Tractor and implement and hydraulic system therefor

Details Tractor and implement and hydraulic system therefor Tractor and implement and hydraulic system therefor

1978-06-05

1980-03-18

Stouffer, Richard T.

Earth working

With actuator on trailing ground supported frame for moving...

Vertically

172445, 172448, A01B 6322

Patent

active

041934580

ABSTRACT:
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 three-point 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.

REFERENCES:
patent: 3073622 (1963-01-01), Merritt
patent: 3207233 (1965-09-01), Shumaker
patent: 3450220 (1969-06-01), Frandsen et al.
patent: 3627059 (1971-12-01), Jackson et al.
patent: 3630290 (1971-12-01), Williams et al.
Operator's Manual #OM-A33814 Issue C7 for John Deere 7100 Mounted Max-Emerge Planters, May 1977, pp. 108, 109.
Parts Catalog #PC-1468 for John Deere 7100 Mounted Max-Emerge Planters, Oct. 1975, pp. 10, 11 and 17.

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