DPF cleaning and regeneration, AdBlue & SCR repair
Diagnostics, cleaning and regeneration of DPF filters, AdBlue and SCR system repair, and EGR valve service for construction machinery. Mobile, on site where the machine works.
We diagnose, clean, regenerate and repair exhaust aftertreatment on construction, agricultural and industrial machinery: the diesel particulate filter (DPF), the AdBlue/SCR system and the EGR valve. We come to the machine, read the fault codes, check the sensors and choose the right fix. We do not remove or disable these systems.
At a glance
- Scope
- DPF, AdBlue/SCR and EGR diagnostics, service regeneration and DPF cleaning, AdBlue repair (pump, dosing module, NOx sensors, heaters), EGR valve cleaning and replacement.
- Machines
- Excavators, loaders, backhoe loaders, rollers, pavers, tractors and other machines with Stage IIIB, IV and V engines.
- Brands
- Caterpillar, Volvo CE, JCB, Komatsu, Liebherr, Doosan, Hitachi, Takeuchi, Bobcat, Bomag, Hamm, Dynapac, Wirtgen, Vögele and others. We are an independent service, not a brand dealer.
- Response time
- Mon–Fri 7:00–17:00. Standard requests are usually handled within 24–48 business hours; for a breakdown that stops the machine we aim to arrive the same working day; regular customers get 24/7 emergency support. Enquiries in English by form, e-mail or WhatsApp; the phone number is Polish (+48).
- Area
- The whole of Poland, the Czech Republic and Slovakia. We come to the machine; parts that need rebuilding go to our workshop.
- Prices
- We agree the cost before work starts. What the price of diagnostics, labour and travel depends on: pricing and travel principles.
- What we do not do
- We do not remove or disable DPF, AdBlue/SCR or EGR. We repair them so that they work as the manufacturer intended.
Scope of Services
DPF filter regeneration
AdBlue system repair
SCR system diagnostics
Catalytic converter replacement
DPF filter cleaning
EGR system diagnostics and service
Professional machinery service - Why Voltscan?
Voltscan is your reliable partner for professional construction and industrial machinery service. For over 20 years we have specialized in comprehensive diagnostics, repair and maintenance of heavy construction equipment. DPF, AdBlue, SCR and EGR Service is one of our core specialisations. Our mobile service, equipped with modern diagnostic tools, comes directly to your machine's location in Poland, the Czech Republic, Slovakia and beyond, so there is no need for costly and time-consuming transport. We offer a full range of services - from simple repairs to complex regeneration of electronic, hydraulic and electrical systems. We work with all leading brands: Wirtgen, Vögele, Hamm, Bomag, Dynapac, Ammann, John Deere, New Holland, Claas, Fendt, Valtra, Steyr, Doosan, Liebherr, JCB, Volvo, Komatsu, Caterpillar, Takeuchi, Bobcat, Doppstadt, Terex and many others. Every repair is performed with the utmost care by certified specialists with many years of industry experience.
Years of experience
Machines repaired annually
Working hours
Breakdown support for regular customers: 24/7
Report a Fault
Fill out the form and we will contact you
Writing after hours? We'll call you back by 8:00 on the next working day.
DPF: regeneration and cleaning of the particulate filter
The DPF traps soot, which the engine burns off from time to time during regeneration. On a construction machine regeneration often has no chance to finish: long idling, short work cycles and switching the machine off mid-cycle. The symptoms are the DPF warning light, more and more frequent regenerations, loss of power and limp mode.
First we check whether the problem is the filter itself or the differential pressure and exhaust temperature sensors. Then we run a service regeneration with a tester or clean the filter; a filter that is cracked or melted needs replacing.
AdBlue: warning light, faults and power derate
The AdBlue system doses urea solution into the exhaust upstream of the SCR catalyst. When the controller detects a fault – poor fluid quality, a pump or dosing module fault, a failed heater or NOx sensor – it switches on the warning light and after a while limits the machine's power. We diagnose the whole system and repair or replace the faulty part. Use fluid that meets ISO 22241; AdBlue freezes at about −11 °C, so heater faults are common in winter.
SCR: catalyst and NOx sensors
The controller judges SCR efficiency from the NOx sensors before and after the catalyst. A "low SCR efficiency" fault can come from poor AdBlue, a contaminated dosing module, a faulty sensor or the catalyst itself. Measurements and a dosing test tell these causes apart before expensive parts are replaced.
EGR: exhaust gas recirculation valve and cooler
The EGR valve returns part of the exhaust to the intake. A valve clogged with carbon sticks, causing loss of power, smoke and faster DPF clogging. We clean or replace the valve, check its control and the tightness of the EGR cooler.
Machines, not passenger cars
We work on exhaust aftertreatment in construction, agricultural and industrial machinery, where filters, AdBlue tanks and control differ from those in cars. Our DPF cleaning service is for machines, not passenger cars.
Why we do not disable DPF or AdBlue
Removing or switching off DPF, AdBlue/SCR or EGR by software is against the law, causes problems at inspections and handovers and reduces the resale value of the machine. A repaired system lets the machine work at full power legally, so we only diagnose, clean, regenerate and repair.
What do you gain by choosing our service?
Specific benefits for your business
Fast response
For urgent breakdowns we aim to be on site the same working day. We understand that every hour of downtime means financial losses.
Computer diagnostics
We use professional diagnostic tools compatible with systems from all manufacturers. Precise reading of error codes and operating parameters.
Mobile service
You don't need to transport the machine to the workshop. We come with complete equipment directly to your workplace or construction site.
Spare parts
We encourage customers to buy parts themselves - they can use the discounts they get from their own suppliers. We advise on what needs replacing.
Experienced team
Our technicians have certificates and training from machine manufacturers. They constantly improve their qualifications by participating in specialized courses.
Competitive prices
Transparent price list and clear billing terms. Before starting work we present a detailed estimate of repair costs.
Advanced technical capabilities
Professional diagnostic equipment and service tools
Electronics diagnostics
Professional testers and oscilloscopes for analysis of control systems, ECU, sensors and actuators. Programming and calibration of controllers.
Electrical measurements
Multimeters and insulation testers. Diagnostics of electrical installation, alternator, starter, batteries.
Hydraulics
Pressure gauges, flow meters, pressure tester. Diagnostics of pumps, valves, hydraulic cylinders, control systems.
Oil analysis
Testing cleanliness and condition of hydraulic, engine oil. Detection of contamination and wear products.
Temperature measurements
Thermal cameras for detecting component overheating, leaks, cooling problems.
Load tests
Verification of power, torque, pump output after repair under actual load conditions.
We service all leading brands
Wirtgen
Vögele
Hamm
Bomag
Dynapac
Ammann
John Deere
New Holland
Claas
Fendt
Valtra
Steyr
Doosan
Liebherr
JCB
Volvo
Komatsu
Caterpillar
Takeuchi
Bobcat
Doppstadt
Terex
Hitachi
Hyundai
How does the repair process work?
Breakdown report
Phone contact or through form. Describe the problem, the location and the machine type. We get back to you to agree the details.
Initial diagnostics
Based on problem description we prepare for repair: select parts, tools, plan arrival time.
Service arrival
Our mobile team arrives on site with complete diagnostic equipment and most commonly used spare parts.
Detailed diagnostics
We perform computer tests, electrical and hydraulic measurements. Precisely determine the cause of failure.
Repair quote
We present detailed cost calculation: labor, parts, travel. We start work after your approval.
Repair
Replacement of damaged components, calibration, tests. We document all performed activities.
Final tests
We verify repair correctness: load tests, parameter control, error clearing.
Report
We provide detailed service report and photographic documentation of completed work. We give operational recommendations.
Professional service equipment
OBD diagnostic testers
Professional scanners compatible with CAT ET, Volvo VCADS, JCB Service Master, Komatsu KOMTRAX systems
Digital oscilloscopes
Analysis of electrical waveforms, sensor diagnostics, CAN/LIN signal quality testing
Hydraulic pressure testers
Precise pressure gauges and flow meters for measuring pump and valve performance
Thermal cameras
Detection of overheated components, leaks, cooling problems
Multimeters and insulation testers
Voltage, current, resistance measurements, high-voltage installation insulation tests
Specialized tools
Torque wrenches, hydraulic hose crimping equipment, pullers
Fast response time
We work Monday to Friday, 7:00–17:00. Standard requests in Poland, the Czech Republic and Slovakia are usually handled within 24–48 business hours. For breakdowns that stop the machine, we aim to arrive the same working day. Regular customers get 24/7 emergency support, including weekends and public holidays. After you call or send the form, we get back to you to agree the details and the arrival time.
Warranty and service quality
All work is documented with detailed service reports describing work performed, parts used and operational recommendations. We offer service packages for regular customers and technical consulting.
Frequently asked questions
How much does DPF cleaning on a construction machine cost?
It depends on whether a service regeneration is enough or the filter has to be removed and cleaned, on access to the filter on the machine and on travel. We quote before work starts. See our pricing and travel principles.
