DEF Delete – Disable the DEF System & Keep Your Machine Running

Innovative DEF Delete Solutions for Construction Equipment Worldwide

DEF delete emulator installed on an excavator – prevent limp mode & improve efficiency

DEF system bypass device for construction machinery – eliminate downtime & repairs

AdBlue DEF delete module for heavy equipment – fast installation & reliable performance

DEF Delete on site with Excavators in the background

Heavy-duty excavator with DEF delete installed – works in extreme conditions

Worldwide shipping of DEF delete solutions – fast delivery to USA, Canada & Europe

DEF Delete for Construction Equipment

Bypass the DEF System, Prevent Downtime, and Keep Your Machines Running

🧰 The Best DEF Delete Solution for Construction Machinery

Modern construction machines rely on Diesel Exhaust Fluid (DEF) systems to reduce emissions. But these systems often cause:

  • ⚠️ Limp mode
  • 💰 Expensive repair bills
  • ⏱ Costly downtime

Our DEF Delete Emulator Kits offer a safe, reversible solution to bypass the DEF system, keep your machines running, and prevent project delays.

💡 What Is a DEF Delete?

A DEF delete disables the Selective Catalytic Reduction (SCR) and Diesel Exhaust Fluid (DEF) system in your machine, either by:

✅ Installing a plug-and-play emulator module, or
✅ Performing custom ECU software tuning

This modification stops DEF injection, prevents NOx fault codes, disables limp mode triggers, and allows your machine to operate without DEF-related issues — without damaging the engine or affecting its performance.

🔗 Learn how DEF removal emulators work

⚠️ What It Doesn’t Do – DPF & EGR Systems

It’s important to note:

🚫 A DEF delete does not remove or interfere with:

  • The DPF (Diesel Particulate Filter) – which captures soot from the exhaust
  • The EGR (Exhaust Gas Recirculation) system – which recycles exhaust gases to reduce NOx

✅ Our DEF delete emulators are fully compatible with machines that still have DPF and EGR systems installed.
There’s no need to remove or modify these components — and no error codes will be triggered if they remain in place.

✔ You can safely disable DEF while keeping your DPF and EGR systems intact
✔ Great for machines in non-road or export applications where DEF faults are the primary issue

✅ Benefits of Disabling the DEF System

1️⃣ Eliminate DEF-Related Downtime

  • No more limp mode
  • Bypass AdBlue/DEF errors instantly
  • Operate without SCR system interference

2️⃣ Save Money on Repairs

  • Avoid pump, injector & sensor replacement
  • Stop wasting DEF fluid on failing systems
  • Get back to work while parts are on order

3️⃣ Improve Machine Performance

  • Prevent derating from false sensor data
  • Optimize fuel consumption
  • Remove cold-weather DEF crystallization issues

4️⃣ Run in Remote Locations

  • Operate with no DEF supply chain
  • Ideal for mining, forestry, off-road & export
  • Eliminate reliance on DEF refills

5️⃣ A DEF Delete Keeps Machines Running While Awaiting Repairs

  • Temporary fix that prevents downtime
  • Restore full power immediately
  • Avoid lost revenue during backordered repairs

🔧 How DEF Delete Emulators Work

Our plug-and-play emulators connect directly to your machine’s wiring harness. They simulate a working DEF system and override:

✅ DEF pump & injector errors
✅ NOx sensor faults
✅ Low DEF level warnings
✅ Limp mode triggers

🔗 Explore DEF system faults and how to fix them

🔍 Learn More About DEF & Emissions Systems

For those who want to better understand how DEF systems work — and why faults are so common — here are some trusted external resources:

🌐 What is SCR? – Learn how Selective Catalytic Reduction systems operate from the Engine Technology Forum

✅ AdBlue / DEF Quality Standards – Understand why poor-quality DEF fluid causes faults via Azure

🛠️ Compatible Brands and Engine Families – Explore emissions technologies used in CASE, New Holland, and FPT engines via CNH Industrial

🧪 Deep Dive into DEF Technology – See a non-commercial explanation of SCR and DEF systems from the Diesel Technology Forum

⚙️ Compatible Machine Brands – DEF Delete Emulator Kits Available For

We supply plug-and-play DEF delete solutions for a wide range of construction, agricultural, and heavy equipment brands, including:

