Summary Information (click on this NSN number for detailed information: 2530-00-004-2301)
Arm Assembly, also referenced with federal logistics item name code 61478:
An item of rigid construction, which is a component of the track suspension of track laying vehicles. it is specifically designed to pivot at one end and to accommodate a road wheel or a compensating idler wheel on the other, it may have provision for mounting a torsion bar, suspension or other suspension elements at the pivoting axis. it may include spindle(s), bearing(s), hub(s), and the like, and may have provisions for mounting a shock absorber and/or a track tension adjusting link.