2011-2014 John Deere 4940 Series Sprayer Reflash

Tier4A Emission Reflash and Horsepower Tuning

We can ship anywhere in North America in 1 business day
Includes 1 year software warranty
Note: Items with expedited shipping ordered after 12 ET will not go out until the following day. 

Please take a minute to review our position on Over the Air (OTA) updates. 

Compatible Models

• 4630 Sprayer (2011-2014)
• 4940 Sprayer (2011-2014)

Note: If you have a 4730 or 4830 model from 2011-2014, please refer to our 2007-2011 EGR Reflash service.

Interim Tier 4 Emissions Equipment

These sprayers are equipped with advanced emissions control systems including EGR (Exhaust Gas Recirculation) and DPF (Diesel Particulate Filter) technology. Our tuning services are specifically designed to work with these Interim Tier 4 systems.

Tuning Process Options

Handheld Diagnostic Tuning - For sprayers with EGR/DPF systems operating normally (not in derated condition), we can perform the complete tuning process using portable diagnostic equipment. This approach provides convenient on-site service with faster completion times.

Bench Flash Service - If your sprayer is currently experiencing derate conditions and you don't have the capability to reset the derate status, we'll need to remove and send us the engine control module for bench flashing at our facility.

Choose Your Performance Level

Stage 1: Efficiency-Focused Enhancement

Stage 1 tuning emphasizes fuel economy optimization with moderate torque improvements. This calibration is perfect for operators seeking to reduce operating costs and extend spray coverage between refueling stops. The improved torque characteristics deliver better engine responsiveness during field work while maintaining superior fuel efficiency.

Stage 2: Maximum Power Enhancement

Stage 2 tuning maximizes horsepower and overall engine performance while still achieving better fuel economy than stock. This comprehensive enhancement unlocks your sprayer's full potential, delivering significant power gains that improve field performance, particularly in demanding conditions or when operating larger spray booms and implements.

Benefits of Professional Tuning

Improved Power Delivery - Better throttle response and torque characteristics for field operations

Maintained Reliability - Professional calibrations that work within safe engine parameters

Customized Performance - Choose the tuning level that matches your operation's priorities

Ready to optimize your John Deere sprayer's performance? Contact us to discuss which tuning option is right for your operation.

Emissions tuning is for off-road use only. Please consult your Provincial or State legislation, as this product may not be street legal. Removal of emissions systems cannot be performed on vehicles that are registered for highway use. It is up to the Consumer to know and understand their local legislation prior to purchasing. 

Reimer Tuning is proud to be owned and operated in Canada! We have been around since 2014, and we are excited to work with you! Please feel free to reach out to sales@reimertuning.com if you have any questions.