Abstract: A wheeled forestry tractors design, such as that for a wheel feller-buncher or a site prep tractor, is disclosed. The disclosed design includes a front axle connected to a rear axle by an articulated chassis. A cab is supported between and above the front and rear axles by the chassis. An engine and a hydraulic system are mounted opposite the rear axle from the cab and in a side-by-side relationship with the engine being aligned transversely with respect to the chassis and parallel to the rear axle. The engine is mounted transversely or parallel with respect to the rear axle and slightly behind the rear axle to improve the weight distribution between the front and rear axles or between the front and rear frames.

Abstract: A power management system for a forestry machine includes a controller, a cutting tool, a cutting tool positioning system, a propulsion system, and a steering system. The power management system also includes an engine control module for calculating engine load. Based upon the calculated engine load, the controller automatically adjusts at least one of cutting tool speed, cutting tool positioning system power, and steering system power and adjusts the cutting tool speed toward a speed range defined by a first predetermined percentage above a standard set speed and a second predetermined percentage below the standard set speed.

Abstract: A wheeled forestry tractors design, such as that for a wheel feller-buncher or a site prep tractor, is disclosed. The disclosed design includes a front axle connected to a rear axle by an articulated chassis. A cab is supported between and above the front and rear axles by the chassis. An engine and a hydraulic system are mounted opposite the rear axle from the cab and in a side-by-side relationship with the engine being aligned transversely with respect to the chassis and parallel to the rear axle. The engine is mounted transversely or parallel with respect to the rear axle and slightly behind the rear axle to improve the weight distribution between the front and rear axles or between the front and rear frames.

Abstract: The disclosure relates to a power management system for a forestry machine. The power management system improves the efficiency of the machine by automating control of the hydraulic systems of the machine. A controller receives a signal from a cutting tool speed sensor and can control the operation of the various pumps and motors on the machine.