Operation - Section 30 OM3070 Page 30-20 Operating Instructions NOTE: The grid blower motor will operate at all speed settings except maximum setting. Maximum efficiency is obtained when the truck is operated at the maximum setting . Operating On Trolley 1. There are a number of preset speed levels available for the truck's operation while operat- ing in the trolley mode. Once on trolley, operat- ing at the maximum speed setting, the operator can slow the speed of the truck by switching to a lower speed setting. The actual speed setting will be shown by the number of speed level indi- cators lit. At the lowest setting (1), one will be lit, at the maximum setting, all will be lit. 2.
If stopping or rapid slowing is required while on trolley, release the throttle and depress the retarder and/or brake pedal as necessary. Either will lower the pantograph and the truck will switch back to diesel mode. 3. If the current leakage circuit detects a short between the overhead trolley system and the truck chassis, the pantographs will lower and the truck electrical controller will switch back to diesel mode. Keep the throttle pedal pressed fully while cycling onto trolley assist. The trolley controller will automati- cally reconnect the motors for trolley operation. A slight hesitation will be noted during this operation.
While on trolley the operator must keep his foot on the accelerator pedal in case the trolley system would drop out and the drive system would go back to diesel power. This will happen automatically so the operator should be prepared if it should occur. TROLLEY SPEED BASED ON LINE VOLTAGE INPUT Master Control Lever Position Overhead Panel Light Trolley Speed With 1400 VDC Input Trolley Speed With 1500 VDC Input Trolley Speed With 1600 VDC Input 1 Low 7.6 - 8.1 mph 8.6 - 9.1 mph 9 - 10.0 mph 2 Medium 8.9 - 9.3 mph 9.9 - 10.2 mph 10 - 11 mph 3 High 11.0 - 11.1 mph 11.9 - 12.1 mph 12- 13 mph 4 Maximum 12.7 mph 13.7 mph 15 mph NOTE:
Operators should be aware that the above speeds may not always be obtained. Many ordinary conditions can cause the speeds to be less. Some conditions are: Line voltage may drop at times due to the number of trucks on the overhead lines. A drop in line voltage will affect truck speed. Voltage is directly related to truck speed (voltage = speed). The Mine’s operations can lower line voltage which would cause the truck to travel at slower speed. This may be done due to haul road conditions such as: . Slippery roads due to snow and ice; . Muddy roads due to rains, ect. . Road construction, ect.