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EMD SD40 series official thread (covers all variations)

Discussion of Electro-Motive locomotive products and technology, past and present. Official web site can be found here: http://www.emdiesels.com/.

Moderator: GOLDEN-ARM

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Re: Question about sd40-2's

 #285745  by Steve F45
 
Bryanjones wrote:
2005Vdub wrote:The other day i watched a CSX q train roll down thru ridgefield park. It had 2 sd40-2's, but the leader had a much smaller body then the trailing engine. The leader had the huge front and rear platforms, while the trailer was kinda normal looking.

Why is this? Or was this a different engine altogether?
from your description it sounds like you saw an SD40 rebuilt to SD40-2 specs and classed as SD40-2. There are hundreds of these rebuilds running around. Anyhow, the SD40 (as well as SD38,SD39 and SD45) rides on a a shorter frame than a true SD40-2. The longer frame gives the SD40-2 the front and rear porches.

Bryan Jones
Brooks,KY
thanks, thats probably what i saw then.

 #286058  by trainiac
 
Any standard SD40-2 will have those long porches--except for the snoot versions, where the longer nose takes up a lot of the front platform. The SD40 has large porches as well, but not as large as the SD40-2. An SD45-2 rebuilt to SD40-2 specs would have porches the size of a Geep--in other words, just enough space to walk around.

 #286447  by GOLDEN-ARM
 
That third picture you have there, U-haul, sure doesn't look like any SP unit I ever ran. Where is the Gyra-Lite,(or the spot on the nose, where it resided?) or the mounts for the red emergency oscillating lite?(over the top of the headlights) Don't see the cab vents either, or the spots where they have blanked over.(the one on the front cab wall is for the old cab heater, not what I'm talking about) Looks like a CSX unit, to me...............
For what it's worth, the 40's DO have porches. Perhaps you saw an SD-35 rebuild, or a SD-45 rebuild, with 40-2 reporting marks, on side of cab?....

 #286487  by Bryanjones
 
GOLDEN-ARM wrote:That third picture you have there, U-haul, sure doesn't look like any SP unit I ever ran. Where is the Gyra-Lite,(or the spot on the nose, where it resided?) or the mounts for the red emergency oscillating lite?(over the top of the headlights) Don't see the cab vents either, or the spots where they have blanked over.(the one on the front cab wall is for the old cab heater, not what I'm talking about) Looks like a CSX unit, to me...............
For what it's worth, the 40's DO have porches. Perhaps you saw an SD-35 rebuild, or a SD-45 rebuild, with 40-2 reporting marks, on side of cab?....
if you are reffering to that photo link above of the CSX #8469, its from a group of 50 SD40-2 rebuilds that CSX aquired from Morrison Knudsen in the very early 1990's. All 50 were rebuilt from SD40's and SD45's aquired by MK for the project as CSX did not supply core units for this program. All SD45's were rebuilt with SD40 style carbodies and had the cab and nose assemblies cutoff and rewelded to the frame to meet SD40 measurements and whatnot. Any carbody features that might allow one to tell the heritage of the unit are gone, as the requirement was for 50 identical locomotives, so thats why you see no trace of where a gyralight was once located.
And while an SD40 does have porches, they are not nearly as large as those of the SD40-2 due to the fact that the SD40-2 has a frame that is roughly 3 feet longer than the SD40. Side by side the difference is quite obvious.

Bryan Jones
Brooks,KY

 #288141  by ExEMDLOCOTester
 
trainiac wrote:Any standard SD40-2 will have those long porches--except for the snoot versions, where the longer nose takes up a lot of the front platform. The SD40 has large porches as well, but not as large as the SD40-2. An SD45-2 rebuilt to SD40-2 specs would have porches the size of a Geep--in other words, just enough space to walk around.
Did the SD45-2's have the angled radiators? If so were they chopped for the SD40-2 conversion?

 #288199  by alcodude
 
:-D
Last edited by alcodude on Wed Jan 10, 2007 5:56 pm, edited 1 time in total.

 #288201  by Steve F45
 
Well i wish i wrote down the csx loco # i saw a lil while ago. Exactly what i saw last week. The nose barely makes it to the front most wheel and the long hood barely reaches the rear most wheel.

 #288205  by emd_SD_60
 
ExEMDLOCOTester wrote:
trainiac wrote:Any standard SD40-2 will have those long porches--except for the snoot versions, where the longer nose takes up a lot of the front platform. The SD40 has large porches as well, but not as large as the SD40-2. An SD45-2 rebuilt to SD40-2 specs would have porches the size of a Geep--in other words, just enough space to walk around.
Did the SD45-2's have the angled radiators? If so were they chopped for the SD40-2 conversion?
SD45-2's had flat radiators, like the SD40. I have seen pics of SD45T-2's (in the leasing market) retrofitted with standard SD40-2 radiator assembles, needless to say they had big-ass porches on the back! :-D A-ha, found it!

http://uptrain.rrpicturearchives.net/sh ... x?id=88058

http://uptrain.rrpicturearchives.net/sh ... x?id=88069

http://uptrain.rrpicturearchives.net/sh ... x?id=88075

 #288356  by Steve F45
 
neither of those are what i saw. But my god that is a huge porch.

the front and rear porches i saw were same size just alot bigger then the sd40-2's i've seen.

im going to look on rrpicturearchives.com tonight to see if i can find it.

 #288890  by trainiac
 
Not to nit-pick here, but no EMD locomotive ever had angled rads. The radiator intakes on the SD45 were angled, but not the rads themselves.
Actually, just about every EMD locomotive I can think of DOES have angled radiators. The radiators are often arranged in a lengthwise "V", like this...

http://sp5472.ncry.org/photos/P044170006.jpg (SD9)
http://locopage.railpage.org.au/photos/BHP_SD70ACe.jpg

The flared radiator intakes on some EMD's allows for a wider "V" and hence more cooling capacity within a compartment of the same length and height.

 #289126  by emd_SD_60
 
The later model SD70M's had flared radiators.

 #290797  by ExEMDLOCOTester
 
alcodude wrote:
ExEMDLOCOTester wrote: Did the SD45-2's have the angled radiators? If so were they chopped for the SD40-2 conversion?
Not to nit-pick here, but no EMD locomotive ever had angled rads. The radiator intakes on the SD45 were angled, but not the rads themselves.
The only vertical radiator I recall was on an SW 1000. The Rads were configured in a "V" to maxiimize the amount of copper they could cram in the long hoods for maximum cooling.
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