The new G9290 is the first motor grader from SDLG in the heavy-duty size class, its strength and capacity making it ideal for mining haul road maintenance, infrastructure projects, road construction, highways and airports.
The robust design of the new G9290 motor grader builds on the proven reputation of its smaller brothers – the G9138, G9190 (VHP) and G9220 (VHP) – when it comes to the moldboard, circle turn, drawbar, front axle and rear tandems.
However, the G9290 adds a new level of quality with its Volvo-supplied engine and Volvo-designed transmission. A member of the Volvo Group since 2007, SDLG draws on the strength of the group to incorporate high-performance designs and technologies into its products where appropriate.
The SD130B Stage II common rail diesel engine, supplied by Volvo, offers high torque at low revs from a 211 kW output with Variable Horse Power (VHP) technology as standard. Meanwhile, the HTE840S transmission, designed specifically for motor graders by Volvo, has eight speed forward gears and four speed reverse gears all with automatic shifting.
The engine is cooled by a thermostatically-controlled, hydraulically-driven fan, which can be reversed simply by flipping a switch in the cab for easy radiator fin cleaning.
The moldboard is kept level at all times by the 16° oscillation on the heavy-duty front axle, 18° wheel leaning and +/- 15° oscillation on the rear tandem, ensuring quality, fine grading.
The heavy-duty chain-driven tandem with a no-spin differential lock on the rear axle and heavy-duty bearings, meanwhile, delivers outstanding traction and reliability.
The circle turn, exclusive to SDLG, uses twin-gear hydraulic cylinders to provide instant, high-output torque, enabling moldboard rotation under heavy loads. This means there is no need to stop, reverse and change moldboard angle. Having circle turn gears on the outside of the ring gives the benefit of less mud and debris stuck to the gears and hence less wear, less maintenance and longer durability.
The unique SDLG circle drive system comes with five support shoes on the G9290 and non-greasing slide bushings for better grading, an extended service life and easier maintenance. SDLG graders also feature an asymmetric drawbar ball stud that can be rotated 180° in order to keep the drawbar in horizontal level position – vital when performing fine grading.