Abstract: A wheel tractor scraper having a rear wheel drive assist, the wheel tractor scraper includes a tractor portion pivotally coupled to a rear scraper portion, the rear scraper portion having a bowl for hauling material and a fluid powered work tool configured to assist in loading the bowl, the work tool powered by a fluid pump connected to a fluid operated work tool motor. The rear wheel drive assist includes a fluid operated drive motor coupled to the rear wheels of the machine, a diverter valve having a first position at which fluid flow is delivered from the pump to the work tool motor and a second position at which fluid flow is delivered from the pump to the drive motor, and a controller being configured to control the diverter valve to engage the rear wheel drive assist. The machine may be operated by engaging the pump and work tool motor, and then actuating the diverter valve to the second position to divert flow from the work tool motor to the drive motor.

Abstract: A low ground pressure track chain with track links with offset pin and bushing bores is disclosed. The track chain is provided with a plurality of low ground pressure track shoes and includes a like plurality of link sets coupled by a like plurality of joints. Each link set has one of the track shoes secured thereto and includes a pair of laterally spaced links. Each link has a laterally offset inboard end collar having a first bore, an opposite laterally offset outboard end collar having a second bore, and a rail surface. The rail surface has a predetermined overall width between an inner edge and an outer edge. An inner surface of the inboard end collar is offset inwardly from the inner rail edge and an outer surface thereof is substantially offset outwardly to a position where it is closer to the outer rail edge than to the inner rail edge to provide the first bore with a predetermined press length that is greater than one-half the width of the rail surface.