradual truck movement is preferred. 9. Minimize tow angle at all times - NEVER EXCEED 30 o . The towed truck must be steered in the direction of the tow bar. SAFE PARKING PROCEDURES The operator must continue the use of safety precautions when preparing for parking and engine shutdown.
In the event that the equipment is being worked in consecutive shifts, any questionable truck performance the operator may have noticed must be checked by maintenance personnel before the truck is released to another operator. 1. The truck should be parked on level ground, if at all possible. If parking must be done on a grade, the truck should be positioned at right angles to the grade. 2. The parking brake must be applied and/or chocks placed fore/aft of wheels so that the truck cannot roll. Each truck should be parked at a reasonable distance from another. 3. Haul roads are not safe parking areas. In an emergency, pick the safest spot most visible to other machines in the area.
If the truck becomes disabled where traffic is heavy, mark the truck with warning flags in daylight or flares at night. NORMAL ENGINE SHUTDOWN PROCEDURE The following procedure should be followed at each engine shutdown. 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). a. Reduce engine speed to idle. Allow engine to cool gradually by running at low idle for 3 to 5 minutes. b. Place the directional Selector Switch (2, Figure 3-4) in “ N eutral”. c. Apply the Parking Brake switch (13, Figure 3-6).
Be sure the “Parking BrakeApplied” indicator light in the overhead display panel (A3, Figure 3-7) is illuminated. 2. Place REST switch (26, Figure 3-6) in “On” position to put AC Drive System in “REST” mode of operation. Be sure the “REST” indicator light in the overhead panel (B6, Figure 3-7) is illuminated. NOTE: The truck is equipped with a Timer Delay to allow the engine to run at idle for 5 minutes before Engine Shutdown, if this option is desired, refer to DELAYED ENGINE SHUTDOWN PROCEDURE (next page) . 3. With engine cooled down, turn keyswitch (1, Figure 3-6) counterclockwise to “Off” position for normal shutdown of engine.
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. 4. With keyswitch “Off”, and engine stopped, wait at least 90 seconds. Insure steering circuit is completely bled down by turning steering wheel back and forth several times. No front wheel movement will occur when hydraulic pressure is relieved. If the vehicle continues to steer after shutdown, notify maintenance personnel. 5.
Verify that all the LINK VOLTAGE lights are OFF (one on back wall of operator cab, and two on deck control cabinets), and notify maintenance personnel, if any light remains illuminated longer than five minutes after engine shutdown. 6. Close and lock all windows, remove key from keyswitch and lock cab to prevent possible unauthorized truck operation. Dismount truck properly. Put wheel chocks in place.