Vehicle oscillating axle locking device

The mobile excavator has a chassis (4) on which a pivoted axle (5) is mounted for controlled movement. The chassis has hydraulic cylinder (7) each with a movable piston rod (9) to engage a pad (12) on the axle. In an unpivoted position of the axle, the piston rods and a normal (15) to the pad upper surface are at an angle.