F - Mech Eng,Light,Heat,Weapons – 15 – B
Patent
F - Mech Eng,Light,Heat,Weapons
15
B
F15B 1/00 (2006.01) B60K 23/04 (2006.01) E02F 9/22 (2006.01) F15B 1/26 (2006.01) F16H 61/00 (2006.01)
Patent
CA 2047305
ABSTRACT OF THE DISCLOSURE The invention is directed to a work vehicle having a first hydraulic circuit for controlling various working hydraulic actuators. The first circuit is provided with a hydraulic fluid reservoir having a hydraulic circuit inlet structure that is coaxially aligned with the hydraulic circuit outlet structure so that exhaust hydraulic fluid charges the inlet structure. An annular opening is formed between the inlet and outlet structures for receiving additional hydraulic fluid. The main hydraulic pump is provided with a case drain which directs fluid back to the reservoir through either an oil cooler line or a case drain line having a pressure relief valve. A second hydraulic circuit directs pressurized hydraulic fluid to a hydraulically shiftable transmission. A branch supply line takes pressurized hydraulic fluid from the transmission pump and directs it to a differential lock pump. Exhausted fluid from the differential lock pump is returned directly to the transmission pump supply line.
Gage Douglas M.
Vize Richard J.
Borden Ladner Gervais Llp
Deere & Company
Gage Douglas M.
Vize Richard J.
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