Fluid pressure control circuit for working vehicle having...

Details Fluid pressure control circuit for working vehicle having... Fluid pressure control circuit for working vehicle having...

F - Mech Eng,Light,Heat,Weapons

16

D

138/72

F16D 31/06 (2006.01) B60T 13/22 (2006.01)

Patent

CA 1323825

Abstract of the Disclosure A fluid pressure control circuit for a working vehicle having a transmission operable by a fluid pressure and a negative type fluid pressure parking brake. The control circuit comprises a fluid pressure cylinder movable to a first end position to place the transmission in a low speed position and to a second end position to place the transmission in a high speed position, a fluid supply line for supplying pressure fluid to the cylinder, and a control valve mounted on the fluid supply line. The control valve comprises a three position valve having a first position to release the pressure fluid from the parking brake and the fluid supply line, a second position to supply the pressure fluid to the parking brake and set the cylinder to the first end position, and a third position to supply the pressure fluid to the parking brake and set the cylinder to the second end position.

554717

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