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OEM Price: USD 39,414

USD 18,163

Save: $21,251

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Direct Fit Replacement DPF + DOC for KOMATSU

OEM Price: USD 39,414

USD 18,163

Save: $21,251

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Brand new! No core charge
OEM direct fit
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Need to Replace Your C6527-01-0010 Combined Komatsu DOC and DPF?

You’re in the middle of a job and your Komatsu dozer flags up a fault code involving your combined DPF and DOC (C6527-01-0010). Your mechanic says you need to replace the part, but you know that OEM replacements can mean steep price tags and long wait times. Then your dealer mentions Roadwarrior—North America’s largest aftermarket manufacturer specializing in emissions control. With over 1,000 replacement parts on offer, and 13 warehouses across North America, you decide to try Roadwarrior! You’re in luck—our D2048-FL is an exact-fit replacement for your Komatsu DOC and DPF system, offering OEM-equivalent performance. You place an order, and we ship your new part to your jobsite within a couple of days. Just like that you’re back on track, with hardly a disruption in your schedule and barely a dent in your budget!




Image of a construction site with Komatsu machinery. The purpose of this image is to highlight that Roadwarrior's D2048-FL is an exact-fit replacement for Komatsu's C6527-01-0010 combined DOC and DPF.Why is Roadwarrior’s D2048-FL a Good Choice?

For one, because our aftermarket catalogue is the largest in the HD aftertreatment industry, with over 1,000 DPF, DOC and SCR models on offer, alongside EGR coolers, NOx sensors, DEF dosers and more! We’re also the only aftermarket company to make DPFs for construction machinery, like your Komatsu dozer or excavator. For customer convenience, we store construction parts like D2048-FL in our Pennsylvania warehouse.


On top of this, Roadwarrior engineers batch-test D2048-FL parts to ensure they’re compatible with your Komatsu engine. Our tests also confirm that our parts achieve optimal temperature, backpressure, and regen performance levels. This is possible because of the Metalcor catalyst technology that our parent company DCL International developed. By enabling passive regens at much lower temperatures, Metalcor reduces active regens and cuts fuel spending! The Metalcor technology in our DOCs reinforces this effect and helps prevent DPF clogging. In a combined DOC and DPF like D2048-FL, Metalcor optimizes emissions reduction and energy efficiency!




What is a C6527-01-0010 Komatsu Combined DOC and DPF?

Many modern construction machines include a DOC (diesel oxidation catalyst) and DPF (diesel particulate filter) to filter toxic emissions. Komatsu’s C6527-01-0010 and its Roadwarrior equivalent D2048-FL are a combination of the two parts. The DOC comes first, oxidizing hydrocarbons, carbon monoxide, and unburned fuel and oil in the exhaust stream. The exhaust then passes through the DPF, which removes up to 98% of particulate matter and soot. Some construction equipment also includes EGR (exhaust gas recirculation) and SCR (selective catalytic reduction) to filter out other harmful elements like NOx particles.



What Kind of Construction Equipment Requires Tier 4 Emissions Control?

Komatsu construction equipment requires a lot of power, and this usually comes from diesel engines! According to the Diesel Technology Forum, construction equipment like your Komatsu forklift actually accounts for 55% of off-road fuel use in the U.S. However, this large-scale diesel use produces a lot of exhaust gas! To reduce the environmental fallout, the EPA introduced compulsory Tier 4 standards for new off-highway heavy equipment sold from 2014. The result is that machinery manufacturers have to include emissions control parts like C6527-01-0010 in construction equipment with engines above a certain size. This drives improvements in fuel efficiency and reduces toxic emissions on jobsites! Since the EU introduced Stage V regulations in 2018, there’s also been talk of Tier 5 emissions control in the U.S.A. Any new EPA regulations would likely extend aftertreatment regulations to a wider range of off-road machinery.




Image of a Komatsu excavator pouring debris into a mechanical haul truck. Image highlights the fact that Roadwarrior emissions part D2048-FL is an exact-fit replacement for Komatsu DOC and DPF combination C6527-01-0010.An Ashy Problem for Your Komatsu C6527-01-0010

Many things can damage a DPF, including pressure and restricted exhaust flow from a clogged DOC. However, the most common cause of DPF failure in Komatsu construction equipment is ash build-up. Regens clean the DPF by burning away the built-up soot with hot exhaust, but they leave behind a small ash residue. The ash accumulates over time, blocking the DPF and causing pressure to build up. To prevent this becoming an issue, we recommend a professional DPF clean after around 3,000–4,000 hours of runtime. Combined with regular regens, this can significantly extend the life of your Komatsu DPF and engine. You should also replace your combined DPF and DOC (C6527-01-0010) when it fails! Replacing a faulty DPF with a reliable equivalent like D2048-FL will prevent it cracking under pressure and risking an engine derate.


