Rexnord Gmbh

Rexworks Inc.

William J Mohrbacker

Earl C Thayer

A hydraulic system for an auxiliary load transfer device pivotally connected to the rear of a truck includes a sequence valve for preventing the build-up of excess fluid pressure in the main hydraulic line between a pump and a hydraulic cylinder that operates the load transfer device. The sequence valve is operable in response to the difference in pressure between the main hydraulic line and control pressure that controls the output pressure of the pump. The sequence valve opens to direct fluid from the main hydraulic line to tank to prevent the rear wheels of the truck from weaving or wandering during travel.

Hydraulic system for an auxiliary load transfer device

The load supported and transferred by the rear auxiliary axle of a truck is commonly determined by the fluid pressure supportively disposed between the auxiliary axle and the rear end of the truck frame. Where the auxiliary axle is some distance to the rear of the truck for that purpose, the wheels are castered to avoid scuffing. The castering, however, must generally be damped to avoid fluttering of the wheels and shimmying of the axle. Frictional damping means which is here disclosed is both adjustable and varied automatically with the amount of such pressure and the amount of load transferred. In particular the stability of the vehicle is greatly improved.

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Milwaukee, WI, United States of America

William J Mohrbacker