Original Sauer Dan-foss AT302661 83006780 AT457670 83005896 Hydraulic Piston Pump

Performing minor repairs may require removal of the unit from the vehicle/machine. Thoroughly clean the unit before beginning maintenance, or repair activities. Since dirt and contamination are the greatest enemies of any type of hydraulic equipment, follow cleanliness requirements strictly. This is especially important when changing the system filter and when removing hoses or plumbing

product-800-139

Hydraulic proportional controls infinitely vary the motor displacement between maximum and minimum by feeding a variable hydraulic signal pressure to the end of the 4-way valve directly, or to a piston that moves the 4-way valve As signal-pressure shifts the 4-way valve, it ports pressure to the ends of the servo piston, changing motor displacement. A threshold spring and a ramp spring act on the opposite end of the 4-way valve.