Key takeaways
- The RM 95-800 W is not a locomotive, but a ballast cleaning machine – a self-propelled departmental vehicle for track work.
- Core task: dig contaminated ballast out of the trackbed, screen it and reinstall the usable portion straight away.
- Quickest way to identify it: an extremely long body, externally mounted conveyor belts, a screening unit in the middle.
- At Plasser & Theurer, RM stands for Reinigungsmaschine (cleaning machine); the combination of numbers is a manufacturer's type designation, not a DB class.
- Sightings are tied to a place and short-lived: the machine is wherever work is going on – and somewhere else afterwards.
Contents
Fact file
| Vehicle type | Ballast cleaning machine (track maintenance machine, departmental vehicle) |
|---|---|
| Manufacturer | Plasser & Theurer |
| Task | Dig out the ballast under the track, screen it and reinstall it cleaned |
| Defining assemblies | Excavating chain, screening unit, return conveyor, transfer conveyors |
| UIC type code | 99 (departmental vehicle), country code 80 for Germany |
| Designation logic | Manufacturer's type, not a class in the sense of the DB numbering scheme |
Identifying features
Is this really the class in front of you?
- Very long, box-shaped body with externally mounted conveyor belts
- Large screening unit in the middle section, often with dust-protection cladding
- Works in the engineering-works area with the track lifted above the machine
- Vehicle number begins with 99 80 – departmental vehicle in Germany
- Usually part of a consist with ballast wagons or material conveyor and hopper units
- Yellow or orange warning livery instead of traffic red
Updated: August 2026 – A yellow vehicle that looks like a factory on wheels, with conveyor belts along its side and a track that seems to run right through the middle of it: that’s a ballast cleaning machine of the RM 95-800 W type. This page explains what it does, how to tell it apart from other track machines, and how to observe it without putting yourself or others at risk.
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What is the RM 95-800 W?
The RM 95-800 W is a ballast cleaning machine from the Austrian track machine manufacturer Plasser & Theurer. Its task is narrowly defined: it pulls the contaminated ballast out from under the track, separates it into reusable material and fines, and reinstalls the usable part straight away – without the rails and sleepers having to be removed for the job.
That puts it in the group of departmental vehicles. In the twelve-digit European vehicle numbering system, these vehicles carry the type code 99 in first place, followed by the country code – 80 in Germany. That’s the crucial difference from a locomotive: an electric locomotive begins with 91, a multiple unit with 94 or 95, and a departmental vehicle with 99. How this number is structured in detail is explained in the guide to the UIC number and its check digit. Work like this is commissioned by the infrastructure manager – in Germany, DB InfraGO.
What the type designation tells you – and what it doesn’t
At Plasser & Theurer, “RM” stands for Reinigungsmaschine (cleaning machine). The combination of numbers and letters that follows is a manufacturer’s type designation that identifies the machine’s layout – it is not a class in the sense of the German numbering scheme. That’s why the familiar logic, where “218” or “101” immediately tells you the vehicle family, doesn’t work here.
Anyone who wants to classify departmental vehicles systematically therefore works on two tracks: the type name tells you what the machine can do. The vehicle number tells you which individual machine is in front of you. Both belong in a clean sighting. The basic approach to identifying rail vehicles is described in the guide to identifying rolling-stock classes.
Why ballast cleaning is needed at all
The ballast under a track isn’t decoration but a component with a clear job: it distributes the wheel loads into the ground, holds the track in position and lets water drain away. For that to work, the individual stones have to stay angular and leave gaps between them.
That’s exactly what gets lost over time. With every train passing over, the stones rub against each other, break at the edges and produce fines. On top of that come dust, sand, worn-off material from operations and plant debris. The result is a ballast bed that clogs up: water stands instead of draining away, elasticity decreases, and the track geometry deteriorates faster than a tamping machine can maintain it. That’s when a cleaning machine moves in, operated by track construction companies such as SPITZKE SE during a specially arranged possession.
At this point there are two options. Either the ballast bed is removed completely and relaid – laborious, expensive and tied to a long closure. Or it’s cleaned in a continuous pass: that’s exactly what a machine like the RM 95-800 W does. It pulls out the existing material, screens off the usable portion and reinstalls it straight away. Only the fines leave the worksite, topped up with as much new ballast as is needed to make up the difference.
For observers, that also explains the typical picture at such a worksite: in front of the machine lies an ordinary track, behind it a fresh-looking ballast bed – and alongside stand wagons that take the spoil and supply new material. So the machine never travels alone but is always part of a consist.
How to recognise a ballast cleaning machine
Look at the length
Ballast cleaning machines are strikingly long, because excavation, screening and return have to happen one after the other. A short, compact machine is something else.
Look for conveyor belts
Externally mounted conveyor systems, often slewable, are the surest feature. They carry excavated material to the screening unit and spoil to the attached wagons.
Identify the screening unit
In the middle section sits a large, usually clad box with screening decks. It's the heart of the machine – this is where it's decided which ballast goes back into the track.
Read the surroundings
If the machine is standing together with ballast wagons, material conveyor and hopper units or a tamping machine, you're at a ballast renewal site.
A memory aid for the first glance
Ask yourself: does the vehicle process material, or does it just transport it? Ballast cleaning machines process – belts, screens and hoppers are the outward proof of that.
Where the machine fits in the works sequence
Track construction follows a fixed sequence. If you know that sequence, you can often predict at a worksite which vehicle is coming next.
| Work step | What happens | Typical machine type |
|---|---|---|
| Preparation | Loosen fastenings, deliver material, set up the worksite | Track motor vehicles, crane vehicles |
| Ballast cleaning | Dig out ballast, screen it, reinstall the usable portion | Ballast cleaning machine such as the RM 95-800 W |
| Material logistics | Haul away spoil, bring in new ballast | Material conveyor and hopper units, ballast wagons |
| Tamping and lining | Establish track level and line, compact the ballast | Tamping machine |
| Finishing | Form the ballast profile, sweep and align the track | Ballast regulator |
| Acceptance | Measure and approve the track geometry | Track recording vehicle |
The actual fine work is then done by a tamping machine such as the Plasser & Theurer 09-4X Dynamic, while an SSP 110 SW ballast regulator brings the ballast profile into shape. You’ll also find an overview of machines from the same family under the RM 95-800 W / RM 80-UHR.
Works trains are snapshots
What's standing in the station today is 200 kilometres further on tomorrow. Record your sighting while it's still fresh in your mind.
Observing and photographing – from outside only
Departmental vehicles are rewarding subjects: lots of structure, strong colours, unusual shapes. The catch is the location. They work where nobody belongs.
Engineering works on the track are off-limits
Tracks, works-train lines, storage areas and cordoned-off zones are not a photo spot. Machines and vehicles start moving there without warning, often unannounced and outside the normal timetable. Photograph exclusively from publicly accessible areas such as platforms, bridges or paths. What's permissible in an individual case depends on local conditions – when in doubt, keep your distance.
In practice that means: the best shots come when the machine is stabled at a station between two jobs and you can work from the platform. The rules for that are summarised in the article on the safety distance at the track. Photographically, a medium focal length pays off: the machine is long, and a full view quickly looks arbitrary. Details – screening box, belt drive, number panel – tell you more.
Common mix-ups
It points to a ballast cleaning machine if …
- there are externally mounted conveyor belts
- a large screening box sits in the middle section
- ballast wagons or hopper wagons are standing in the same consist
- the vehicle number begins with 99
Take a closer look if …
- the machine is folded up and stabled – then the belts are barely visible
- a works train consists of several machines with different tasks
- the lettering names a construction company rather than a railway company
It's not a ballast cleaning machine if …
- you see tamping units that extend sideways above the sleepers – that's a tamping machine
- a slewing crane sits on the vehicle – then you're looking at a crane vehicle
- the vehicle only has a load bed and a small crane – that's a track motor vehicle
Conclusion
The RM 95-800 W is a vehicle you don’t learn by a class number but by its function. Once you understand that ballast is dug out, screened and reinstalled here, you’ll instantly recognise the machine by its belts, screening box and length – regardless of keeper and livery. Those are precisely the two features that change more often in track construction than anywhere else.
In short
Long, yellow, with conveyor belts and a screening box: that's a ballast cleaning machine. The type name tells you what it can do, the twelve-digit number tells you which one it is. Observe exclusively from outside the track area.
Departmental vehicles are the rare finds
Document works trains and you'll build a collection hardly anyone else has – Traintrack helps you keep it sorted.
Summary
- Ballast cleaning machines such as the RM 95-800 W renew the ballast bed without the track having to be removed completely.
- You recognise it by its length, conveyor belts and screening unit – not by a class number.
- Keeper, livery and place of use change with contracts and works programmes; the only reliable thing is your own dated sighting.
- Engineering works on the track are not a photo spot – you observe exclusively from publicly accessible areas.
Frequently asked questions
What does a ballast cleaning machine like the RM 95-800 W do?
It renews the ballast bed under the track. A continuous excavating chain works its way underneath the sleepers and carries the old ballast upwards. In the screening unit it's separated into usable material and fines. The clean ballast goes straight back into the trackbed via a return conveyor, while the rest is taken away.
Is the RM 95-800 W a Deutsche Bahn class?
No. The designation comes from the manufacturer Plasser & Theurer and describes a machine type, not a DB class. Departmental vehicles instead carry a twelve-digit vehicle number that begins with the type code 99. Only that number uniquely identifies the individual machine.
How do I recognise the machine in the field?
By three things: it's strikingly long, it carries externally mounted conveyor belts, and a large, often clad screening box sits in the middle section. On top of that there's the warning livery in yellow or orange. A locomotive looks different – here machinery dominates, not a cab with a pantograph.
Does the RM 95-800 W move under its own power?
Ballast cleaning machines of this size are self-propelled on-track machines and move within the work area under their own power. For longer transfers between two worksites, such machines are also conveyed as part of a train, depending on their approval and the operating situation. How that's handled in each case is decided by the works schedule.
Why does the machine often work at night?
Because track closures get in the way of the least traffic then. Ballast cleaning needs a continuous possession, and on the busy network that's usually at night or at the weekend. For observers that means: during the day the machine is often standing still – visible, but not working.
Where am I allowed to photograph a machine like this?
Only from publicly accessible areas – from the platform, from a bridge, from a path next to the line. The worksite itself, the track area and cordoned-off storage areas are off-limits. Vehicles and machines move there without warning, and barriers are not up for negotiation.
What's the difference from a tamping machine?
The tamping machine aligns the track in level and line and compacts the ballast under the sleepers. The ballast cleaning machine, by contrast, replaces the ballast material itself. Both often work one after the other on the same worksite: clean first, then tamp and establish the final track geometry.
Can I recognise a specific machine again?
Yes, by the vehicle number and the keeper code on the side wall. Because keeper, livery and lettering change more often in track construction than with main-line locomotives, it pays to record every sighting with date, place and a picture of the number – otherwise it's no longer possible to match it up later.
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Related classes
Plasser & Theurer RM 95-800 W / RM 80-UHR
Ballast cleaning means: dig out the ballast, screen it, put clean ballast back. Here's how the machines of the RM family work and how to recognise them in a work train formation.
DepartmentalPlasser & Theurer 09-4X Dynamic
Tamping and stabilising in one pass: the 09-4X Dynamic works continuously using the satellite principle. Here's how to recognise the machine on the track.
DepartmentalPlasser & Theurer SSP 110 SW
The ballast plough puts the bed into shape: spreading, profiling, sweeping sleepers clear. Here's how the SSP 110 SW works and how to recognise it in the track.
DepartmentalDB Class 733
Class 733 belongs to the engineering vehicles in the 7xx range. This page shows how to identify such vehicles reliably even without a spec sheet.
DepartmentalDB Class Klv 51
The Klv 51 is a heavy trolley of the Deutsche Bundesbahn – a small work vehicle of the permanent way gangs with its own operational history.
DepartmentalHarsco RGH 20
The Harsco RGH 20 grinds the rail running surface back into shape. Here's how to recognise the grinding train, how it works, and how to stay safe while watching.
Who is behind it
Groups, brands, manufacturers and operators – who owns whom and how to recognise them out in the field.
SPITZKE SE
SPITZKE builds track, overhead lines and stations – mostly when no train is running. For spotters that's a world of its own: yellow machines instead of locomotives, possessions instead of a timetable, and a fleet that appears in no passenger-class list.
InfrastructureDB InfraGO
DB InfraGO has been Deutsche Bahn's infrastructure company since 2024: network and stations under one roof, oriented towards the public good. It doesn't run any trains – but it decides where you're allowed to stand and which line is currently closed.
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