This gas shock absorber controls the damping rate of the chassis suspension on the host tractor. It is installed between the axle and the frame, where it compresses and extends to absorb road and field irregularities. A loss of gas charge causes the suspension to bottom out or bounce excessively, reducing ride comfort and control. The manufacturer machines the rod and seal surfaces to the same dimensions as the original assembly, so the shock fits the mounting brackets without modification. On replacement, ensure the retaining bolts are torqued to specification and that the shock is oriented with the rod end in the correct position.