Superior Diesel Inc.

Superior Diesel Inc. Superior Diesel is a leading Value-Added Distributor of John Deere and Rehlko engines and Funk Drivetrain components.

We deliver custom power solutions for diverse applications like generators, water pumps, marine, forestry, and more. Superior Diesel was established in 1977 and is headquartered in Rhinelander, Wisconsin. Our 49,000 square foot full-service facility is proudly placed in the beautiful Northwood’s of Wisconsin. Our second 39,000 square foot full-service facility is located in Seville, OH. Together w

e are able to provide premium customized value-added packages to the Midwestern United States. Superior Diesel’s key products and services include, but are not limited to:
• Engineered to order modular diesel engine and Drivetrain packages for OEM and other applications.
• Standard open and enclosed engine power units for irrigation, power generation, and industrial applications.
• New and remanufactured replacement engines, repower kits, and “Tier-Up” repower kits for off highway diesel engine applications.
• John Deere engine parts, Funk Drivetrain units & components, and Value-Added components used in our power packages including; cooling systems, oil coolers, exhaust, air intake systems, engine system controls (mechanical and electronic), and control cables.

05/28/2026

Superior Diesel's service department was contacted by an OEM customer, on behalf of an end user who recently purchased a woodchipper and was experiencing issues with "regen". More specifically, a lack of passive regeneration of the aftertreatment. Our service department worked with the end user to troubleshoot his codes/issues over the phone. After exhausting the troubleshooting that the end user was comfortable with, the decision was made to involve his local John Deere servicing dealer.

The servicing dealer determined the engine was not going through passive regen due to the way the engine/machine had been operated. When the customer received a bill for the service level regen performed at the dealer they involved us as their OEM distributor service support. We contacted the dealer, but they had not retained the ECU regen abort load profile, so the customer had to bring the machine back to the dealer for a quick scan of the ECU. The reports revealed an issue with the engine's ability to reach operating temperature.

Through these reports we determined this machine needed to be monitored through John Deere Operations Center. Working with the OEM and the end-user, we supplied a JDLink (Connected Support) modem that the OEM was able to install. Once installed, our service team began to remotely monitor the engine through John Deere Operations Center. While remotely monitoring we again saw the engine was unable to reach proper operating temperature. Going a step further, we contacted the end user and local servicing dealer, to arrange for the machine to be brought back to the dealer so the thermostats could be inspected and replaced (if broken).

During dealer service, they found one of the thermostats was broken. The thermostat was replaced and the dealer confirmed the replacement of the thermostat resolved the operating temperature issue and regens were now successful. The machine is back in the field and has been operating ever since. Thanks to John Deere Connected Support, Superior Diesel is able to continue to monitor this machine, as well as many others, through John Deere Operations Center, to catch issues such as these before they cause down time. (Contact us to retroactively apply Connected Support to your equipment)

This is a story of success for not only Superior Diesel's Service and Product Support department, but for genuine John Deere's Connected Support, our OEM and customer base, and John Deere's network of servicing dealers.

05/28/2026

We're hiring a Product Manager to support our Rehlko product line!

Are you sales / marketing minded with an interest in engines?

We're adding another Product Manager to the team. This role is responsible for developing and implementing product and marketing strategies that drive profitable growth across assigned product lines and applications. Responsibilities include product planning, market analysis, pricing strategy, material forecasting, customer support, and competitive research. The ideal candidate has strong communication and problem-solving skills, experience in a manufacturing environment, and the ability to manage multiple projects while collaborating across sales, engineering, purchasing, and service teams.

Located in person in Rhinelander, WI.
View full job description and apply: http://sdiesel.com/careers

Superior Diesel is a leading Value-Added Distributor of John Deere and Rehlko engines and Funk Drivetrain components. We deliver custom power solutions for diverse applications like generators, water pumps, marine, forestry, and more.

The John Deere JD 18P is engineered for applications where uptime, torque stability, and long-term durability are non-ne...
05/26/2026

The John Deere JD 18P is engineered for applications where uptime, torque stability, and long-term durability are non-negotiable.

Built around a high-output diesel architecture, the JD 18P focuses on delivering consistent power under variable load conditions. Its combustion system is optimized for efficiency at both low and high RPM ranges, allowing operators to maintain performance without excessive fuel consumption or thermal stress.

What sets this platform apart is its balance between raw mechanical strength and modern engine control. Advanced electronic management continuously adjusts injection timing and fuel delivery to ensure smooth torque curves, reduced emissions, and improved response under sudden load changes.

From a design standpoint, the engine is reinforced for harsh environments vibration resistance, thermal stability, and extended service intervals are all prioritized to reduce downtime in real-world operations.

In essence the JD 18P is not just about peak power output—it's about delivering controlled, repeatable performance in conditions where failure is not an option.

Key strengths:
- High torque availability across a wide operating range.
- Precision fuel injection for optimized combustion efficiency.
- Reinforced heavy-duty block design for industrial stress loads.
- Electronic engine management for adaptive performance control.
- Extended maintenance intervals designed for fleet productivity.

Typical applications:
Commercial and recreational marine propulsion, Marine power generation and marine auxiliary power units.

