Key takeaways
- Six axles are the main feature: hardly any other modern diesel locomotive in Germany runs on two three-axle bogies.
- Diesel-hydraulic rather than diesel-electric: the Maxima transmits its power through a torque converter – Voith's core expertise.
- The 30CC is the smaller sister of the Maxima 40CC; both share the basic form and running-gear concept.
- Very small numbers: the Maxima remained a niche product and never became a large series.
- Keepers and duties change – check the current situation before you go looking for one specifically.
Contents
Fact file
| Vehicle type | Heavy main-line diesel locomotive for freight |
|---|---|
| Manufacturer | Voith Turbo Lokomotivtechnik, Kiel |
| Type family | Voith Maxima (30CC and 40CC) |
| Wheel arrangement | C'C' (six axles in two three-axle bogies) |
| Transmission | hydraulic via Voith torque-converter transmission |
| Engine concept | one large, slow-running diesel engine |
| UIC type code | 92 – diesel locomotive |
| Numbers | very small quantity, no large series |
Identifying features
Is this really the class in front of you?
- Six axles in two three-axle bogies – the rarest feature among modern German diesel locomotives
- Very long body with a raised cooling tower at the rear
- Cab at one end, with a long continuous engine-room body in front of it
- Heavy ventilation grilles on the sides along almost the entire length of the body
- Vehicle number begins with 92 – the UIC code for a diesel locomotive
Updated: August 2026 – Six axles, a very long body and an engine note that sounds more like a ship than a locomotive: the Voith Maxima 30CC is one of the most unusual diesel locomotives running in Germany. This page shows you how to recognise it, how to classify it technically and why a sighting is worth more than with any series-production locomotive.
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What is the Voith Maxima 30CC?
The Voith Maxima 30CC is a six-axle, diesel-hydraulic main-line locomotive from the Kiel locomotive plant of Voith Turbo. It was designed for heavy freight duties on non-electrified lines and, together with the more powerful Voith Maxima 40CC, forms a two-member type family.
Technically, it’s an exception. While the world market for heavy diesel locomotives relies almost entirely on diesel-electric transmission – that is, diesel engine, generator, traction motors – the Maxima works with a torque-converter transmission. That was precisely Voith’s argument: to put maximum power through a hydraulic transmission instead of taking the detour via electrics.
How to identify it in the field
With the Maxima, identification is easier than with almost any other modern diesel locomotive, because a single feature decides almost everything.
Count the axles
Six axles, spread over two three-axle bogies. Modern German diesel locomotives overwhelmingly have four axles – six axles are almost proof in themselves.
Look at the body
A single cab at one end, with a continuous, very long engine room in front of it and extensive ventilation grilles. No centre cab, no two short hoods.
Look for the cooling tower
The cooling system sits clearly raised at the rear of the body. You'll recognise this silhouette even from a good distance.
Check the number
The twelve-digit vehicle number begins with 92 for a diesel locomotive, followed by 80 for Germany. The vehicle keeper marking and running number are in the data panel.
If you go through this sequence – axles, body, number – for every unfamiliar vehicle, you’ll almost always get there. The systematic version is in the guide to identifying rolling-stock classes; the structure of the twelve-digit number is explained in the article on the UIC number.
Its place in rail operations
A locomotive of this type isn’t a general-purpose vehicle. It’s built to move a heavy trailing load over longer distances without overhead wire – and that’s exactly what determines where you’ll find it.
| Area of use | Suits the Maxima? | Reason |
|---|---|---|
| Heavy freight trains without overhead wire | very well | Exactly the design purpose of the type |
| Engineering and diverted services | well | Electric traction is lost during closures |
| Port and industrial connections | well | High train weights, short distances |
| Classic shunting | poorly | Too big and too heavy for shunting work |
| Passenger services | very rarely | Not the intended application of this type |
Other concepts used to compete in the same market segment, such as the diesel-electric Bombardier DE-AC33C Blue Tiger. Compare the two and the difference in philosophies becomes tangible: hydraulic versus electric transmission, for a similar task.
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The Maxima in the German diesel locomotive system
To understand why the Maxima stands out so much, it helps to look at the order in which German diesel locomotives have traditionally been arranged.
Until 1968 they carried V designations: V 60 for the heavy shunting locomotive, V 100 for the general-purpose locomotive of medium power, V 200 for the large main-line locomotive for long-distance services. The number was a rough indication of power, and the V simply stood for “Verbrennungsmotor” (internal combustion engine). With the renumbering of 1968, these became computer-friendly three-digit class numbers – the V 100 became Classes 211 and 212, the V 200 became Classes 220 and 221. Anyone who puts old photos and current markings side by side still stumbles over this double naming today.
