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