Glossary of Terminology

The bending point where the two frames come together allows for the back wheels and front wheels to turn simultaneously. This makes steering easier and allows for sharper turns in and out of rows.

"Hydrostatic drives can be defined as devices for the transmission of energy by means of a pressurised fluid, thus differing from hydrokinetic drives which utilise the kinetic energy of the fluid. In hydrostatic drives, there is a transfer of fluid from the pump, which converts mechanical energy to hydraulic energy, to the motor, which converts the hydraulic energy to mechanical output. The kinetic energy changes in the fluid involved in this process are very low compared with the pressure energy changes and can usually be disregarded. The hydrodynamic effects of the fluid flow result in loss of pressure, so that hydrostatic drive circuits should be designed to give low-pressure loss, consistent with the overall economic operation of the system."

Source: Hamilton J.D. (1971) Hydrostatic Drives. In: Bell P.C. (eds) Mechanical Power Transmission. Mechanical Engineering Series. Palgrave Macmillan, London. https://doi.org/10.1007/978-1-349-01197-1_7

The oscillation of the frame allows the tractor to travel over rugged terrain and maintain better balance on slopes. This also helps take tension off of the frame whereas a rigid solid frame would take the brunt of the motion.

"Tier 4 compliant engines significantly reduce emissions of particulate matter (PM) and oxides of nitrogen (NOx) to near-zero levels. Relative to previous emissions standards, Tier 4 compliant engines reduce emissions by over 95 percent for most agricultural and construction equipment and just over 86 percent for much larger applications like locomotives and marine vessels."

Source: https://www.dieselforum.org/policy/tier-4-standards