Auxiliary hydrostatic front wheel drive system

Details Auxiliary hydrostatic front wheel drive system Auxiliary hydrostatic front wheel drive system

1976-07-15

1978-01-24

Peters, Jr., Joseph F.

Motor vehicles

Steam traction engines

Spring mounted on axle

180 66R, B60K 2500

Patent

active

040698866

ABSTRACT:
A vehicle such as a motor grader includes a hydrostatic auxiliary front wheel drive system which utilizes implement system pressurized fluid flow to drive a pair of fixed displacement hydraulic motors, such motors being drivingly connected to cause rotation of the front wheels. A pilot operated series-parallel valve in combination with a flow divider allows the motors to be driven in series or in parallel. A directional control valve is selectively responsive to operator control, and clutch actuation is accomplished automatically by directing a controlled portion of system fluid to such clutches to overcome the normal spring bias thereof.

REFERENCES:
patent: 2397299 (1946-03-01), Strid
patent: 3481419 (1969-12-01), Kress et al.
patent: 3579988 (1971-05-01), Firth et al.
patent: 3833100 (1974-09-01), Aschauer
patent: 3851741 (1974-12-01), Sugahara et al.

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