Ch 6 page 4 ELECTRICAL SYSTEM Safety instructions Voltage The trucks have a 24V system. The battery ч is used as ground connection. Supply Two 12V/105Ah batteries are connected together in serial connection to provide the system with 24V. The batteries are located on the left hand side of the fender. A 28V/100A alternator is used to charge the batteries. The alternator is located on the front of the engine. 3 2 Battery main switch A main switch is connected on the battery + supply cable. The battery main switch is located in the left hand side fender. 1 4 Fuses The fuses are located on the VCU3 inside the cab, behind the cover on the back wall + “junction” box in front left fender.
WARNING Never turn off battery main switch when engine is running. Never turn off battery main switch when ignition is on. Leave battery main switch in ON position as long the lamp (4) is on or flashing. When the lamp(4) is off the main switch can safely be turned to OFF position. 1.Main switch. 2.Emergency stop of engine. 3.External power supply output. 4.Indicator lamp. Figure 1 Welding on the dump truck The transmission and the engine are equipped with electronic control units. Before welding on the dump truck: 1. Disconnect batteries. 2. Unplug the connector on the electronic control units for the engine and the transmission. The control units are located in the wall behind the seat. 3.
Ground point should be less than 1 m from welding point. 4. There should not be sealings, bearings or wiring harness between the welding point and the ground point. SHOP MANUAL