1969-02-01

An Improved Lubricant for Hydrostatic Transmissions 690587

Automatic transmission fluids, motor oils, and multipurpose tractor oils are now widely used in hydrostatic transmissions. These fluids provide adequate service in most of today's relatively low pressure equipment, but future requirements will be more severe and better lubricants will be needed for tomorrow's larger, higher pressure equipment. An improved hydrostatic fluid has been developed which should help optimize performance of present and future hydrostatic transmissions. Results of a 100-hr, 5000 psi hydrostatic pump test were excellent. Analysis of the used oil and examination of the equipment indicated the fluid would have continued to perform satisfactorily much longer.

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