The pivot arm then releases the first angular sector of the tire and {HEAD ~ the press arm} moves away from {TAIL ~ contact} with the second angular sector of the tire to allow the tire to return to its initial shape 
moves away from
The pivot arm then releases the first angular sector of the tire and { HEAD ~ the press arm } moves away from { TAIL ~ contact } with the second angular sector of the tire to allow the tire to return to its initial shape
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD REL REL REL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH