Abstract: An air intake system for an agricultural implement having a mobile frame, an internal combustion engine carried by the frame, a heat exchanger defining front and rear planar faces, an engine driven fan and a walled structure enclosing the engine, heat exchanger and fan. The walled structure defines a screened air inlet through which environmental air is drawn upon operation of the fan. An air plenum directs environmental air between the air inlet and the front face of the heat exchanger. The heat exchanger is mounted proximate to the fan toward one end of the air plenum. A bypass channel arranged adjacent the heat exchanger directs environmental air around the heat exchanger and exhausts a downstream of the rear face of the heat exchanger. Foreign material, carried in the environmental air, is likewise directed around the heat exchanger whereby preventing relatively rapid plugging of the heat exchanger.

Abstract: A fuel tank arrangement for a tractor which stores its fuel in an auxiliary tank and a main tank that are spaced apart in the tractor. The tractor's engine receives its supply of fuel from a fuel pump after it has passed through a primary fuel filter. The fuel tank arrangement incorporates a first line fluidly connecting the main tank to the fuel pump. The arrangement also utilizes a main vent to connect the forwardmost portion of the upper section of the main tank to the atmosphere, and an auxiliary vent to connect the rearwardmost portion of the upper section of the auxiliary tank to the atmosphere. The next element of the arrangement is a supply system which requires all of the fuel to pass through the main tank to reach the fuel pump. The supply system fluidly connects the bottom section of the auxiliary tank with the forwardmost portion of the top section of the main tank through a second line.