2015 Brandt R4 Power Unit with OTM Tracker and Trailer with Tie Grapple and Brandt Tie Counter. The R4 Power unit has 73,302 miles and 6066 hours. The power unit is 2015 model Freightliner Coronado’s 550 hp upgraded to 600 hp and Twin Disc transmission and toque converter installed at Brandt. The OTM Tracker is a Deere Model 120D with 8,733 hours. OTM Tracker can be moved from the trailer to the bed of the truck and then it can be lifted up to transition over to the railcars.