Patent ID: 8051916
Filing Date: 2011-11-08
Classification: B60K,B62D,E02F,F16H

Abstract:
1. A rear wheel drive assist for a wheel tractor scraper, the wheel tractor scraper having a front wheel and a rear wheel, the rear wheel drive assist system comprising: a work tool pump fluidly connected to a fluid operated work tool motor, the work tool motor being operatively connected to a work tool; a fluid operated drive motor operatively connected to the rear wheel; a diverter valve selectively movable between a first position and a second position, wherein when the diverter valve is in the first position, fluid flow is delivered from the work tool pump to the work tool motor and fluid flow is prevented from the work tool pump to the at least one fluid operated drive motor, and wherein when the diverter valve is in the second position, fluid flow is delivered from the work tool pump to the at least one drive motor; and a controller configured to control operation of the diverter valve, including