Power, efficiency, and durability exactly what your equipment needs to perform at its best.

Connect with us and discover engine solutions built around your performance needs.

Superior Diesel
888-333-7376
http://sdiesel.com/?utm_campaign=coschedule&utm_source=facebook_page&utm_medium=Superior%20Diesel%20Inc%2E

Our offices will be closed on May 25, 2026, as we take time to remember and reflect. Wishing everyone a safe and meaning...
05/25/2026

Our offices will be closed on May 25, 2026, as we take time to remember and reflect. Wishing everyone a safe and meaningful holiday weekend from Superior Diesel and Bell Power Systems.

Superior Diesel, Inc's. acquisition of the defined territory allows us to expand on our ability to support our Rehlko cu...
05/22/2026

Superior Diesel, Inc's. acquisition of the defined territory allows us to expand on our ability to support our Rehlko customers across a broader geographic region with faster response times, proven engineered value-added solutions, technical expertise, and dependable product support. Acquiring this territory strengthens our ability to deliver the high level of service and reliability customers count on to keep their operations running efficiently and without interruption.

Our teams are working directly with OEMs and dealers to strengthen relationships and identify new opportunities to better serve their evolving needs. Inventory and operational processes are being structured to ensure customers benefit from improved product availability, faster fulfillment, and a higher level of service.

This acquisition represents more than geographic growth; it reflects our continued investment in our people, our partnerships, and the long-term success of our customers.

We look forward to building strong relationships across this new territory and continuing to deliver the level of service, reliability, and partnership that defines the Superior Diesel Group.

05/21/2026

Coverage that works as hard as your equipment.

Superior Diesel warranty support is designed to minimize downtime, streamline service, and give you confidence in every hour of operation.

We're hiring a Rehlko Product Manager!We're adding another Product Manager to the team. This role is responsible for dev...
05/20/2026

We're hiring a Rehlko Product Manager!

We're adding another Product Manager to the team. This role is responsible for developing and implementing product and marketing strategies that drive profitable growth across assigned product lines and applications. Responsibilities include product planning, market analysis, pricing strategy, material forecasting, customer support, and competitive research. The ideal candidate has strong communication and problem-solving skills, experience in a manufacturing environment, and the ability to manage multiple projects while collaborating across sales, engineering, purchasing, and service teams.

Located in person in Rhinelander, WI.

View full job description and apply: http://sdiesel.com/careers?utm_campaign=coschedule&utm_source=facebook_page&utm_medium=Superior%20Diesel%20Inc%2E

We're hiring an Assembly Technician!This role is responsible for assembling engine packages, parts, and subassemblies wh...
05/19/2026

We're hiring an Assembly Technician!

This role is responsible for assembling engine packages, parts, and subassemblies while ensuring quality, accuracy, and efficiency throughout the production process. Responsibilities include reading blueprints, using hand and power tools, inspecting completed assemblies, troubleshooting components, maintaining inventory, and supporting a safe and organized work environment. The ideal candidate has strong mechanical aptitude, attention to detail, and the ability to work across multiple production areas in a fast-paced manufacturing environment.

This is an in-person position located in Rhinelander, WI.

View full job description and apply: http://sdiesel.com/careers?utm_campaign=coschedule&utm_source=facebook_page&utm_medium=Superior%20Diesel%20Inc%2E

Control when you need it. Efficiency where it matters.The collaboration between John Deere and Funk Drivetrain brings fo...
05/14/2026

Control when you need it. Efficiency where it matters.

The collaboration between John Deere and Funk Drivetrain brings forward HMD (Hydro-Mechanical Drive) transmissions engineered for today's toughest off-highway applications.

By combining hydrostatic flexibility with mechanical efficiency, HMD transmissions deliver smooth power, precise control, and optimized performance under load.

What makes HMD different?
- Hydro-mechanical power split for maximum efficiency.
- Continuous speed variation with consistent torque.
- Reduced fuel consumption compared to full hydrostatic systems.
- Built for durability in demanding environments.
- Electronic controls for enhanced operator precision.

Where it performs

From construction sites to agricultural fields and forestry operations, HMD transmissions are designed for machines that require both strength and control.

The takeaway

HMD technology strikes the right balance efficiency, control, and reliability making it a smart choice for modern equipment design.

Curious about integrating this type of drivetrain into your machines? Let's connect.

Superior Diesel
888-333-7376
http://sdiesel.com/?utm_campaign=coschedule&utm_source=facebook_page&utm_medium=Superior%20Diesel%20Inc%2E

We're gearing up for the Inland Marine Expo and are proud to be joining the John Deere exhibit in Booth 701.Come see the...
05/13/2026

We're gearing up for the Inland Marine Expo and are proud to be joining the John Deere exhibit in Booth 701.

Come see the JD14 and JD18 up close and discover a new era in power.

Make sure to stop in and say hello.

Address

3250 S Fox Ranch Road
Rhinelander, WI
54501

Opening Hours

Monday 8am - 5pm
Tuesday 8am - 5pm
Wednesday 8am - 5pm
Thursday 8am - 5pm
Friday 8am - 5pm

Telephone

(715) 365-0500

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