An undercarriage of a belted or track type machine includes a drive wheel rotatably mounted to {TAIL ~ the machine} and a roller frame assembly pivotally mounted to {HEAD ~ the machine} 
An undercarriage of a belted or track type machine includes a drive wheel rotatably mounted to { TAIL ~ the machine } and a roller frame assembly pivotally mounted to { HEAD ~ the machine }
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD