Patent ID: 7845471
Filing Date: 2010-12-07
Classification: B60B,F16D,F16H,F16N,Y10T

Abstract:
1. A work vehicle comprising: a frame; a first axle assembly coupled to the frame and including a first axle shaft, a second axle shaft and a first axle housing, wherein the first axle shaft is disposed substantially within the first axle housing; a first wheel coupled to the first axle shaft and a second wheel coupled to the second axle shaft of the first axle assembly; a second axle assembly coupled to the frame and including third axle shaft, a fourth axle shaft and a second axle housing, wherein the third and fourth axle shaft are disposed substantially within the second axle housing; a third wheel coupled to the third axle shaft and a fourth wheel coupled to the fourth axle shaft of the second axle assembly; an axle lubricating fluid disposed within the first and second axle housing; a first cooling fluid circuit fluidly coupled to the first axle assembly to circulate axle lubricating fluid therethrough, the first cooling circuit including a first fluid pump; a second cooling fluid circuit fluidly coupled to the second axle assembly to circulate axle lubricating fluid therethrough, the second cooling circuit including a second fluid pump; wherein the first and second cooling fluid circuits are independent of each other; and a hydraulic motor fluidly coupled to a third fluid circuit, the motor simultaneously controlling both the first and the second fluid pumps, wherein the motor discontinues operation in response to fluid pressure of at least one of the first and second circuit exceeding a predetermined value, the predetermined value corresponding to a motor resistance resulting from a predetermined increase in viscosity of fluid, traveling through at least one, or both of the fluid pumps in the first and second cooling circuits.