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