That's not just any Diesel, that's a Centennial DDA40X

Jesus, you can literally see how happy she is to be back on the rails!

1:34 What??? That sounds like 3985's whistle, she's not dead!! :D 1:44 That's the sound of 844's famous SP counterpart, 4449! It's always fun hearing a little bit of different in a loco.

There is nothing as satisfying as listening and watching the first few movements of a newly rebuilt steam locomotive… May this incarnation be long and fruitful.

844 is a beast and the wide shot at 5:17 just puts into perspective how massive 6936 is as well. Its nice to see her back again and looking mighty fine too!

WOW! How great to see her back in all her glory and hear her whistle again. Thanks Skip for capturing the event and sharing. Great job as usual. Ted

Wonderful to see this magnificent engine back in service!

Skip, you are the friggin' man!!!! Absolutely wonderful shots of this beaut. It's great to see her breathing again!

I wish my grandfather had lived to see this steam renaissance!

she sounds REALLY good with that big boy whistle! Can't remember the last time I heard her sound this healthy!

she is alive!!!

AWESOME !! Thanks for all your videos , Skip

So happy to see her back and running! Excellent video!

And that beautiful whistle sure does work.

Congratulations to Ed and the Cheyenne crew on a successful refit. It is great to see her steamed up again.

Thanks for sharing this great H/D #844 video.

as happy as I am that she's back WHY DID THEY HAVE TO REMOVE HER SIGNATURE MARS LIGHT!

Very cool. • Cheers from The Detroit & Mackinac Railway 🚂

So glad she's back!!!

Nice video cant wait to see her again,btw who would dislike this

So is good to see this beauty once again roll on the rails

She's looking beautiful!!

Wow that whistle sounds really cool and really creepy at the same time

Great video!! Will you chase her to Denver next weekend??

All of the boiler work must have helped 844 looks to be burning cleaner and still making plenty of steam.

I've watched a couple of the return to the rails of the 844 and have a few questions. Is the Steam Whistle a bit off as it sounds like it is a bit airy then I remember it... and It did sound like the Diesel was applying power when it went by, was that because this is still in a test phase or a brake in period? And I must say thankyou to Ed and the crew for sticking with it and bringing back the 844. I for one missed it! Congrats UP!

Nice footage! Can't wait for the Big Boy!

The Beast Returns!

this locomotive is a true epic win

I want to see this beast run up the Moffat someday.

Hey Skip, nice Video. Schön das die 844 wieder rollt. Wie weit ist 4014, wo und wann fährt 4014 wieder ? ( Germany )

Sure nice to see her under steam again!

Wow, I`m glad UP is into hertiage. Great.

I wonder if the crews of these trains ever go on KZfaq and watch videos like this of themselves. "Hi, me!"

Looks like at the end the test didn't fare so well. Fire and it seems as if the Diesel is helping push a bit?

Paint job looks great. Wonder why there's still that knock from the rods on the right side. Boiler is now good for 10 years.

When will 844 get her mars light back? She looks creepy without it.

Looks as though Union Pacific Excursions fleet no. 844 is ready to return to duty - no trouble pulling an auxiliary water tanker, an Electro-Motive SD45 (probably in full dynamic brake for purposes of the post-overhaul test run), and two engineering cars. Sure hope the UP's getting the roadbed tools ready to rebuild the Mococo line, Martinez - Tracy, CA, USA, from the foundations - it was originally built to handle Baldwin light 2-8-2's at best and would break up beneath the pounding drivers of one of the UP's 4-8+8-4 American Single Expansion Articulateds Class BSA-1; some portions are already stop-staked as washouts waiting to happen.

Might I ask why they are running a diesel behind the steam engine? Is it incapable of running on its own?

they have the diesel for 2 reasons; 1, in case something happens to disable the 844; 2, to supply electricity to the passenger cars.

MARTY! IT RUNS ON STEAM!!

Happy again , Mr W ? (!)

Waiting for the Big Boy 4014 ! Any time soon?

Wow.

THE LEGAND HAS RETURNED!

Damn they took off the Emergency Light

i hate to ruin the party, but has anyone noticed that 6936's engines were notched up when taking off and as she got up to speed, why is the 844 being pushed?? i thought "break in"runs we're done from light load to heavy load and repeated???

can UP 844 pull the Excursion trains without diesel helpers?

whats the diesel unit for wouldn't it be able to pull a load without a diesel engine if its the carriages being heavy and modern make some old fashioned ones for it and have it pull stuff without the help of a diesel

Anyone know what whistle she is wearing? The sound of it just seems off for some reason. Don't know if it's a different whistle or not.

Good to see it back. Hopefully the testing was deemed successful and next time they can leave the diesel at home?

Union Pacific 844 returns to rails

Why is it always with the dda40x????

No Mars light for 844

any reason why they removed the mars light?

Excellent. How darn sexy is it that you see a 4 8 4 Northern in the same consist as a DD40X? Makes you think that the UP still has a lot of confidence in the DD40 X which is still a very good locomotive. The primes in the DD 40 were some of the best power plants ever produced by EMD. Were in not for the commies at the EPA, EMD would still be in business in the US. Glad to see though the Progress Locomotive is building a very much in demand SD 70 series for which there is a considerable waiting list. More power, less fuel, more automation and better serviceability then any locomotive GE has ever built. And that comes from the engineering staff at BNSF.

Hey this is great but can someone tell me why is there a Diesel engine behind the 844

its time it earned some money back on fright working pulling containers

Where's the Mars light

M

now there is greener fuels made from wast bio-fuel pelts that locos will burn and get high presser steam from so the Steam locomotive still will have a future there very powerful locomotives and there underestimated with the power output , new all welded boilers and new type of firebox and superheaters are now been used in Tornado and Flying Scotsman there giving out more power than ever before we Need New Steam locomotives , So how about Union pacific !