Key takeaways
- The type code is readable: the number equals engine power in hp, the letter equals the number of coupled axles.
- The keeper marking is written on the vehicle and names the operator – it changes with every sale.
- Livery proves nothing: industrial locomotives are regularly repainted at every change of keeper or overhaul.
- Type code 98 identifies diesel shunting and light locomotives, while 92 denotes diesel main-line locomotives.
- Only the builder's number and the type stay constant – everything else on the vehicle is subject to change.
Contents
Fact file
| Vehicle type | Diesel locomotive for shunting and transfer service |
|---|---|
| Manufacturer | Maschinenbau Kiel (MaK) |
| Type code | Number = engine power in hp, letter = number of coupled axles |
| Wheel arrangement | D – four coupled axles in a rigid frame |
| UIC type code | 98 (diesel shunting and light locomotive) |
Identifying features
Is this really the class in front of you?
- Four axles in a rigid frame, linked by coupling rods
- Data panel on the side wall with keeper marking, number and inspection dates
- Long bonnet, with the cab set behind it featuring wraparound windows
- Builder's plate names MaK or Maschinenbau Kiel
- Shunting steps and grab handles at all four corners of the vehicle
- Setting: industrial, port and private-siding railways, transfer workings
Updated: August 2026 – The same locomotive, three years later, different livery, different number, different company name on the side: for industrial vehicles like the MaK 650 D, that’s the normal case. This page shows which markings on the vehicle actually mean something and which are just a snapshot in time – and how to tell the two apart.
Read the markings? Save them straight away.
Keeper marking and number change – your sighting records today's situation for good.
What is the MaK 650 D?
The MaK 650 D is a four-axle diesel locomotive for shunting and transfer service from Maschinenbau Kiel’s type programme. The type code follows the familiar logic: the number denotes engine power in metric horsepower, and the letter D denotes the four coupled driving axles in a rigid frame.
Within the UIC type codes it belongs to group 98 for diesel shunting and light locomotives – as distinct from 92 for diesel main-line locomotives. Vehicles in this group often change owner several times over their long lives: from the works railway to a leasing company, from the leasing company to a track-building firm, from there to a preservation society. Every change leaves its mark on the vehicle. At the end of this chain there is often a heritage railway such as the Bremerhaven-Bederkesa heritage railway, which keeps a long-withdrawn machine running.
Reading the data panel
On the side wall of every registered locomotive there is a block of information that reveals far more than the eye-catching fleet number on the front.
Twelve-digit vehicle number
This is the network-wide unique identifier. The first two digits name the vehicle type – 98 for shunting locomotives.
Keeper marking
A letter code names the vehicle's operator. It usually sits right next to the number and changes with the owner.
Technical markings
Tare weight, brake weights, brake type and length over buffers. These figures only change following structural work.
Inspection dates
The date of the last inspection and its deadlines. They tell you whether a vehicle is running in service or heading for withdrawal.
How the twelve-digit number is built up in detail, and how to check its check digit, is explained in the article on reading the UIC number and its check digit.
One panel, four pieces of information
A single sharp telephoto shot of the data panel replaces a lot of notes. Shoot at a right angle to the side of the vehicle and avoid direct sun on glossy paint – reflections quickly make embossed and printed lettering unreadable.
What stays constant and what doesn’t
For documentation purposes, what matters is which markings stay with a vehicle for life and which only describe its current state.
| Marking on the vehicle | Meaning | How long it stays valid |
|---|---|---|
| Builder’s number on the builder’s plate | Unique manufacturer identifier | For life |
| Type designation | Power class and running gear | For life, except after conversions |
| Twelve-digit vehicle number | Registration in the vehicle register | Until re-registration |
| Keeper marking | Current operator | Until the next change of keeper |
| Keeper’s fleet number | Internal designation | Only with the current keeper |
| Livery and lettering | Company branding | Often only a few years |
Capture today's status
Keeper, number and livery change – your documented sighting stays put.
Comparable vehicles in the MaK programme are the three-axle MaK 650 C and the MaK 600 D with the same wheel arrangement. How MaK approached the same theme with split running gear in the later G programme is shown by the MaK G 1100 BB.
Spotting: following vehicles over time
Because so much changes on industrial locomotives, repeatedly sighting the same vehicle is genuinely interesting. Anyone who documents a machine over the years sees changes of keeper, repaints, retrofits and expiring deadlines.
That takes two things: a stable identifier by which you recognise the vehicle again – the builder’s number – and an archive in which shots of the same vehicle can be brought together. How to build such an archive is described in the article on building a photo archive for spotters. Anyone specifically hunting for striking liveries will find a method in the article on advertising liveries and special paint schemes – the approach transfers well to industrial locomotives.
Markings are read with a telephoto lens
Shunting areas are especially dangerous: vehicles are moved without warning, without a signal and often propelled from behind. Industrial, port and private-siding railways are private property. No data panel justifies getting closer to the track – use your focal length instead of your feet.
Why industrial locomotives get so old
A shunting locomotive built decades ago and still working today is nothing unusual in railway operations. On regional networks such as the Bremen/Lower Saxony railway network, such vehicles are part of everyday life. There are solid reasons for this – and they explain why this group of vehicles is so rewarding for spotters.
Low mileage. A works locomotive often covers only a few kilometres a day, but with many starts and stops. Wear occurs at the coupling, transmission and brakes, not on the running gear from long-distance running. Components that a main-line locomotive would wear out in years last considerably longer here.
Low speeds. Without high speeds, many of the demands on running gear, suspension and safety systems that force retrofits and withdrawals on main-line vehicles simply don’t apply.
Repairability. Mechanically driven types with rod drives can be serviced in an ordinary industrial workshop. There’s little electronics that becomes unobtainable after a few years.
Economics. As long as a locomotive does its job, there’s little incentive to buy new. Replacement usually only happens when deadlines, emissions rules or a rebuild of the site force the issue.
The flip side: when such a vehicle is finally withdrawn, it often happens quietly and quickly. Sometimes only weeks pass between its last run and being scrapped. Some machines only escape this because a society such as the Friesoythe-Cloppenburg heritage railway takes them on. That’s why every documented encounter is valuable, and why it’s worth the effort to note the builder’s number and date carefully.
Anyone who follows a machine over the years ends up with something no official source offers: a documented sequence of keepers, liveries and locations – all held together by the one number that never changes.
Common mix-ups
It points to a four-axle MaK if …
- you count four axles in a line in a rigid frame
- coupling rods run between the axles
- the builder's plate names MaK or Maschinenbau Kiel
- an existing vehicle number begins with 98
Look more closely if …
- the vehicle is freshly painted and relettered
- only a short fleet number is shown
- the vehicle has been re-engined or converted
It isn't a 650 D if …
- the vehicle has bogies
- you count two or three axles
- the vehicle number begins with 92 – that makes it a main-line locomotive
Conclusion
If you take just one thing from this page, make it this: photograph the data panel on every industrial locomotive, and the builder’s plate too if you can reach it. Both together take seconds and make the difference between a nice photo and a piece of evidence. Everything else – livery, company logo, fleet number – is the wrapping that gets swapped out with the next keeper. Get into this habit and, over the years, you build a collection in which every vehicle stays findable, even if it has changed its name three times in the meantime. No official source does that for this group of vehicles.
With the MaK 650 D, appearance doesn’t decide the matter – the markings do. Keeper marking, fleet number and livery describe a state that changes at the next sale; the builder’s number and type remain. Keep the two apart and you can follow a vehicle for decades – and understand why the same machine turns up under three different names in two photo archives.
In short
Four coupled axles, type code 98, changing keepers: you identify the MaK 650 D by its builder's number and data panel. Livery and fleet number are just a snapshot in time.
Follow vehicles across the years
Builder's number, keeper, livery and date in one app – turning individual sightings into a vehicle biography.
Summary
- The data panel is the densest source of information on an industrial locomotive, and easy to capture with a telephoto lens.
- Keeper markings identify a vehicle's operator, but they're tied to the current owner and so are fleeting.
- Four coupled axles in a rigid frame indicate heavy shunting and transfer duty.
- Industrial, port and private-siding railways are private property; observation is only possible from publicly accessible areas.
Frequently asked questions
What does MaK 650 D mean?
The designation comes from Maschinenbau Kiel's type programme. The number gives the engine power in metric horsepower, and the letter D stands for four coupled driving axles in a rigid frame. The type name describes power class and running gear without needing any class-numbering scheme.
What is a keeper marking?
A short letter code that names the operator of a rail vehicle, written on the vehicle together with the country code. It usually sits right next to the vehicle number on the data panel. The code changes as soon as the vehicle changes keeper – it describes a state, not an identity.
What else appears on the data panel?
Depending on the vehicle: tare weight, brake weights, brake type, length over buffers, the date of the last inspection and its deadlines. For spotters it's the most informative panel on the whole vehicle – a single sharp telephoto shot delivers more information than ten general views.
Why isn't livery a reliable identifying feature?
Because industrial locomotives can be repainted at every change of keeper, every major overhaul and every refurbishment. The same machine can carry three different liveries within a few years. What remains are the builder's number, the type, and – while it applies – the twelve-digit vehicle number.
How do I tell a fleet number from a vehicle number?
The fleet number is assigned by the keeper for internal use, often one or two digits and boldly written. The twelve-digit vehicle number comes from the vehicle registration register and begins with 98 for shunting locomotives. Only the latter is unique across the whole network.
Why do shunting locomotives carry type code 98?
The first two digits of the twelve-digit vehicle number denote the vehicle type. 98 stands for diesel shunting and light locomotives, 92 for diesel main-line locomotives. The classification follows intended use and approval, not the size of the vehicle.
How do I photograph a data panel well?
With a long focal length from a safe distance, as close to a right angle to the side of the vehicle as possible, and with light falling from the side. Direct sunlight on glossy paint creates reflections that make embossed or printed lettering unreadable. If the vehicle is standing still, a second shot with different exposure is worthwhile.
Where can you see the MaK 650 D today?
On industrial, port and private-siding railways, at transfer workings and increasingly with heritage groups. Keepers, fleet numbers and locations change constantly through sales, hire and withdrawal. Current sightings are more reliable for this group of vehicles than any older list.
Log your sighting of the MaK 650 D
Date, location and vehicle number logged in seconds – and visible to the community.
Related classes
MaK 650 C
The MaK 650 C is a three-axle shunting locomotive with a rigid frame. Many machines in this group have been retrofitted for radio remote control – and it shows.
ShunterMaK 600 D
The MaK 600 D is a four-axle shunting locomotive in a rigid frame. Its brake equipment explains why shunting service needs its own rules.
ShunterMaK G 1100 BB
The MaK G 1100 BB is a diesel-hydraulic shunting and transfer locomotive from Kiel. The twelve-digit vehicle number is the key to identifying it for certain.
ShunterKrupp 350 PS
Krupp 350 PS is not a class, but a power rating used as a collective name. How to make sense of such designations and where their limits lie is explained here.
ShunterLEW V 100
The LEW V 100 from Hennigsdorf still shapes the operations of many private railways today. Rebuilds and re-engining make identifying it both interesting – and tricky.
ShunterLHB 1100BB
The LHB 1100BB is a four-axle diesel shunting locomotive from Salzgitter. One often-overlooked detail on such locos: the design of their coupling and buffing gear.
Who is behind it
Groups, brands, manufacturers and operators – who owns whom and how to recognise them out in the field.
Bahnen der Stadt Monheim
Bahnen der Stadt Monheim is a municipal transport company in the Rhineland – in railway terms mainly an infrastructure manager. There are hundreds of such small companies in Germany, and they explain why not every track belongs to DB by a long way.
InfrastructureEisenbahnnetzwerk Bremen/Niedersachsen (EBN)
Between the Weser, Elbe and Ems lies a second rail network: regional railway infrastructure that doesn't belong to the federal government. The EBN stands for this layer – track without trains of its own, shaped by seaport hinterland traffic, private sidings and its own set of rules.
Heritage railwayMuseumsbahn Bremerhaven-Bederkesa
Between Bremerhaven and Bad Bederkesa lies a standard-gauge line with no scheduled local service left. What runs there in the summer half-year is heritage traffic – organised by an association whose members handle driving duty, carriage care and track work themselves.
Heritage railwayMuseumseisenbahn Friesoythe-Cloppenburg e.V.
The Museumseisenbahn Friesoythe-Cloppenburg runs on a standard-gauge branch line in the Oldenburger Münsterland that is no museum piece: freight traffic still uses the same route. The heritage service itself runs on individual dates in the summer half-year and is entirely volunteer-run.
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