Running in parallel is a second distinction that’s almost more important for spotters: main-line locomotive versus shunting locomotive. Main-line diesel locomotives are designed for longer runs, higher speeds and through train workings, and carry the type code 92 in the UIC system. Shunting and small locomotives, on the other hand, get 98. Despite its size and weight, the Maxima is clearly a 92 – built to haul trains along lines, not to sort wagons.
The third dividing line is the transmission. German main-line diesel locomotives were traditionally diesel-hydraulic: the engine drives a torque converter, and the power goes to the axles via cardan shafts. Internationally, by contrast, the diesel-electric design with a generator and traction motors won out. The Maxima thus stands at the end of a very German line of development – and at its most powerful point.
In practice, that means: when you see a modern, very large diesel locomotive, it’s always worth asking about the manufacturer. Kiel type designations with G stand for hydraulic transmission locomotives (“Getriebelok”), those with DE for diesel-electric machines. This small rule saves a surprising amount of guesswork in the field.
Spotting and photography
Large diesel locomotives are rewarding subjects but need some preparation. The long body fits poorly into a tight frame, and the interesting details – bogies, cooling tower, data panel – are far apart. The basics of viewpoint, focal length and exposure are in the guide to good photos of trains; in direct comparison with the compact Voith Gravita 15L BB, you’ll quickly notice how much more room the Maxima needs in the frame.
Stand further back than usual
The long body needs distance. From too close, the perspective tips and the rear end disappears from the frame.
Keep the bogies visible
The six axles are the distinguishing feature. A viewpoint where the platform edge or vegetation hides the running gear throws away exactly that information.
A second shot of the data panel
The full number including the vehicle keeper marking makes your sighting verifiable – especially with vehicles that change keepers.
Safety and the current situation
Tracks, operational facilities, stabling sidings and depots are off-limits or private property. Photograph only from publicly accessible locations. And: the keeper, livery and area of operation of these locomotives change – don't rely on older information, check the current situation.
Common mix-ups
It points to the Maxima if …
- you count six axles in two three-axle bogies
- the body looks unusually long and modern and angular
- a single cab sits at one end
- the number begins with 92 80
Look more closely if …
- you can't reliably tell whether it's a 30CC or a 40CC in front of you
- the locomotive is in a customer livery with no reference to the manufacturer
- you only see it against the light or from diagonally behind
It's not a Maxima if …
- you count four axles – then you're looking at a Gravita, a Vossloh G type or similar
- the locomotive has a centre cab between two hoods
- the number begins with 98, indicating a shunting or small locomotive
Conclusion
The Voith Maxima 30CC is one of the last large diesel-hydraulic designs built in Germany – and so a vehicle you only really appreciate once you know what’s unusual about it. Six axles, hydraulic transmission and a very small production run make it a target you don’t tick off in passing, but plan for.
In short
Six axles plus a modern long body: that's the Maxima. Because only a few exist and both keeper and duties change, the rule applies here more than anywhere – note the number, add the date, secure a photo.
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Summary
- The Maxima 30CC is one of the heaviest diesel-hydraulic locomotives ever built in Germany.
- Counting the axles is usually enough for identification: six axles plus a modern, angular body narrow the field drastically.
- It was designed for heavy freight trains and engineering duties without overhead wire, not for shunting.
- Because only a few machines exist, sightings are rare and particularly worth documenting.
Frequently asked questions
How do I recognise a Voith Maxima 30CC?
Quickest via the six axles in two three-axle bogies. Modern German diesel locomotives almost all have four axles, so six axles are a very strong clue. Add to that the unusually long body and the cab at one end. Everything is confirmed by the vehicle number.
What does the designation 30CC mean?
The CC stands for the C'C' wheel arrangement, i.e. two three-axle bogies. The number indicates the power class within the Maxima family; the 40CC is the more powerful version. The system therefore follows the same principle as other manufacturers' designations: a power indication plus a wheel-arrangement code.
Is the Maxima diesel-electric or diesel-hydraulic?
Diesel-hydraulic. Voith makes torque-converter transmissions, and the Maxima was its technical showpiece for them. That sets it apart from many modern competitors, which rely on diesel-electric transmission with a generator and traction motors.
Where are Maxima locomotives used?
Typical duties are heavy freight trains on lines without continuous electrification, engineering and diverted services, and connections to works and ports with high train weights. Specific duties depend on the current keeper and change with contracts – so always check the current situation.
How many Maximas were built?
The number stayed very small. The Maxima never reached the status of a large series, and Voith later withdrew from locomotive building again. That's exactly what makes every sighting valuable for spotters.
What's the difference from the Voith Gravita?
The Gravita is the much smaller, four-axle shunting and trip-working locomotive with a centre cab. The Maxima is a six-axle heavy main-line locomotive with a cab at one end. You practically can't mix them up – the size differences are considerable.
Why do you see so few of these locomotives?
Because only a few were built and they run in specialised services. If you want to see one specifically, go by current sighting reports from the community rather than route maps – your hit rate depends almost entirely on where the machine in question is currently allocated.
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