An optional self-contained hydraulic system in Unverferthâs gravity-box conveyor relies on an 8-hp gas engine to power a hydraulic pump that delivers up to 6 ½ gpm of flow at pressure to 2900 psi.Many conveyors use a power takeoff on the tractor as a power source. However, this ties up the tractor when it could be doing something other than driving the gravity box conveyor, so some farmers prefer a self-contained gravity box conveyor. Unverferth offers just that — an optional self-contained hydraulic system for its gravity box conveyor. Unverferth’s conveyor uses an 8-in.-wide cleated belt running inside a 6-in. steel tube to gently transport up to 10 bushels of seed per minute. A universal mounting bracket allows Unverferth’s conveyor to be installed on all gravity boxes with door widths from 29½ to 60 in. Furthermore, it is designed to tuck securely to the side of the gravity box when not in use to minimize space needed for storage.
Adjustable-speed hydraulics
The machine’s self-contained hydraulic system is relatively simple, consisting primarily of a hydraulic power unit (HPU), hydraulic motor, and control valve. As can be seen in the photo, the HPU fits neatly within the framework of the gravity box, so the vehicle takes up no additional space. The HPU is powered by an 8-hp gasoline engine with electric start driving a hydraulic pump that puts out up to 6½ gpm of fluid at pressure to 2,900 psi.
The HPU also has a 4½-gallon reservoir with return-line filtration.