Operating Instructions - Section 30 7/09 OM3050 Page 30-12 TROLLEY OPERATING INSTRUCTIONS Getting on line When operating a trolley truck, follow the procedure listed below to get on the trolley line. The instructions provided here are specifically for trolley use. General operating instructions outlined earlier in this chapter apply. 1. Move the directional control lever to the T position to prepare for trolley operation. If a haul truck is unable to get on trolley, the operator will continue up the ramp in the diesel mode, and contact the supervisor immediately describing the problem encountered. 2.
Approach the trolley line equipped portion of the haul road at 8 - 16 kph (5 - 10 mph) to allow for smooth transition into trolley assist propulsion. If speed of the truck (in diesel mode) is below 8 kph (5 mph), the trolley system will not start the trolley sequence. Increase speed to 8 - 16 kph (5 - 10 mph). Sufficient distance must be allowed between trucks to prevent overloading of the trolley line electrical supply system and/or conductors and trucks being rejected from the trolley line. Operating in trolley line mode Only trucks that are loaded will travel on the trolley line. Trucks operating on trolley will have a faster speed than when operating on diesel.
Because of the faster speed, all safety and warning recommenda- tions must be followed very closely. 3. Align the truck with the entrance area of the trolley line system when entering the overhead cables for trolley. The operator should center the truck pantographs with the cables as he enters the trolley pick up area. All recommendations for diesel operation apply for trolley operation with the addition of the following rec- ommendations: NOTE: The center of operation is approximately the center of the truck cab with the left overhead power cable. 1. Loaded trucks operating on diesel will not be as fast as loaded trucks that are on trolley. 2.
If there is something in the path of a truck while on trolley, and it is necessary to go around it, the truck will have to drop off the trolley and use diesel power. After driving around the object, the truck can return to trolley. 4. With accelerator pedal still fully depressed, press the pantograph raise switch and hold for 0.5 seconds or longer. The pantograph will then raise to contact the overhead cables. The “Pantograph Up” light on the Status Monitor Panel will illuminate. 5. After the pantograph is in contact with the cables for two seconds, and the voltage is within limits, the trolley sequence will complete and the wheel motor power will switch to the overhead power cables.
The Status Monitor Panel indicator light for “Pantograph Energized” should illuminate. The engine speed will decrease to the low idle setting. Always keep the pantographs stowed in the low- ered position when not in use on trolley. Never drive near or under the trolley lines with raised pantographs unless the truck is properly aligned with the trolley line. If this procedure is not fol- lowed, pantograph and line damage will occur. 3. Trolley-assist is to be used for loaded uphill haul only. Trucks must have the dump body at least half loaded, or more, before going uphill on trolley. Empty trucks are not to go uphill on trolley. NOTE:
If the drive system detects low voltage on the overhead power lines, the pantograph will lower and a fault message will be issued.