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MARC replacing electric locomotive commuter fleet with Tier-4 diesels

Tier 4 compliant diesel-electric commuter locomotives seen as more efficient than straight electric locomotives. Diesels will run under the electrified catenary wires of the Northeast Corridor between Perryville MD and Baltimore starting around 2017. The MTA plans to ask Maryland’s Board of Public Works for permission to piggyback on an Illinois DOT contract with Siemens to acquire the locomotives, for an estimated $58 million.

Amtrak, which has been maintaining MARC’s electric locomotive fleet since 1983, will no longer be able to provide the service as of June 2016 because it has retired its own HHP8 locomotives and is phasing out its AEM7s as new Siemens ACS-64 electrics enter service.

The Charger locomotives, which are based technically on the Siemens Eurosprinter, Eurorunner, and Vectron locomotive platforms, feature a 4,400-hp-rated 16-cylinder Cummins QSK95 diesel engine. The QSK95 complies with U.S. EPA Tier IV emissions regulations.

MARC’s four EMD/ASEA-produced AEM7s, like Amtrak’s, are approaching 30 years in age. Its six-unit HHP8 fleet, also like Amtrak’s, is only about 15 years old but has suffered from reliability and availability problems. According to a report in the Baltimore Sun, MTA says that replacing the electric fleet with diesels will improve MARC’s service reliability…” The existing electric locomotives operate only on MARC’s Penn Line (Northeast Corridor).

MARC’s electric fleet has a reported reliability rating of between 40% and 50%.

MARC’s diesel fleet, most of which was replaced about five years ago with 26 MP36PH-3C units from Wabtec subsidiary MotivePower Industries, has a reliability rating of 85%.

MARC’s Charger diesel locomotives are expected to be delivered by late 2017.

For more details, go to: http://www.railwayage.com/index.php/passenger/commuter-regional/marc-replacing-electric-locomotive-fleet-with-high-speed-diesels.html?channel=55&utm_source=WhatCounts+Publicaster+Edition&utm_medium=email&utm_campaign=RGN+8.13.15&utm_content=+MARC+replacing+electric+locomotive+fleet+with+high-speed+diesels Sent from my iPad