{HEAD ~ The pivot arm} is then advanced toward the mounting table so that {TAIL ~ the sector} of the tire beads contacts the radial perimeter surface that is defined between the flanges of the wheel  
{ HEAD ~ The pivot arm } is then advanced toward the mounting table so that { TAIL ~ the sector } of the tire beads contacts the radial perimeter surface that is defined between the flanges of the wheel
HEAD HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH