Plant DPF cleaning Leominster is a workshop service from Oldfields Garage in Leominster, Herefordshire. If your excavator, telehandler, tractor, dumper or generator is showing DPF faults, we clean and pressure test the removed filter so you can refit it and get back to work.
Important: this is off-machine cleaning and testing only. In other words, you (or your engineer) must remove the DPF and refit it. However, you can drop the removed DPF into our Leominster workshop, or you can send it to us by courier from anywhere in the UK.
DPF cleaning Leominster for plant and agricultural machinery
Modern diesel machinery works hard, so the emissions system works hard too. Unfortunately, plant kit often idles for long periods, runs at low speed, or does short stop-start jobs. Because of that, regeneration can struggle to complete.
As a result, soot builds up faster, ash accumulates over time, and the DPF becomes restricted. Then you see warning lights, power loss, or derate issues. That’s why a proper clean and a verified result matters.
What a DPF does and why it blocks
A DPF (Diesel Particulate Filter) sits in the exhaust and traps soot. During regeneration, the machine burns off soot to keep exhaust flow healthy. Even so, ash still remains, so every DPF eventually needs a deep clean to remove that build-up.
When restriction rises, exhaust back pressure increases. Therefore, the engine can lose power, run hotter, and use more fuel than it should.
Signs your plant DPF needs cleaning
If you spot any of these symptoms, it’s worth acting early. That way, you usually avoid extra downtime and bigger bills:
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Loss of power, sluggish response or limp mode
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DPF or engine warning light
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Frequent regen requests or failed regens
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Higher fuel consumption than normal
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Poor response under load
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Fault codes relating to DPF pressure or temperature
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Excess smoke in some cases
We’re based in Leominster, and we regularly help customers across Herefordshire and the borders, including Hereford, Ludlow, Kington and Bromyard.
Why clean the DPF instead of replacing it straight away?
Replacement can be expensive. Cleaning often makes sense first, provided the filter is physically sound.
A professional clean can help you:
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Restore exhaust flow and performance
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Improve fuel economy
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Support successful regeneration after refitting
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Reduce the risk of knock-on issues linked to high back pressure
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Keep machines working reliably on site
Importantly, we’ll be straight with you. If cleaning won’t give a reliable outcome, we’ll say so.
Plant DPF cleaning Leominster: how our service works
Once you remove the DPF and get it to us, we follow a clear process. First we check the filter, then we clean it properly, and finally we verify the result.
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Inspection and identification
We confirm the filter type and condition. Then we check for damage. -
Professional DPF cleaning
We use specialist equipment suited to heavy-duty filters. As a result, we remove soot and ash safely and thoroughly. -
Drying and pressure test verification
We dry the filter correctly and then pressure test it. Therefore, you know where you stand before you refit it. -
Practical advice to prevent repeat blockages
If a DPF keeps blocking, an underlying cause is often at play. For example, excessive idling, unsuitable duty cycle, sensor faults, EGR problems or injector issues can all contribute. So, we’ll talk you through likely causes and sensible next steps.
If you suspect the DPF is a symptom rather than the root cause, take a look at our Diagnostic Assessment service and our DPF Doctor Assessment page.
What you need to provide
To keep things quick and simple, please include:
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The removed DPF (drop-off or courier)
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Machine make and model (and year if known)
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Any fault codes or messages (if available)
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A quick note on usage (for example lots of idling, short runs, heavy load work)
If you can, send a photo of the DPF and any part numbers. That helps us advise before it arrives.
When cleaning is suitable vs when replacement is needed
We keep this straightforward.
Cleaning usually suits when:
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The DPF is blocked with soot and ash
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The casing and core are intact
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There are no signs of meltdown or severe internal damage
Repair or replacement may be needed when:
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The core is cracked, melted, or breaking up
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The canister is damaged
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The DPF has been modified incorrectly
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There is heavy oil or coolant contamination
If we find damage, we’ll explain the options clearly. Then you can choose the sensible route.
DPF cleaning for plant machinery in Leominster and Herefordshire
We commonly see DPFs from:
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Tractors and agricultural machinery
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Telehandlers
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Excavators and diggers
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Dumpers and site equipment
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Forklifts and yard machinery
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Diesel generators and other plant
If you’re not sure whether your filter is suitable for cleaning, get in touch. We’ll advise honestly.
Turnaround time
We turn many cleans around quickly, often by the next working day, depending on workload and filter condition. If your machine is down, tell us early. That way, we can help you minimise downtime.
UK-wide mail-in DPF cleaning
If you’re not near Leominster, you can still use our service.
Here’s how it works:
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Email us first so we can confirm the details
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Package the removed DPF securely and send it in
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We clean, dry and pressure test it
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We return it ready for you to reassemble
Email DPFCleaning@oldfieldsgarage.co.uk to book.
Book plant and machinery DPF cleaning in Leominster
If your machine is losing power or throwing DPF faults, let’s sort the filter properly.
Call: 01568 612436
Email: DPFCleaning@oldfieldsgarage.co.uk
Drop off: Oldfields Garage Services Ltd, Unit C1-C2, Brunel Road, Leominster Enterprise Park, Leominster, HR6 0LX
Hours: Monday to Friday, 8:30am to 5:00pm
Drop in the removed DPF, or contact us to arrange the UK-wide mail-in service.