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A hydraulic circuit has been developed that reduces the number and magnitude of significant oscillations that occur when stopping a swinging backhoe on both axial and side-shift loader backhoes. The circuit can account for a large range of inertias and speeds, which are developed by varying the location of the bucket relative to the chassis, the amount of load in the bucket, the flow rate to the swing cylinders, and the length of time that flow occurs. Circuit activation is automatic and results in improved control. Plots of pressure data demonstrate the circuit's effectiveness. A hydraulic schematic is included.

This paper will discuss the new Case MX Magnum® tractor transmission controls. They are electronically controlled, hydraulic valves that reduce transmission internal torque spikes, operator shift shock, complexity, and eliminated the need for periodic system calibration. The new system splits the controls into their simplest common denominators, and leverages commonality of parts and concepts to reduce both system and development costs. It maintains clutch pressure during low regulated pressure transients that occur during a shift, while compensating for clutch wear, to maintain the desired shift characteristics.