Global Heavy Equipment Inspections

How to Check the DPF Status of a Used Construction Machine

Before purchasing a used construction machine, it’s critical to check the status of its Diesel Particulate Filter (DPF). This filter plays a key role in meeting modern emissions regulations and avoiding costly repairs. In this newsletter, we explain what a DPF is, why it matters, how to check its condition, and how to spot illegal modifications.

What Is a DPF in a Construction Machine?

A Diesel Particulate Filter (DPF) is a component in the exhaust system that traps and removes soot (particulate matter) from the engine’s exhaust gases. It helps the machine meet emission standards such as Tier 4, Stage IV, and Stage V. A DPF reduces black smoke and harmful particles like PM10 and PM2.5, making the machine cleaner and more environmentally compliant.

Why You Should Check the DPF Before Purchase

Replacing a DPF in a large machine can be extremely expensive. For a mid-size machine like a 20–30 ton excavator, costs range from $5,000 to $10,000. For larger equipment such as a 40+ ton excavator, dozer, or loader, DPF replacement can exceed $25,000. These high costs make it essential to evaluate the DPF before finalizing any purchase.

How to Check the DPF Status

1. Check the Machine’s Display or Diagnostic Menu
   Most modern machines from brands like Caterpillar, Komatsu, Volvo, Hitachi, and John Deere feature onboard monitoring systems. You can access information such as the DPF soot level, regeneration status, and any fault codes by navigating through the operator’s display or service menu.

• Use a Diagnostic Tool
  Use an OEM or compatible diagnostic tool to retrieve detailed DPF data.
• Caterpillar: CAT ET
• Volvo CE: VCADS or Tech Tool
• Komatsu: Diagmaster
• John Deere: Service ADVISOR

These tools help you check soot and ash levels, regen history, differential pressure, and error codes.

3. Inspect Maintenance Records
    Ask for documentation of the DPF’s maintenance history. Look for the date of the last cleaning or replacement, regen frequency, and any past DPF-related errors. Machines that require frequent forced regenerations may have underlying issues.
   
   
4. Conduct a Physical Inspection
    Check for signs of soot buildup around the exhaust. Listen for active regeneration (higher idle RPM or hotter exhaust). Examine whether any emissions components have been removed or tampered with.
   
   
5. Watch for Warning Signs
    Be alert to frequent or failed regenerations, loss of power, poor fuel efficiency, engine warning lights, and error codes such as P2463 or P2002. These signs may indicate a clogged or malfunctioning DPF.

Pro Tip:
Before replacing a DPF, confirm it is actually at the end of its life. In many cases, a forced regeneration or professional cleaning can resolve the issue for far less money.

Cleaning DPF Instead of Replacing

If the DPF is still structurally sound, you can clean it instead of replacing it. Cleaning (ash removal) typically costs between $600 and $1,500 depending on size and method. Most filters can be cleaned multiple times, with service intervals ranging from 2,000 to 4,500 operating hours.

How to Detect an Illegally Removed DPF

1. Visual Inspection
   Look for welding marks or cuts on the DPF casing. Check that all DPF sensors and wiring are present and intact. Missing or damaged sensors may signal tampering.
   Examine the engine control software if possible. Unauthorized software modifications may hide the fact that the DPF has been removed.
   
   
2. Warning Lights and Error Codes
   A DPF warning light may indicate the system isn’t functioning properly. Read the ECU for stored error codes related to the DPF or its sensors. These codes can offer clues about illegal removal or system failures.
   
   
3. Emissions Testing
   Roadside or formal emissions testing can detect high particulate emissions caused by a missing or faulty DPF. Machines without functioning filters are likely to fail.

Is It Illegal to Remove the DPF fom a heavy machine?

Yes. In most regions, removing the DPF from a construction machine violates emissions regulations. Authorities may issue fines, penalties, or impound the machine. Operating a tampered machine also poses a risk for the buyer if discovered during inspections or audits.

Which emission status can a construction machine reach with a DPF exhaust filter system?

A construction machine equipped with a DPF (Diesel Particulate Filter) can typically meet the following emission standards, depending on the full exhaust aftertreatment system it is paired with:

A construction machine with a DPF can meet:

• Stage IIIB or Tier 4i when paired with EGR/DOC
• Tier 4 Final or Stage IV when paired with SCR and DOC
• Stage V (EU) only when DPF is combined with DOC, SCR, and sometimes ASC

Let Mevas Inspect the Machine for You

When Mevas Heavy Equipment Inspectors evaluate a used construction machine, they inspect the exhaust system and check for DPF-related error messages. Our inspectors identify signs of modification or tampering and include these findings in the final report. This inspection offers peace of mind and costs significantly less than replacing a faulty DPF system.

Before you import or purchase a machine, let Mevas help you avoid costly surprises.

This newslettercontent is available for Download here: How to Check the DPF Status of a Used Construction Machine

Tasación, evaluacion y inspeccion de equipos mineros al nível internacional

Aquí puedes ver un vídeo sobre el tema tasación de equipos mineros.

Inspección y evaluación global de maquinaria minera

Aunque numerosas empresas ofrecen servicios de valoración de activos, solo unas pocas están realmente especializadas en la tasación de equipos mineros. Estas empresas especializadas poseen un profundo conocimiento del sector minero, comprenden la dinámica del mercado y están familiarizadas con los matices técnicos de los distintos tipos de maquinaria minera. Sin embargo, solo unas pocas cuentan con la experiencia necesaria y están preparadas para realizar inspecciones in situ en todo el mundo. Mevas es una de esas empresas, que se centra específicamente en las inspecciones y valoraciones para la industria minera.

Consultoras con experiencia en minería

Muchas consultoras generales incluyen servicios relacionados con la minería, como la valoración de equipos, dentro de su amplia cartera. Si bien esta amplitud puede ser útil en situaciones complejas, estas empresas pueden carecer de los conocimientos específicos necesarios para evaluar con precisión la maquinaria pesada de minería. A diferencia de estas empresas, Mevas se posiciona principalmente como una empresa de inspección y no como una consultora general. Hasta la fecha, el equipo de Mevas ha completado con éxito numerosos proyectos de valoración a gran escala. Conocemos muy bien las máquinas de Komatsu y Caterpillar.

Tasadores independientes y expertos técnicos

También hay tasadores independientes con las cualificaciones pertinentes y una amplia experiencia en la industria minera. Estas personas suelen aportar una sólida experiencia técnica. Mevas, por ejemplo, lleva desde 2006 prestando servicios de tasación de equipos mineros. El equipo ha llevado a cabo con éxito numerosos proyectos importantes de inspección y valoración, a menudo relacionados con grandes flotas de máquinas.

Conocimientos especializados para equipos complejos

Aunque muchos tasadores pueden ser competentes en la valoración de excavadoras estándar o de un pequeño número de camiones volquete, los equipos más complejos suelen suponer un reto. Activos como los sistemas de transporte, las trituradoras, las plantas de cribado y la tecnología de procesamiento estacionario exigen un nivel de conocimientos técnicos mucho más elevado. Aquí es donde Mevas destaca. Llame hoy mismo a Mevas para obtener ayuda.

This text is available in english and as a PDF.

Who Can Perform Large-Scale Valuations of Mining Equipment?

You can see a video about valuation of mining machinery here.

Mevas – A Specialist in Mining Equipment Valuation

While numerous firms offer asset valuation services, only a select few are truly specialised in the appraisal of mining equipment. These specialist firms possess deep knowledge of the mining sector, understand market dynamics, and are familiar with the technical nuances of various types of mining machinery. However, only a handful have the necessary expertise and are prepared to conduct on-site inspections worldwide. Mevas is one such firm, focusing specifically on inspections and valuations for the mining industry.

Consultancies with Mining Expertise

Many general consulting firms include mining-related services, including equipment valuation, within their broader portfolio. While this breadth can be helpful in complex scenarios, these firms may lack the specific expertise needed for accurately assessing heavy mining machinery. Unlike such firms, Mevas positions itself primarily as an inspection business rather than a general consultancy. To date, the Mevas team has successfully completed numerous large-scale valuation projects.

Independent Appraisers and Technical Experts

There are also independent appraisers with relevant qualifications and extensive experience in the mining industry. These individuals often bring strong technical expertise to the table. Wolfgang Bühn, for instance, has been working as a mining equipment appraiser since 2006. Together with his team, he has successfully carried out many substantial inspection and valuation projects, often involving large fleets of machines.

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Specialist Knowledge for Complex Equipment

While many appraisers may be competent in valuing standard excavators or a small number of dump trucks, more complex equipment often presents a challenge. Assets such as conveyor systems, crushers, screening plants, and stationary processing technology demand a much higher level of technical understanding. This is where Mevas excels.

The Mevas team regularly inspects and values a wide range of machinery used in open-cast mining and quarrying, including:

• Stationary and mobile crushing plants
• Mining Shovels and Trucks
• Conveyor belt systems
• Gravel washing facilities
• Heavy transport machinery
• Workshop and support facilities
• Light vehicles and remaining inventories

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How Is Depreciation Calculated for Mining Equipment?

Depreciation in Mining Operations
Depreciation represents the decline in value of buildings and equipment over time due to wear and tear. In the mining sector, companies typically use either the prime cost (straight-line) or diminishing value method to calculate depreciation.

• The prime cost method allows for equal deductions each year over the asset’s effective life.
• The diminishing value method applies a fixed percentage to the remaining balance, resulting in higher deductions in the earlier years.

However, depreciation is not solely about accounting. Real-world asset values are also influenced by:

• Total operating hours
• Usage patterns (e.g., single vs triple shift operation)
• Replacement value of an equivalent machine
• Possible selling price of an equivalent machine
• Component replacement history (e.g., engines, transmissions, axles)
• Transport costs for equipment from the seller to the mine
• Repair work required at short notice to keep operations running

Such factors must be carefully considered to accurately determine the residual value of mining machinery.

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What Types of Valuation Are Common in the Mining Industry?

Three principal approaches to valuation are used in the mining sector:

1. Depreciated Value
   This method follows the declining balance formula, calculating depreciation over time for accounting purposes. As machinery ages, the rate of depreciation reduces accordingly.
2. Replacement Value
   This approach estimates the cost of acquiring a comparable machine of similar age and usage. It is especially relevant in transactions involving entire operations or in insurance settlements.
3. Fair Market Value
   This valuation is used as a negotiation basis when transferring ownership of mining concessions. It considers transport costs and logistical implications, especially if the incoming operator must procure new equipment while the outgoing one must decommission and remove theirs.

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For any type of mining equipment valuation, whether underground or above ground, it is important to know the purpose of the valuation. What is the objective and who are the negotiating partners? Please contact us if you have any questions on this topic. We will be happy to advise you and explain which options are best suited to your project.

On-site or On-screen valuation

Depending on your requirements, we will decide together with you whether an on-site inspection of the equipment is necessary or whether an assessment can be made based on the data and images you provide. For purely accounting purposes, an on-screen valuation is often sufficient to calculate the residual values. However, when it comes to complex projects such as the sale of a company or takeover by a new concessionaire, an on-site inspection is usually necessary.

Download the info about mining asset appraisal here as a PDF file.

Exciting news for equipment buyers and industry professionals! Mevas, the trusted name in heavy machinery inspections, will have an expert inspector on-site at the Caorso Auction happening on May 22-23. This is a golden opportunity for buyers to secure reliable insights into the condition of machinery before placing their bids.

Address: Via Canada snc, Caorso, Italy, 29012

Hours Office: Mon-Fri, 08:00 AM – 03:30 PM (closed on public holidays)

Why Attend the Caorso Auction?

The Caorso Auction is one of Europe’s largest gatherings for heavy equipment and machinery sales. Organized by renowned auctioneer Ritchie Bros., it features a massive lineup of excavators, loaders, dumpers, and more. For those looking to expand their fleet or acquire quality used equipment, Caorso is the place to be.

How we can help you

Purchasing heavy equipment at auctions can be a game-changer, but it also comes with risks. That’s where Mevas steps in. With more than 15 years of experience in machinery inspections across Europe, Mevas inspectors provide detailed assessments of construction machinery, cranes, and trucks. Our inspector at Caorso will be available to evaluate key aspects of the equipment including:

• Engine condition and performance
• Hydraulic system functionality
• Structural integrity
• Wear and tear on undercarriage and tires
• Cabin and operator controls

Booking an Inspection

To take advantage of Mevas’ inspection services at the Caorso Auction, early booking is recommended. You can easily schedule an inspection by contacting us directly or visiting our website. Our inspector will be on-site, ready to provide you with a comprehensive report and expert advice.

 
Join Mevas at Euro Auctions Leeds – April 30 to May 4, 2025

One of the UK’s largest heavy equipment events is just around the corner: Euro Auctions in Leeds, taking place from April 30 to May 4 at Roall Lane, Goole, DN14 0NY. With hundreds of machines going under the hammer, it’s a prime opportunity for buyers looking for quality equipment at auction prices.

📍 Location: Euro Auctions, Roall Ln, Leeds, Goole, DN14 0NY
📅 Dates: April 30 – May 4 | ⏰ Hours: Mon–Fri, 8am–5pm

Mevas Will Be On-Site for Inspections – April 30 to May 3

Our experienced inspector will be available on-site from Tuesday, April 30 through Friday, May 3 to assist buyers with independent pre-bid inspections.

Special Offer: Reduced Fees for Multiple Inspections

Need multiple inspections? We offer reduced rates for 4+ quick checks, helping you make confident buying decisions.

Why Choose Mevas?

• Independent, unbiased evaluations
• Over 20 years of experience in heavy equipment inspections
• Fast turnaround and clear reporting
• Trusted by dealers, contractors, and international buyers

Book your inspection today!

All details of the auctions available here: Euroauctions Leeds

Your Guide to Buying Used Material Handlers for Scrap Handling

Purchasing used construction machinery, especially material handlers for scrap handling, can be a smart financial move. However, ensuring you get a machine that’s reliable, efficient, and cost-effective requires careful inspection and consideration. A well-maintained used machine can serve your business for years, while a poor purchase could lead to frequent breakdowns and costly repairs. Here are some key factors to keep in mind when evaluating a used material handler.

Check the Service and Maintenance History

A machine’s service history is one of the most telling indicators of its condition. Well-documented maintenance records show that the previous owner cared for the machine, followed scheduled services, and addressed any issues promptly. Look for records detailing regular oil changes, hydraulic system maintenance, and any major repairs or replacements. A lack of service history could indicate neglect, which may lead to hidden problems down the line.

Assess the Structural Integrity

Material handlers operate in tough environments, often handling heavy and irregular loads. Inspect the structural components carefully—particularly the boom, stick, and undercarriage—for signs of excessive wear, cracks, or welding repairs. Pay special attention to pin and bushing wear, as excessive play in these areas can indicate structural weakness and the need for costly repairs.

Examine the Hydraulic System

The hydraulic system is the heart of a material handler, enabling smooth operation and precise control. Look for leaks in the hoses, cylinders, and pump connections. Check the hydraulic fluid for contamination—milky or discoloured fluid may suggest internal issues, such as water infiltration or metal shavings from component wear. A test run should reveal whether the hydraulics operate smoothly without jerky movements or delays. Experienced inspection companies can run a so-called Oil Sampling with a certified lab to examine the containments for unusual wear in components.

Evaluate the Engine Condition

A well-functioning engine is critical for performance and efficiency. Start the machine and listen for any irregular noises such as knocking, excessive rattling, or hissing sounds. Watch for excessive smoke, which can indicate fuel system problems or worn engine components. Low power output or slow acceleration can be warning signs of deeper issues. Additionally, check for any oil or fuel traces in coolant and for coolant in oil. A too high oil level in engine sump can be a hint for problems.

Inspect the Tires or Tracks

The undercarriage is often one of the most expensive components to repair on heavy machinery. If the machine has tracks, look for wear on the sprockets, rollers, and track links. If it has tires, ensure they have sufficient tread depth and no major damage.

Test the Electrical and Control Systems

Test the electrical system to ensure that all lights, gauges, and switches are working properly. Any flickering displays or non-responsive controls may signal wiring or sensor malfunctions, which can be expensive to diagnose and fix. If a generator is fitted it should be checked for functionality.

Consider the Attachments and Accessories

Many material handlers come with specialized attachments, such as grapples, magnets, or shears. Ensure that any included attachments are compatible with the machine and in good working condition. Hydraulic quick couplers should operate smoothly, and hoses should be free from leaks or excessive damage. It is always recommended to check a material handler with the tool attached.

Run a Test Operation

Whenever possible, operate the machine under real working conditions. Test the boom and stick movements, rotation, and lifting capacity. The controls should be responsive, with no delays or hesitations. Pay attention to unusual vibrations or noises, as these could indicate hidden mechanical issues. Do not forget to check the hydraulic cab raiser and try several full 360° swing operations including the swing brake test.

Final Thoughts

Buying a used material handler for scrap handling can be a cost-effective solution if approached with diligence. A thorough inspection and careful evaluation of the machine’s condition, combined with verifying its service history and legal documentation, can help you make a smart investment. If you’re unsure about any aspect of the inspection, consider working with a professional machinery inspection service such as MEVAS to ensure you get the best value for your money. Consider investing some money in a professional inspection to avoid buying a machine with hidden problems.

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