Friday, January 30, 2026

Likely the reason diesel Hydraulic locomotives weren't used more here in the U.S. is maintenance costs

When you have hydraulics (especially a train locomotive) it makes sense that the hydaulic lines would be expensive to replace when they blow out from constant pressure at a really large pounds per square inch. Since on Tractors most of these hydraulic lines are made (at least partially of rubber for the flexibility, this could be a problem with the pressure loads regarding the amount of weight a train is needing to pull.

So, unless you really had amazing hydraulic hoses it would be expensive. And since the only hydraulic hoses of this kind would likely be made in Germany or Austria importing these heavy duty hydraulic cables might be very expensive indeed (as well as the time consumed waiting for these items coming all the way from Europe when you have schedules to keep when hydraulic lines blow. 

In some ways it's kind of like when my son totaled his Nissan Truck. The insurance money came and we replaced his truck with a stick shift Diesel VW Rabbit because we didn't want to have it be dangerous with too much power for him because he was a relatively new driver then. However, the first thing was that this was literally the most gutless car I have ever driven and on even a 1% grade you often would have to shift down into 3rd gear at this point which is ridiculous. And on top of this I didn't understand that the single most important thing about owning a diesel engine Vehicle is that you change the oil often because of the Carbonization of the oil in a diesel. I didn't know anything about Diesels and realized we shouldn't own one within 6 months of buying this car with the insurance money so we sold it.

The point is all this hardware was European and if you don't know enough about it it isn't that helpful in keeping it running properly whether it is a 1971 Diesel Rabbit or a Diesel Hydraulic Train built in Europe. 

Partial government shutdown begins as funding lapses despite Senate deal (as of Midnight Eastern Time) Friday night:

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do diesel hydraulic train engines exist?

IN Knight and Day(2010) the are talkung about a diesel Hydraulic Train Locomotive engine. I didn't know something like that even existed. So, I checked and something like this does exist when extra torque for mountains is necessary and useful. Interesting.

I only knew it would be theoretically possible to build and engineer something like this after working with Tractors landscaping Contractor in San Diego county when I was in my late 20s and early 30s. 

Because Tractors lifting capabilities like on Backhoes and loaders are Diesel Hydraulic Too! 

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Diesel hydraulics: Diesels that didn't - Trains
Yes, diesel-hydraulic train engines exist, primarily utilized for locomotives and multiple-unit trains where lighter weight, higher acceleration, or specific torque characteristics are required, such as on German and European mountain railways. They operate by connecting a diesel engine to a hydraulic transmission (torque converter) rather than an electric generator. 
Key Characteristics and Usage:
  • Transmission Mechanism: They use hydraulic fluid in a converter to transmit engine power to the wheels.
  • Advantages: Lighter weight compared to diesel-electric, excellent starting tractive effort, no wheel-slip under load, and high acceleration, making them ideal for hilly, mountainous terrain.
  • Regional Popularity: Germany was a leader in this technology (e.g., V200 class), developing them post-WWII, and they are still used in parts of Europe, India, and Japan.
  • Applications: Primarily used for passenger railcars (DMUs) and light switcher engines, rather than heavy freight hauling, which is dominated by diesel-electric.
  • North American Context: While mostly used in Europe, some diesel-hydraulic locomotives, such as the German-built Krauss-Maffei models, were used in North America in the 1960s, though they were not widely adopted. 

While they offer advantages, their, often higher maintenance costs led to the dominance of diesel-electric technology, according to the YouTube video from 2018 and the Reddit post. 
  • How Diesel Hydraulic locomotives work
    Oct 1, 2018 — direction a diesel hydraulic locomotive is lighter than a corresponding diesel electric locomotive. because it does not have to ca...
    YouTube·The Train Story
4:20
3m

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  • A Query About 'Diesel-Hydraulic' Locomotives : r/trains - Reddit
    Oct 5, 2025 — OP you are completely correct. The vast majority of "diesel hydraulic" locomotives and DMUs are diesel engines coupled to final dr...
    Reddit
  • How EVERY TYPE of Diesel Locomotive Works! (Part 3)
    Apr 28, 2023 — but they still ain't as good as diesel electric. today they're mostly used in Germany and Finland though some neighboring countrie...
    YouTube·Southern Plains Railfan
  • Catherine O'Hara, comedy star of 'Home Alone' and 'Schitt's Creek,' dies at 71

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    Catherine O'Hara, comedy star of 'Home Alone' and 'Schitt's Creek,' dies at 71

    The beloved actor also appeared in "Beetlejuice," "Best in Show" and, most recently, the Emmy-winning Apple TV+ series "The Studio."

    Elon Musk expressed interest in visiting Jeffrey Epstein's island, newly released emails show

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    Elon Musk expressed interest in visiting Jeffrey Epstein's island, newly released emails show

    Musk has denied numerous times that he ever visited the island and has said that he “refused” invitations.

    Senate passes bill to resolve shutdown clash, punting on DHS for two weeks

    If the Democrats decide to de-fund ICE it basically (temporarily ceases to exist) within 2 to 3 weeks! 

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    Senate passes bill to resolve shutdown clash, punting on DHS for two weeks

    The House plans to vote when it returns Monday. That means a government shutdown this weekend, which will have little impact if it remains brief.

    El Dorado G 1966 movie

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