  • Hyundai – HL & HX Wheel Loaders / Excavators
  • Doosan – DX Series Excavators, DL Series Loaders
  • CAT (Caterpillar) – Tier 4 Final models with Perkins 4.4 Engines
  • Scania – DC9, DC13, and DC16 Engines (used in off-road and industrial equipment)
  • Perkins – 1204F Engines found in various machine brands
  • Kobelco – Machines with Isuzu or HINO engines
  • CASE – Excavators and Loaders with Tier 4 SCR systems
  • Hitachi – ZX Series construction machines
  • Link-Belt – Excavators and material handlers with DEF systems
  • Hidromek – H4 and H6 Excavators and Loaders
  • Terex – Powerscreen Crushing & Screening Machines
  • JCB – (On request – depending on engine variant – ONLY ISUZU Engine)
  • Volvo – (Limited support available – check compatibility)
  • New Holland / CNH – Agricultural models with SCR-based DEF systems – (FTP Engine upto 2014)

🔗 Explore our best construction machines for DEF removal emulators

Support & Guidance

FAQs – Disabling the DEF System

What is a DEF delete and how is it different from ECU tuning?
A DEF delete disables the AdBlue/DEF SCR system so the machine no longer depends on DEF components (tank, pump, NOx, injector). Our emulator is a plug-and-play hardware device on the DEF/SCR CAN line and does not alter ECU software, unlike remapping or tunes.
How do I confirm compatibility with my machine?
Share your machine make/model, engine code, year, and any DEF/NOx fault codes. If known, include CAN speed (250 or 500 kbps) and the DEF connector type. We’ll confirm the correct emulator and harness before shipping.
Where is the emulator installed and can it be reversed?
It connects to power/ground and the DEF/SCR CAN harness, typically using an adapter loom or OEM connector. Install is non-destructive and fully reversible by unplugging the emulator and reconnecting original components.
How long does installation take and what tools are needed?
Most installs take 30–60 minutes with standard hand tools. No laptop, ECU programming, or tuning is required.
Will disabling DEF affect the DPF or regeneration?
Our emulator targets the DEF/SCR system. DPF/regen behavior depends on the machine’s ECU strategy. In most off-road applications, normal regeneration continues; contact us with your model for guidance.
Will it stop limp mode and clear DEF-related fault codes?
Yes. It addresses common NOx, pump, quality, and tank sensor faults that cause derate. Some machines may need an ignition cycle or a one-time code clear to remove latched faults after install.
Is a DEF delete legal for my use case?
Products are supplied for off-road, agricultural, industrial, and export-only equipment. Laws vary by region (USA, Canada, UK, EU). The buyer is responsible for compliance and avoiding use on public roads.
Warranty and detectability considerations
Any emissions modification may affect warranty. Dealer diagnostics and inspections vary by manufacturer. Our hardware does not reflash the ECU, but always assume non-standard configurations can be detected.
Shipping and lead times
We ship worldwide (Canada, USA, UK, EU). Most orders dispatch within 1–2 business days. Express options are available to minimize downtime.
⚠️ Notice: Our emulators are intended for off-road, agricultural, industrial, and export-only applications. The buyer is responsible for local compliance.

🛒 Browse DEF Delete Emulator Kits by Brand

🧊 Built for Cold Weather & Harsh Sites

  • ❄️ Avoid frozen DEF & injector clogs
  • 🧱 Eliminate DEF heater failures
  • 🏗 Keep machines operational year-round
  • 🌍 Operate in harsh, remote, or export zones with zero DEF infrastructure

🔐 Legal Use & Off-Road Disclaimer

Our DEF emulator solutions are intended only for off-road, export, or non-emissions-regulated environments.

🔗 Understand the legal considerations for DEF bypass emulators

🚚 Fast Worldwide Shipping

We offer tracked, insured delivery to:

🇬🇧 UK | 🇺🇸 USA | 🇨🇦 Canada | 🇪🇺 Europe
⚙️ Fast installation & full tech support included

📞 Get Your DEF Delete Emulator Today

Whether you’re stuck in limp mode or tired of AdBlue faults ruining your job schedule — we’ve got the solution.

📞 Call our tech team to order the right emulator for your machine: