UP SD40N?

[Lyon_Wonder]

UP 1638's a recently rebuilt SD40-2, and locophotos refers to it as a SD40N.  Is SD40N UP’s official designation for the rebuilt SD40-2s?  I guess the “N” stands for newly rebuilt:)

http://www.locophotos.com/PhotoDetails.php?PhotoID=121441

[silicon212]

Rebuilt to -3 standards with part 1033 devices installed.

[YoHo1975]

Yes, SD40N is what they have called all of the rebuilds. Roseville Yard has a bunch.

[MJChittick]

According to "The Diesel Shop", the SD40N designation has been applied to SD40-2s which have been rebuilt at UP's Jenks Shops in Little Rock AR.  No details are given regarding the specifics of the actual work performed.

[Bryan Jones]

silicon212

Rebuilt to -3 standards with part 1033 devices installed.

 

the UP SD40N's do have 1033 part added but they have NOT been upgraded to DASH 3 specs. These units still maintain a DASH 2 electrical cabinet with no microprocessors added.

 

Bryan Jones

[uphogger]

Could the "N" possibly refer to North Little Rock, which is where the shops are located?  Most repaints bear the date done followed by the initials "NLR". 

[Big Red3]

These locomotives have been rebuilt from the SD40-2 to include a ZTR Nexsys III-i control system, hence the SD40-N.  The Nexsys replaces all the dash 2 cards and includes an AESS system.

[samfp1943]

[quote user="Big Red3"]

These locomotives have been rebuilt from the SD40-2 to include a ZTR Nexsys III-i control system, hence the SD40-N.  The Nexsys replaces all the dash 2 cards and includes an AESS system.

[/quote]

BigRed3;

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