Manitou DEF, DPF, and EGR Delete Tuning – TM AG Tuning
October 7, 2025
If you own an Avant 850 or Avant 750 wheel loader, you know how capable and compact these machines are. However, like many Tier 4-compliant machines, they come equipped with emission control systems such as the DOC (Diesel Oxidation Catalyst) and EGR (Exhaust Gas Recirculation). While these systems help meet emissions regulations, they can also cause unnecessary downtime, higher maintenance costs, and reduced engine performance.
At TM AG Tuning, we offer a professional DOC and EGR delete service for Avant 850 and Avant 750 loaders. With our ECU tuning, we can safely disable these emission systems and increase your engine output to 80 horsepower, improving both power and reliability.
What is the DOC (Diesel Oxidation Catalyst)?
The Diesel Oxidation Catalyst (DOC) is an emission control component that burns off unburned hydrocarbons and carbon monoxide from the exhaust stream. It’s essentially a catalytic converter for diesel engines. Over time, the DOC can clog or restrict exhaust flow, causing:
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Increased exhaust backpressure
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Higher exhaust temperatures
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Reduced turbo efficiency
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Loss of power and sluggish throttle response
In some cases, a failing DOC can also trigger frequent regeneration cycles, which interrupt your work and lead to excessive fuel consumption.
What is the EGR (Exhaust Gas Recirculation) System?
The EGR system recirculates a portion of the exhaust gases back into the intake to reduce combustion temperatures and lower NOx emissions. While this helps with emissions, it also introduces soot and carbon buildup into the intake system. Over time, this leads to:
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Restricted airflow
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Dirty intake valves and turbo vanes
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Reduced engine life
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Lower fuel efficiency
EGR-related issues are some of the most common causes of performance loss and downtime in modern diesel engines.
Benefits of a DOC and EGR Delete on Avant Loaders
By removing and tuning out these restrictive systems, you can unlock your Avant loader’s true potential. Here are the main advantages of a TM AG Tuning DOC & EGR delete:
✅ More Power and Torque – We tune the Avant 850 and 750 up to 80 horsepower, giving you stronger performance for heavy-duty work and improved hydraulic response.
✅ Better Fuel Efficiency – With less exhaust restriction and more efficient combustion, your loader runs smoother and uses less fuel.
✅ Improved Reliability – No more clogged DOCs, failed sensors, or EGR valve problems. Your engine runs cleaner and cooler.
✅ Reduced Downtime – Eliminate costly repair intervals and unpredictable regeneration cycles.
✅ Extended Engine Life – Cleaner airflow and lower soot buildup mean longer-lasting components and fewer maintenance issues.
How Our Avant 850 & 750 Delete Process Works
For the Avant 850 and Avant 750, we require the ECU (Engine Control Unit) to be sent in for tuning. This allows us to safely and accurately modify the software to remove the DOC and EGR functions and increase performance.
Process:
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Remove your ECU and send it to TM AG Tuning.
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We perform a custom bench tune to disable the DOC and EGR functions.
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The tune is optimized for 80HP output, maintaining safe operating temperatures and engine reliability.
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We ship your ECU back ready to install — plug it in and go to work.
This process eliminates the need for complex wiring or on-site tools — we handle the tuning in-house for precision and reliability.
Why Choose TM AG Tuning?
TM AG Tuning specializes in off-road diesel tuning solutions for agriculture and construction equipment. We focus on reliability, performance, and simplicity — giving you tuning that works as hard as your machine does.
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Expert diesel ECU tuning for loaders, tractors, and heavy equipment
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Proven horsepower gains and torque improvements
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Safe, tested tuning files customized for each machine
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Fast turnaround and top-tier customer support
We’ve tuned hundreds of machines across North America, helping operators get more power, better fuel economy, and fewer headaches from emission systems.
Get Your Avant Loader Tuned Today
Ready to take your Avant 850 or Avant 750 to the next level? With DOC and EGR delete tuning from TM AG Tuning, you’ll gain smoother power delivery, fewer repairs, and up to 80 horsepower of reliable performance.
Contact TM AG Tuning today to schedule your tune and learn how easy it is to send in your ECU for programming.
