Archive for September 22nd, 2009
Combination Fluids
Combination fluids
are common in the agriculture and construction marketplace. In these applications, a single fluid is shared between such components as the hydraulic system and the manual transmission. As the two components possess differing lubrication needs, the fluid must be formulated to meet both sets of requirements.
Such fluids typically display viscosity performance equal to an SAE 10w-30 multi-grade product, or SAE 5w-30 products which are commonly referred to as ” all weather” fluids. However, they are also often marketed as only an SAE 30. Such fluids exhibit low coefficients of friction and generally the most slippery of all fluids used in transmissions. It is important to note that the fluid is also common to the braking system used in many such applications. Because the braking system ( referred to as a wet brake ) will be in direct contact with the fluid in this situation,it must not cause abnormal slippage of the braking components. This would result in a loss of braking efficiency and a situation known as chattering.