Abstract: A heating element for the reservoir of the hydraulic system of an agricultural tractor is disclosed wherein the heating element is positioned within the interior of the inlet screen member. The heating element is formed with a threaded portion cooperable with the threaded opening of the screen member to permit mounting of the screen member directly on heating element, which in turn is threadably received in the interior wall of the hydraulic system reservoir. The screen member is sealed against the heating element to prevent the leakage of hydraulic fluid into the interior of the screen member. The heating element can be replaced with a stationary stud and sealed against the reservoir wall to allow the mounting of the screen member without utilization of the heating element.

Abstract: In a combine harvester, a supplementary header drive is provided for driving the header components in reverse as needed, for example, for clearing blockages of crop material in a platform auger or in the feederhouse conveyor. The drive is powered by a hydraulic motor and selectively connected to the header drive system by a hydraulically actuated clutch. Clutch and motor are connected in parallel to the hydraulic power source and components are designed and sized so that the hydraulically actuated clutch engages before the hydraulic motor begins to rotate.