DPF blockages are exacerbated by changes to the air-fuel balance in the exhaust. This is often caused by dirty air filters limiting clean airflow into the engine’s combustion chamber, or faulty fuel injectors letting the engine burn over-rich fuel. A similar problem is caused by air leaks in the intake or exhaust. These imbalances cause the engine to generate more soot and for ash to collect even faster on the DPF!




Trouble with Leaks: Protecting Your Combined DOC and DPF (C6527-01-0010)

Komatsu DOC and DPF combinations like C6527-01-0010 can be damaged by oil or coolant leaking into the exhaust and emissions system! Coolant usually protects the engine by moving heat and adsorbing extreme temperatures. However, if a coolant tank leaks and coolant escapes into the exhaust, it can reach the DOC and DPF, causing highly damaging hydrocarbon poisoning! At this point you’ll need to replace your DOC+DPF combo with a new part like Roadwarrior’s D2048-FL.



Why Do Distributors Work with Roadwarrior?

We’re the only aftermarket manufacturer to make DOCs and DPFs for construction machinery! But that’s not the only reason why over 2,000 distributors across the U.S.A. and Canada stock Roadwarrior devices! D2048-FL and our other construction devices are just one part of North America’s largest aftermarket catalogue of HD aftertreatment parts. We also offer DPF, DOC, SCR and EGR devices, NOx sensors, DEF dosers, lithium APU batteries and more for semitrucks and buses. Our parts are exact-fit equivalents to major OEMs like Cummins, Detroit Diesel, Navistar, and Volvo. With so many options, Roadwarrior is ready to meet your customers’ needs in both on-road and off-road applications!


Stocking Roadwarrior parts lets you offer lower rates, quicker delivery timelines and a hassle-free warranty to protect your customers’ investment. Meanwhile, our distributors enjoy bulk order rates and stock discounts. We also offer free product training on new parts, and webinars with our system experts!



Scan The Problems Out of Your Komatsu Aftertreatment

Having trouble with your C6527-01-0010 Komatsu DPF and DOC? Why not consider a Diesel Decoder! This pocket-sized diagnostic scanner reads construction-specific DTCs, checks whether you need repairs and offers access to the Diesel Laptops® repair library. It also scans for the full range of OEM and generic fault codes in on-road HD equipment like semitrucks. When used with your semitruck, Roadwarrior’s Diesel Decoder can also:

  • Reset your DPF ash accumulator.
  • Read total vehicle data and store comprehensive truck specs, including VIN Information.
  • Detect vital trip distance, engine operating hours and more to help you schedule maintenance intervals.
  • Generate trip reports including driver productivity summaries that you can review, print, and share.
  • Scan instant and average fuel economy levels, hard braking events and much more.




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Better Coating, Better Performance.

Roadwarrior is the only manufacturer to use Metalcor® catalyst technology across its entire range of Diesel Oxidation Catalysts (DOCs) and Selective Catalytic Reduction catalysts (SCRs). Metalcor® catalysts feature high activity catalyst coatings fused to thinner, stronger, catalyst substrates to guarantee maximum performance under the harshest conditions.

Metalcor® catalyst coatings are designed and produced in our own labs. We then inspect each unit to ensure you get more fuel efficiency, lower consumption of DEF, and long term performance from your heavy duty engine!


Roadwarrior Has You Covered!

All Roadwarrior emissions parts carry a full value 12 month warranty.

LightningVolt lithium batteries carry a full value 30 month warranty.

To make the process hassle-free, our parts have a metal nameplate with the serial number, so even after 500,000 miles of service, it’s still easy to identify. This avoids the common problem of serial numbers printed on stickers that burn off after the first start-up, making them impossible to return. Our failsafe system allows us to work in your interests, honouring claims for on-road and off-road replacements, and giving you peace of mind.

And since Roadwarrior parts are designed to meet or exceed OEM specifications, you can rest easy knowing our direct fit parts will take the problems out of your aftertreatment without interfering with your OEM warranty.

Next Day Is Nice, Same Day is Better!​

A faulty emissions control system can cost you thousands in wasted man-hours as your heavy equipment sits in the shop awaiting a new part. Whether it’s a truck behind on orders, a bus that can’t take passengers, or heavy machinery delaying construction deadlines, Roadwarrior can get you moving again! 

Roadwarrior has twelve warehouses across the U.S.A. and Canada, which can deliver the most popular aftertreatment parts in 1-2 days. With over 1,000 DPFs, DOCs and SCRs on offer, Roadwarrior offers the largest aftertreatment catalogue.

*LightningVolt lithium batteries ship directly from Roadwarrior in Ontario, to ALL 50 states, including Alaska and Hawaii within 2-4 days.