Thanks for sharing. The SD9 was a fine looking machine with its high hood and rounded cab roof. I have a question, what were the louvers for along the edges beneath the hand rails?
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I can't tell you exactly why the louvers are on the sill doors, but would expect it might have something to do with permitting better airflow in that area. There is a lot of wiring under there and it was standard to have the engineer side louvered, while they fireman side was not (see 4416). I have a photo of a unit with the doors dropped open and will try and post it one of these days.
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| Posted by Mike on November 16, 2015 | |
They're just vents. The traction motor cables run through there. If you look at the 4416 you can see there are no vents on that side.
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Thank you for the replies. I had never noticed that the vents were on one side only.
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