The D Series cast iron gear motor from Sauer-Danfoss improves performance in demanding off-highway applications. The Series provides a 276 bar (4000 psi) solution in a ductile, three-piece housing with an electrohydraulic proportional relief valve and is suitable for heavy-duty fan drives and mobile work functions on mining conveyors, road pavers, and crushers as well as side-angle mowers. Motors feature extended life and a compact design for installation flexibility and can perform under varying high-load conditions. A proportional relief valve maximizes available machine power by providing cooling only as needed. High-temperature seals and a dirt- and dust-resistant shaft seal improve performance under extreme temperature and pressure conditions. Fan speeds can be controlled to maintain engine and hydraulic system temperatures, and fan reversing capability facilitates a radiator cleaning cycle.