The swing arm assembly is pivotally mounted to a pivot about {HEAD ~ a swing arm pivot axis} located above the bottom rail surface when the suspension assembly is mounted to {TAIL ~ the trailer} 
The swing arm assembly is pivotally mounted to a pivot about { HEAD ~ a swing arm pivot axis } located above the bottom rail surface when the suspension assembly is mounted to { TAIL ~ the trailer }
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL