Abstract: A ride control system comprising a member for substantially equalizing pressure and ride valve having three positions, namely, a first inactive position, a second active position and an intermediate equalizing position. The substantial pressure equalizing member equalizing the pressure within the head side of at least one boom cylinder with an accumulator. The inactive position corresponding to one in which the ride valve assembly maintains isolation between the accumulator and at least one boom cylinder. The active position corresponding to one in which the ride valve assembly places the accumulator and at least one boom cylinder in communication with each other. The intermediate position corresponding to one in which the ride valve assembly maintains isolation between the accumulator and at least one boom cylinder and facilitates the activation of the substantial equalizing means.

Abstract: A cooling system for use in association with an engine encased within an engine compartment, having a remotely positioned cooling fan and radiator. The cooling system includes a containment member operably positioned within the engine compartment. The containment member includes an exposure opening which defines a cavity. The cooling system likewise includes a conduit associated with the containment member. The conduit includes a first end placed in fluid communication with the cavity and a second end extending outside of the engine compartment which is placed in fluid communication with the cooling fan. Circulation of the fan directs the passage of fluid from within the cavity and the conduit.

Abstract: A motion control system for controlling the motion of a crawler having a left and right track. The system comprises a pivotally mounted controller; a steering control system hydraulically communicable with a pressurized fluid supply, a brake of each of a left and right track of a crawler and a clutch of each of a left and right track of a crawler, a direction control system hydraulically communicable with a pressurized fluid supply, a forward and a reverse transmission signal input, a steering speed controlling system for controlling the speed of a left track and a right track, and a transmission gear controlling system. The steering speed controlling system includes at least one selector. The transmission gear controlling system includes at least one transmission gear selector. The steering control system is positioned so that pivoting the controller in a first series of planes operates the steering control system.