Is it legal to disable AdBlue on a machine?
No. Removing or disabling AdBlue/SCR, DPF or EGR is against the law. We do not offer it; we repair the system so it works as the manufacturer intended.
Do you clean DPFs on passenger cars?
We specialise in construction, agricultural and industrial machinery. Car aftertreatment systems are different and we do not work on them.
Do you regenerate and clean DPF filters on site?
Yes. We come to the machine, read the fault codes and check the DPF sensors (differential pressure, exhaust temperature). Then we choose the fix: a service regeneration, cleaning the filter or, if the filter is damaged, replacing it. Scope and cost are agreed before work starts.
The machine goes into limp mode because of an AdBlue or SCR fault. What do you do?
We run computer diagnostics on the AdBlue/SCR system: pump and dosing module, NOx sensors, fluid level and quality, heaters and wiring. We repair or replace the faulty part, clear the codes and check the system works, so the machine is back to full power.
Do you service the EGR system?
Yes. We diagnose the EGR system, clean carbon from the valve or replace it, and check its control. A sticking EGR valve often causes power loss, smoke and faster DPF clogging.
When should I call about the DPF?
When the DPF warning light is on, regenerations become more frequent or do not finish, or the machine loses power or goes into limp mode. Early diagnostics improve the chance that a regeneration or cleaning is enough instead of a new filter.
Do you remove or disable DPF, AdBlue or EGR?
No. Removing or disabling DPF, AdBlue/SCR and EGR systems is against the regulations. We only do diagnostics, cleaning, regeneration and repair, so the exhaust aftertreatment works as the manufacturer intended.
Which machines and brands do you work on?
Excavators, loaders, backhoe loaders, rollers, pavers and other diesel machines fitted with DPF, SCR/AdBlue and EGR, including Caterpillar, JCB, Volvo, Komatsu, Liebherr, Bomag, Hamm and Wirtgen.
How quickly can you arrive in case of breakdown?
We are available Monday-Friday 7:00-17:00. For standard breakdowns - 24-48 business hours. For urgent breakdowns causing machine downtime we offer express service - same business day arrival.
Is the service mobile?
Yes, we have fully equipped mobile service teams. We come directly to the construction site or machine location with complete diagnostic equipment.
What machine brands do you service?
We service all leading brands: Wirtgen, Vögele, Hamm, Bomag, Dynapac, Ammann, John Deere, New Holland, Claas, Fendt, Valtra, Steyr, Doosan, Liebherr, JCB, Volvo, Komatsu, Caterpillar, Takeuchi, Bobcat, Doppstadt, Terex and many others.
Do you use original spare parts?
We encourage customers to purchase required parts themselves - this way they can build their own discount packages with their suppliers and maximize benefits from regular purchases. We focus on professional diagnostics and repairs.
How does the repair process work?
Report → Initial diagnostics → Service arrival → On-site diagnostics → Quote → Repair → Tests.
Can I schedule a preventive inspection?
Yes, we offer comprehensive preventive inspections according to manufacturer recommendations. For companies with larger machinery fleets we prepare dedicated service packages.
What is the cost of service travel?
We calculate travel cost individually depending on location. We will provide the exact amount before the visit.
Do you work on weekends?
We normally work Monday-Friday 7:00-17:00. For regular customers in case of breakdowns we provide emergency support 24/7, including weekends and holidays.
How can I get a repair quote?
You can get a quote after initial diagnostics by phone or after detailed on-site diagnostics. We always present transparent calculation before starting work.
What it costs and how we charge for travel
Every repair is quoted before work starts: diagnostics, labour, parts and travel separately. Details: Pricing and quoting principles
DPF cleaning and AdBlue repair: where we travel
We work across Poland, the Czech Republic and Slovakia. Below are the countries and regions we cover; we travel to any location there on the same terms.
DPF, AdBlue and EGR – good to know
A DPF clogs faster when the machine idles for long periods or works in short cycles: the exhaust never gets hot enough for passive regeneration.
An interrupted DPF regeneration, for example switching the machine off mid-cycle, is a common cause of a blocked filter and limp mode.
Contaminated or diluted AdBlue can damage the SCR pump and dosing module. Use fluid that meets ISO 22241.
A faulty EGR valve increases soot in the exhaust, so the DPF clogs faster.
Differential pressure and exhaust temperature sensors control DPF regeneration. A sensor fault can trigger errors even when the filter itself is fine.
Need help with your construction machinery?
Contact us today - we work Mon-Fri 7:00-17:00, with 24/7 breakdown support for regular customers
+48 504 536 966