Patent ID: 6981386

Claim:
Silencing equipment for an air-cooling assembly in a large off-road vehicle having wheels, traction motors for the wheels that operate in a motoring mode to propel the vehicle and generate electrical power in a dynamic braking mode, resistor grids for dissipating the dynamic braking electrical power, and a blower for moving cooling air past the grids to cool them, said silencing equipment comprising: a resistor grid housing; at least one upper inlet for passing cooling air to the interior of said housing, said inlet including noise-absorbing material; a conduit for directing cooling air from said upper inlet through a transition chamber to reach said blower and at least one resistor grid in said housing, wherein said conduit is lined with noise-absorbing material; and a removable cover for said conduit for accessing the air blower for said housing through said transition chamber, whereby servicing of said blower can be performed without removal of the entire upper inlet.