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Combustion air intake modifications on units 425 & 428?
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   Combustion air intake modifications on units 425 & 428?
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   Author  Topic: Combustion air intake modifications on units 425 & 428?  (Read 144 times)
JKR251C
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Combustion air intake modifications on units 425 & 428?
 
« on: Dec 31st, 2016, 4:50pm »
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I'm going strictly off of photos at this point, but it appears that both the 425 and the 428 have received some combustion air intake modifications recently. I'm guessing those are large rectangular filter panels mounted on both sides (towards the rear) of each respective locomotive.
 
If that's the case, I'm curious as to why the LAL opted for large externally mounted filters when the Century line already featured an internal air cleaner/exhauster for the engine combustion air?
 
Any insight or corrections would be welcome. Thanks.
 
JR


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towny72
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Re: Combustion air intake modifications on units 425 & 428?
 
« Reply #1 on: Dec 31st, 2016, 6:08pm »
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JR.
 
 
Do you have any photos or links to photos of the comparisons?
 


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JKR251C
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Re: Combustion air intake modifications on units 425 & 428?
 
« Reply #2 on: Dec 31st, 2016, 7:29pm »
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I'll refer to this Dave Seitzer photo of the 428.
 
http://www.rrpicturearchives.net/showPicture.aspx?id=4538903
 
Looking just to the right of the last "E" in Lakeville, one sees a large rectangular 'fixture' where the combustion air intake is normally located on Century units. The original ALCO intake is a much smaller rectangular opening than what currently appears in this photo of the 428. The 425 seems to have the same modification.
 
Just curious as to why the LAL made this modification, and if it is a filter why opt for something that large?
 
JR


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