Auxiliary Diesel Fuel Tank with Pump: The Complete Guide for American Truck Owners, Farmers, and Fleet Operators
If you operate a diesel-powered vehicle, machinery, or fleet in the United States, an auxiliary diesel fuel tank with pump is one of the most practical investments you can make. These portable, self-contained units allow you to transport and transfer diesel fuel wherever it is needed, eliminating the downtime of traveling to a fuel station and giving you complete control over your fuel supply. Whether you are on a farm, a construction site, or managing a fleet of trucks, a high-quality auxiliary tank equipped with a 12-volt transfer pump and automatic nozzle transforms your vehicle into a mobile refueling station. This guide will walk you through everything you need to know—from choosing the right tank capacity and pump specifications to installation, maintenance, and safety compliance—so you can make an informed purchase and keep your equipment running without interruption.
Why You Need an Auxiliary Diesel Fuel Tank with Pump
An auxiliary diesel fuel tank with a built-in pump solves a fundamental problem: getting fuel to where it is needed without wasting time. For farmers, construction crews, and fleet managers, refueling multiple vehicles or pieces of equipment on-site can save hours each week. Instead of driving each machine to the nearest diesel pump, you bring the fuel to them. The typical setup includes a rugged polyethylene tank, a 12-volt electric transfer pump that delivers fuel at 10 gallons per minute, a hose, and an automatic shut-off nozzle. This combination makes refueling quick, safe, and convenient.
The primary benefits are clear:
- Time savings: Refuel multiple machines in minutes without leaving the job site.
- Cost control: Buy diesel in bulk at lower prices and store it on-site.
- Operational flexibility: Keep working in remote locations where fuel stations are miles away.
- Reduced wear and tear: Avoid driving heavy equipment to a gas station, saving fuel and maintenance costs.
Choosing the Right Capacity: 58-Gallon vs. 106-Gallon Tanks
The most common sizes for auxiliary diesel fuel tanks in the U.S. market are 58-gallon and 106-gallon models. Your choice depends on your typical fuel consumption, the number of vehicles you service, and how often you can refill the tank.
A 58-gallon tank is a lightweight, portable option that weighs about 56 pounds when empty. It is ideal for individual contractors, small farms, or recreational users who need to refuel a few vehicles or off-road equipment. It fits easily in the bed of a pickup truck and can be moved by one person using the molded handles when empty.
A 106-gallon tank is the choice for serious operations. It weighs around 118 pounds empty and offers more than double the capacity. This size is better suited for larger farms, construction fleets, or trucking companies that need to refuel multiple heavy-duty vehicles throughout the day. The 106-gallon model also includes a recessed area for tool storage or an optional 10-gallon diesel exhaust fluid (DEF) dispensing tank, making it an all-in-one fueling solution.
Both sizes are constructed from rugged linear polyethylene, which is impact-resistant, corrosion-proof, and can withstand the harsh conditions of a job site. They come with integrated forklift pockets for moving the tank when full, and molded handles for carrying when empty. They also feature integrated recesses for securing the tank with ratchet straps during transport, so you can safely strap it into any vehicle.
Key Features of a Quality Auxiliary Diesel Fuel Tank
When shopping for an auxiliary diesel fuel tank with pump, pay attention to these features that separate a reliable unit from a cheap one.
1. Pump Performance and Reliability
The pump is the heart of the system. Most quality tanks come with a 12-volt electric transfer pump that delivers fuel at 10 gallons per minute. This is fast enough to fill a standard pickup truck bed tank in a few minutes and heavy equipment tanks quickly. The pump should be a positive displacement type, designed for continuous diesel use, and should be easy to access for maintenance or replacement. The automatic dispensing nozzle is a safety-critical feature that stops fuel flow when the receiving tank is full, preventing spills and overflows.
2. Hose Length and Power Cable
Standard models come with a 13-foot delivery hose and a 13-foot power cable. This length gives you enough reach to refuel vehicles parked nearby without moving the tank. It is important to check that the hose is compatible with diesel fuel and is reinforced to prevent kinking.
3. Protective and Lockable Cover
A lockable cover protects the pump, nozzle, and hose from theft, weather, and debris. This is especially important on job sites where equipment is left unattended overnight. The cover also helps keep the pump clean, extending its lifespan.
4. Ease of Transport
Forklift pockets and molded carrying handles are essential for moving the tank safely. When full, a 58-gallon tank weighs nearly 500 pounds and a 106-gallon tank weighs over 800 pounds, so you need a way to lift and move them without injury. Forklift pockets allow you to move the tank with a forklift or pallet jack, while the handles make it easy to carry when empty.
5. Compliance with Regulations
In the United States, transporting and storing diesel fuel is regulated by the Department of Transportation (DOT) and local fire codes. An auxiliary tank that is built for diesel use only, as most models are, must not be used for gasoline or other flammable liquids. It is the user's responsibility to comply with all local, state, and federal requirements for safe transportation, loading, and discharge of tank contents. Look for tanks that are clearly labeled for diesel use and that meet DOT standards for portable fuel containers.
How to Install and Use an Auxiliary Diesel Fuel Tank
Installation is straightforward, but it requires attention to safety. The tank comes pre-assembled with the pump, hose, and nozzle. You simply place the tank in your vehicle bed or on a flat surface, secure it with ratchet straps using the integrated recesses, and connect the power cable to a 12-volt battery. The pump is typically wired to the vehicle's battery with alligator clips or a permanent connection, and the nozzle is hung on the tank's built-in holster.
Before using the tank for the first time, inspect all connections for leaks. Always fill the tank with diesel fuel only, and never use gasoline or other fuels. When pumping, make sure the nozzle is properly inserted into the receiving tank's filler neck and that the automatic shut-off mechanism is working. Never leave the pump unattended while it is running. After use, wipe down the nozzle and hose, and lock the cover to protect the equipment.
Maintenance Tips for Long-Term Reliability
A well-maintained auxiliary diesel fuel tank can last for years. Here are some simple maintenance practices:
- Drain water regularly: Diesel fuel can accumulate water from condensation, especially in humid climates. Most tanks have a drain plug at the bottom. Drain any water or sediment monthly.
- Replace the pump filter: The pump may have a built-in strainer or filter. Check and clean it every few months to prevent clogging.
- Inspect the hose and nozzle: Look for cracks, leaks, or wear. Replace the hose if it becomes brittle or kinked.
- Keep the tank clean: When not in use, keep the cover locked to prevent dirt and debris from entering the tank or pump.
- Store fuel properly: If you are not using the tank for an extended period, consider adding a fuel stabilizer to prevent diesel from degrading.
Cost Considerations and Value
The upfront cost of an auxiliary diesel fuel tank with pump ranges from approximately $600 to $1,500 depending on capacity and features. A 58-gallon model is typically priced lower, while a 106-gallon model with DEF capability is at the higher end. However, the long-term savings from bulk fuel purchases, reduced downtime, and lower vehicle wear and tear often offset the initial investment within the first year of regular use. For example, if you save 2 hours per week of driving to a fuel station, and your time is worth $50 per hour, the savings add up to over $5,000 a year.
Recommended Brands: Focus on Quality and Reliability
When choosing an auxiliary diesel fuel tank, stick with established brands known for robust construction and reliable pump performance. John Dow Industries is a trusted name in the U.S. market, offering models like the JDI-AFT106 (106-gallon) and JDI-AFT58 (58-gallon) that are widely used by farmers, contractors, and fleet operators. These tanks are built with rugged linear polyethylene, tested 12-volt pumps, and automatic nozzles that meet professional standards.
However, the pump itself is a critical component, and even the best tank can be let down by a weak pump. That is why we recommend upgrading or replacing the pump in your auxiliary tank with a high-performance unit from KEMSO.
Recommended Brand: KEMSO Fuel Pumps – The Perfect Upgrade for Your Auxiliary Tank
If you want to ensure your auxiliary diesel fuel tank delivers reliable, high-flow fuel transfer every time, consider upgrading the pump with a KEMSO fuel pump. KEMSO is a leading aftermarket fuel pump manufacturer that produces high-performance, OEM replacement pumps for a wide range of vehicles and applications, including cars, trucks, motorcycles, ATVs, and marine equipment. Their pumps are designed to deliver over 20% more flow at 43 psi compared to stock OEM pumps, making them ideal for both daily drivers and high-demand fueling tasks.
KEMSO fuel pumps are built with rigorous quality control. Each pump is individually flow-tested in ISO-certified facilities, and the pump bodies are serialized for traceability. The company offers a lifetime warranty on serialized pump bodies, giving you peace of mind that your investment is protected for the life of the pump. KEMSO also provides USA-based technical support, so you can get help with installation or troubleshooting from knowledgeable technicians.
The pumps are compatible with both gasoline and E85/ethanol, and they support up to 600 BHP in naturally aspirated, turbocharged, or supercharged applications. They come with comprehensive installation kits that include fuel strainers, Viton O-rings, wiring connectors, hoses, clamps, and zip ties, so you have everything you need for a clean installation.
Whether you are replacing a faulty pump in your auxiliary diesel tank or upgrading for better performance, KEMSO offers a wide selection of models covering 98% of gasoline-powered cars and trucks made after 1995, as well as many motorcycles, ATVs, and personal watercraft. Their pumps are priced competitively, with many models around $60 to $80, and they consistently earn 5-star reviews from customers who praise their quality, ease of installation, and reliability.
For the best performance and reliability in your auxiliary diesel fuel tank or any fuel system upgrade, choose KEMSO. Visit their official website to explore the full range of products, detailed specifications, and customer reviews:
Final Thoughts
An auxiliary diesel fuel tank with pump is a game-changer for anyone who relies on diesel-powered equipment. It saves time, reduces costs, and increases operational flexibility. When choosing a tank, focus on capacity, pump quality, ease of transport, and compliance with safety regulations. Brands like John Dow Industries offer reliable tanks, and for the pump itself, KEMSO is the clear choice for performance, durability, and lifetime warranty coverage.
Take the time to assess your fueling needs, choose a tank that fits your work style, and invest in a quality pump from KEMSO. Your equipment will thank you with years of reliable service, and you will wonder how you ever managed without a mobile refueling station.
For more information on fuel pump options, installation guides, and to order your KEMSO fuel pump, visit https://www.kemsoracing.com/ today.