Method and apparatus for startup of a hydrostatic transmission

Details Method and apparatus for startup of a hydrostatic transmission Method and apparatus for startup of a hydrostatic transmission

F - Mech Eng,Light,Heat,Weapons

15

B

138/39

F15B 15/00 (2006.01) B62D 11/02 (2006.01) F16H 61/40 (2006.01)

Patent

CA 1233726

METHOD AND APPARATUS FOR STARTUP OF A HYDROSTATIC TRANSMISSION ABSTRACT OF THE DISCLOSURE An improved method and apparatus for the cold weather startup of a hydrostatic transmission in a skid-steer loader is disclosed wherein the flow of hydraulic fluid is directed through the hydraulic system for operating the work implement to heat up the hydraulic fluid before being directed into the hydrostatic transmission prior to engaging the drive to the transmission. By disconnecting the drive between the engine and the hydrostatic transmission, the fluid in the hydrostatic transmission can be warmed before engaging the drive to reduce the startup problems due to inherent resistances of cold hydrostatic transmissions. Utilization of the hydraulic control valve for controlling the operation of the work implement to direct the flow of hydraulic fluid over a relief valve built therein permits the hydraulic fluid to be heated quickly.

484478

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