1. A suspension system for supporting a chassis relative to a crawler frame, the suspension system comprising:a link including a first portion and a second portion, the second portion configured to be coupled to the chassis, the link rotatable about an axis extending transversely through the first portion, the first portion including an inner surface, a plurality of projections extending radially inward from the inner surface, and a plurality of peripheral openings defined by spaces between the plurality of projections;
an axle member configured to be secured to the crawler frame, the axle member including a plurality of peripheral projections, each of the peripheral projections positioned in an associated one of the peripheral openings of the first portion, each of the peripheral projections extending radially outwardly with respect to the axis, rotation of the axle member relative to the link about the axis configured to cause each peripheral projection to rotate about the axis within the associated peripheral opening;
a shaft extending along the axis at least partially between the first portion and the axle member;
a bearing supporting the shaft for rotation about the axis relative to at least one of the link and the axle member;
a seal extending along a perimeter of at least the first portion of the link to seal the plurality of peripheral openings;
a plurality of resilient members, each of the resilient members positioned within an associated one of the peripheral openings and engaging an associated peripheral projection, each resilient member damping movement of the associated peripheral projection relative to the link about the axis in at least a first direction; and
at least one auxiliary roller assembly configured to be coupled to the crawler frame, the auxiliary roller assembly including a yoke and a plurality of auxiliary rollers coupled to the yoke, the yoke configured to be rotatable relative to the crawler frame about a yoke axis, the plurality of auxiliary rollers aligned along a direction of travel of the track and configured to engage an inner surface of the track.