Back to Home

Back to
NS Roster Summary

Send an Email

Become a fan of on


EMD/NS MP21E No. 2423

1 Unit - Currently Stored

NOTE: Unit is stored pending sale/retirement/disposition



This roster compiled and maintained by Chris R. Toth
Roster last updated on November 8, 2019.


Active Roster


Road No.



Original NS Subsidiary Build Date Rebuild
Order No. Builder No. Notes
2423 NS EMD MP15DC 2423

SOU 2423

SOU 04-1982 03-2012 817015 817015-20 Unit stored pending sale/retirement/disposition.

General Info

NS Model Designation = MP21E (See below)
Horsepower = 2,100
Fuel Tank Capacity = 1,300 gallons
Dynamic Braking = No
Control = Single
Cab Signals = No
LSL (Locomotive Speed Limiter) = No

Equipped with cab air conditioning.

Equipped with an electric parking brake.

Equipped with EMD Blomberg type-B  trucks.

Equipped with the Traction and Engine Control Unit (TECU) from TMV Control Systems.

Equipped with alignment control draft gear. 

Equipped with AR10 alternator in place of original D32U main generator.

Units meets EPA Tier 2 Emissions Standards

This unit was initially rebuilt in 2011 with a turbocharged 12-cylinder EMD 645E3C engine with a larger
cooling system, and was rated at 2,500 horsepower for testing. It has since been derated to 2,100 horsepower,
but the modified carbody with larger cooling system has been retained (though it now has one
large cooling fan instead of the three smaller fans it had when first rebuilt).

Unit was re-designated as an MP21E in November 2013 to more accurately reflect its 2,100 horsepower.



Back to top of page

Please Note: This is the personal website of Chris R. Toth. It is not affiliated with, sponsored nor supported by Norfolk Southern Corporation.

Information and photos from this website should not be used without permission and/or proper credit.