UP has received around 90 SD70ACe-T4s from EMD. These units are Tier-4 emissions compliant, but there might be a problem. It would seem that UP is starting to put many of the new units in to long term storage. The exact reason is not known. Is it possible that EMD has not yet worked out the bugs in its Tier-4 hardware for the units to be reliable enough for use?
Email Questions or Comments to the Webmaster.
