WORM 6D3872 - Caterpillar

Removal Procedure
The Power Train Electric Drive System will contain hazardous voltage levels during machine operation and for a short period of time after engine shutdown.Do not remove any covers that will expose energized high voltage electrical components while the engine is operating.Any type of maintenance on the following components can only be performed after the Power Train Electrical System Service Shutdown procedure has been followed:
High voltage compartments in the inverter cabinet
The rear axle housing that contains the electric drive traction motors
The generator
The retarding resistor grid, the grid blower motor and the grid system cabling
The excitation field regulator
The high voltage cables and connection enclosuresFailure to follow these instructions could result in personal injury or death.
The two top compartments on the front of the Inverter Cabinet contain low voltage control components. All of the other compartments in the cabinet contain high voltage components. The "Electrical Shutdown and Voltage Discharge" procedure must be performed before any of the high voltage compartments are entered.
Refer to Operation and Maintenance Manual, "Electrical Shutdown and Voltage Discharge".
Refer to Operation and Maintenance Manual, "Prepare the Machine for Maintenance".
Illustration 1 g03479504
Remove panel (1).
Illustration 2 g03479767
Disconnect harness assembly (2).
Illustration 3 g03479516
Disconnect cable assembly (3).
Illustration 4 g03479779
Disconnect cable assemblies (4) and wire assemblies (5).
Illustration 5 g03479823
Illustration 6 g03479843
Remove bolts (6). Remove bolts (7) from each side of the thyristor tray assembly.
Remove thyristor tray assembly (8) Installation Procedure
Install thyristor tray assembly (8) in the reverse order of removal.