TRACTOR-IMPLEMENT HYDRAULIC SYSTEM

摘要

TRACTOR AND IMPLEMENT AND HYDRAULIC SYSTEM THEREFOR A hydraulic system is provided for an integrally-mounted agricultural implement which permits control of the tractor three-point hitch rockshaft cylinder, upper draft link hydraulic cylinder and lift assist hydraulic cylinder through a single valve control lever. One end of the double-acting lift assist cylinder is plumbed in parallel with the single-acting rockshaft cylinder and the other end of the lift assist cylinder is plumbed in parallel with the single-acting upper link cylinder. The fluid lines are coupled with a single control valve to permit the implement to be supported by the lift assist wheel and threepoint hitch during transport, permit it to rock about the lower connection with the three-point hitch during transport and float vertically at the hitch connection during field operations while operating with the lift assist wheel elevated.