Manual Raeder

The POSI-TRACK transmits the power from the engine to the tracks using a hydrostatic transmission. The hydrostatic transmission sends oil under pressure to two individual hydraulic motors, one for each track. The hydrostatic transmission consists of two individual hydrostatic pumps. One pump for each motor. Track speed is increased by sending more oil to the hydraulic motors, and power is increased by sending less oil to the hydraulic motors. With a mechanical transmission the operator must shift down to increase power. With hydrostatic drive the operator can simply pull back on the drive controls, reducing speed and increasing power at the same time.There are three main forces involved in transmitting power from the engine to the ground: ENGINE POWER, HYDRAULIC RELIEFPRESSURE, & TRACTION. Engine power and traction can be easily understood, however relief pressure must be explained in greater detail. All hydrostatic pumps have a “relief valve”. A relief valve makes the oil by-pass the hydraulic motor to prevent the pump from producing too much pressure. Every pump has it’s pressure limitations. The lower the pressure, the longer the pump, as well as other drive components, will last.

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