Once deposited on the feeder, {HEAD ~ a pusher} engages {TAIL ~ one end} of the bale and pushes the bale along the feeder to progressively advance successive flakes of the bale into a discharging position off the remote end of the feeder 
engages
Once deposited on the feeder , { HEAD ~ a pusher } engages { TAIL ~ one end } of the bale and pushes the bale along the feeder to progressively advance successive flakes of the bale into a discharging position off the remote end of the feeder
OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD REL 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 OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH