F40PH-2C & F40PHM-2C "Rebuilds" Discussion

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F40PH-2C & F40PHM-2C "Rebuilds" Discussion

Postby ck4049 » Thu May 03, 2012 9:49 pm

Hi there! This question has been in my head for quite awhile now: What was done to the F40 Rebuilds when they were rebuilt between 2000-2004? Any answers are very much appreciated!
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Re: F40PH-2C & F40PHM-2C "Rebuilds" Discussion

Postby mbta1051dan » Fri May 04, 2012 1:16 pm

Repainted, extra engine room door added for sound protection, advanced ACSES displays, new CAT 3412 HEP generators (which I hear will be replaced soon with the now-standard CAT C-18s), and pretty much general mechanical and/or structural overhaul/reinforcement.
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Re: F40PH-2C & F40PHM-2C "Rebuilds" Discussion

Postby ck4049 » Fri May 04, 2012 2:11 pm

Thanks 1050!
Was the new engine room door added between the prime mover and the main generator/turbocharger, or is it the one between the air compressor & HEP generator?
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Re: F40PH-2C & F40PHM-2C "Rebuilds" Discussion

Postby mbta1051dan » Sun May 06, 2012 12:47 pm

ck4049 wrote:Thanks 1050!
Was the new engine room door added between the prime mover and the main generator/turbocharger, or is it the one between the air compressor & HEP generator?


Extra door between the cab and the prime mover.
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Re: F40PH-2C & F40PHM-2C "Rebuilds" Discussion

Postby ck4049 » Sun May 06, 2012 4:54 pm

Oh OK, thanks again! I also noticed the engine room door latches in the cab & other cab details(no defroster beneath the windshield, radio arrangement on the control stands, etc;) on the Morrison-Knudsen 1025-1036 series were different from the rest of the fleet.
Last edited by ck4049 on Mon May 07, 2012 3:29 pm, edited 1 time in total.
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Re: F40PH-2C & F40PHM-2C "Rebuilds" Discussion

Postby mbta1051dan » Mon May 07, 2012 6:35 am

You're welcome. The difference there were between, the 1025 and 1050 series units I think have been standardized, since M-K (now MPI) rebuilt them all, so the specs probably match their latest model at the time, the F40PH-3C. They retained their control stands, though, I was worried they would end up with desktops like the Coaster, ACE and Caltrain units. Real F40s have a control stand!

I also wonder if the turbocharger or exhaust system may have been redesigned, there is a much lower bass exhaust note with these engines than anything else in the fleet, and it didn't seem like that before! If you are in a K-car behind a rebuild coming into say Back Bay or Porter Square the vibrations will rattle the car like it's coming apart!
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Re: F40PH-2C & F40PHM-2C "Rebuilds" Discussion

Postby ck4049 » Mon May 07, 2012 5:47 pm

mbta1051dan wrote:You're welcome. The difference there were between, the 1025 and 1050 series units I think have been standardized, since M-K (now MPI) rebuilt them all, so the specs probably match their latest model at the time, the F40PH-3C. They retained their control stands, though, I was worried they would end up with desktops like the Coaster, ACE and Caltrain units. Real F40s have a control stand!

I also wonder if the turbocharger or exhaust system may have been redesigned, there is a much lower bass exhaust note with these engines than anything else in the fleet, and it didn't seem like that before! If you are in a K-car behind a rebuild coming into say Back Bay or Porter Square the vibrations will rattle the car like it's coming apart!


MK did make a few minor modifications to the control stand before they started making major changes. I have to agree that real F40s have the control stands! The turbocharger is definitely different from the screamers(obviously since the turbocharger is one of the LOUDEST components), though I don't look at the ones in the MK units too often.
The vibrations feel like a small earthquake when youre sitting in the coach behind a rebuild!
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Re: F40PH-2C & F40PHM-2C "Rebuilds" Discussion

Postby diburning » Mon May 07, 2012 9:10 pm

If you're in the coach behind a rebuild, and the train goes under a bridge or into a tunnel, it vibrates the entire coach.
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Re: F40PH-2C & F40PHM-2C "Rebuilds" Discussion

Postby ck4049 » Mon May 07, 2012 9:14 pm

Yeah and it feels like your cell phone vibrate is going off! The HEP is what causes the vibrations, with a little help from the main generator & turbocharger.
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Re: F40PH-2C & F40PHM-2C "Rebuilds" Discussion

Postby AEM7AC920 » Tue May 08, 2012 5:14 am

Actually the hep isn't what causes the vibrations it's more prime mover related. Know you all can't notice unless you have been in the cab going through a tunnel but usually right around the 2nd notch is when you get the deepest sound and vibration.
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Re: F40PH-2C & F40PHM-2C "Rebuilds" Discussion

Postby mbta1051dan » Wed May 09, 2012 12:44 am

The HEP causes the vibrations on the GP40MCs, on the F40 rebuild it is the prime mover, and yes most pronounced in the 2nd notch! I seem to notice when some engineers run these they go right from idle or 1 to 3, before moving to any of the other notches, cause the vibrations are intense in the cab!
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Re: F40PH-2C & F40PHM-2C "Rebuilds" Discussion

Postby AEM7AC920 » Wed May 09, 2012 5:06 am

Going from notch 1 to roughly 3 has nothing to do with what engine is on point it's more train handling procedures and stretching the slack out when taking off from a stop.
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Re: F40PH-2C & F40PHM-2C "Rebuilds" Discussion

Postby ck4049 » Wed May 09, 2012 8:26 pm

The 1074's prime mover had something very wrong with it and right now it is sitting in the Wheel/Axle/Motor Shop at BET. I hear it is supposed to get an new prime mover & main generator.
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Re: F40PH-2C & F40PHM-2C "Rebuilds" Discussion

Postby mbta1051dan » Thu May 10, 2012 9:11 am

ck4049 wrote:The 1074's prime mover had something very wrong with it and right now it is sitting in the Wheel/Axle/Motor Shop at BET. I hear it is supposed to get an new prime mover & main generator.


Any idea what went wrong with it?
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Re: F40PH-2C & F40PHM-2C "Rebuilds" Discussion

Postby ck4049 » Thu May 10, 2012 3:33 pm

All I heard was that it had a major engine failure back in late September. Im thinking this was the same locomotive that caused the Worcester Line to be delayed by over three hours this past fall.
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